MCQs
1. A time-sharing system implies:
2. A multiprocessor computer is of the type:
3. Microprocessor is a device which has at least:
4. A supercomputer has the capabilities of execution:
5. The maximum stages in pipelining architecture are:
6. Instruction pipelining has minimum stages:
7. Systems do not have parallel processing capabilities are:
8. Memory access in RISC architecture is limited to instructions:
9. Interrupt which are initiated by an I/O device are:
10. Interrupt which are initiated by an instruction are:
11. States bit of the CPU are stored in a flag:
12. The effective address is the address of the operand in an instruction of type:
13. Program counter of a CPU stores the address of the instruction:
14. A stack-organized computer has:
15. The operation performed on stack are:
16. The stack is the list of type:
17. A microprocessor consists of:
18. A microprocessor sequencer performs the operation:
19. A microprogram written as a string of 0's and 1's is a:
20. The branch logic that provides decision-making capabilities in the control unit is known as:
21. A control unit whose binary control variables are stored in memory is known as:
22. During execution, subroutine return address is stored in:
23. The next address generator is sometimes called a:
24. The control data register holds the present microinstruction and is sometimes called:
25. A memory that is a part of a control unit is referred to as:
26. Whenever POP H instruction is executed:
27. When the RET instruction at the end of a subroutine is executed:
28. When a subroutine is called, the address of the instruction following the CALL is stored in/on the:
29. A stack pointer is:
30. A stack is:
31. A third and last component of CPU is:
32. The section of the CPU that selects, interprets, and sees to the execution of program instructions is:
33. A device used to bring information into a computer is:
34. A microprocessor is a..... on a chip:
35. Part of the computer where the data and instructions are held is:
36. Backing storage is so named because:
37. The ALU and control unit of most of the microcomputers are combined and manufactured on a single silicon chip. What is it called?
38. Which of the following code used in present-day computing was developed by IBM corporation?
39. Which parts of the computer are used for calculating and comparing?
40. Instruction LXI in 8085 loads:
41. A CALL instruction is always encountered by instructions:
42. In I/O mapped I/O 8085 duplicates the I/O address on:
43. Address and data line in 8085 are:
44. The 16-bit register in 8085 is:
45. Microprocessor 8085 can address location up to:
46. Pipeline processing implements:
47. Pipeline strategy is called implement:
48. Intel 80486 pipelining implements stages:
49. Pipeline processing uses the technique:
50. Micro instructions are stored in:
51. Hardwired control unit is implemented by:
52. Control unit operation is performed:
53. Micro instructions are stored in the:
54. The registers are essential to instruction execution:
55. In immediate addressing the operand is placed:
56. The most common addressing technique employed by a CPU is:
57. CPU does not perform the operation:
58. Branch instructions are used to:
59. Arithmetic instructions provide:
60. The ALU of a central processing unit does the essential math work for the computer. What does the control unit do?
61. Which type of computers use the 8-bit code called EBCDIC?
62. The ALU of a computer responds to the commands coming from:
63. The microprocessor of a computer cannot operate on any information if that information is not in its:
64. Who coordinates the sequencing of events within the central processor or computer?
65. A computer program that converts an entire program into machine language at one time is called a/an:
66. What is meant by a dedicated computer?
67. A complete microcomputer system consists of:
68. Which major development led to the production of microcomputers?
69. The word size of a microprocessor refers to:
70. One computer that is not considered a portable computer is:
71. Which of the following require large computer memory?
72. A computer enthusiast is:
73. Most of the inexpensive personal computers do not have any disk or diskette drive. What is the name of such computers?
74. A computer has no more sense than a light
75. How many address lines are needed to address each memory locations in a 2048x4 memory chip?
76. The stack pointer in the 8085 microprocessor is a
77. Which of the following registers is used to keep track of address of the memory location where the next instruction is located?
78. Which of the following registers is loaded with the content of memory location pointed by the PC?
79. In which addressing mode, the effective address of the operand is generated by adding a constant value to the contents of a register?
81. Super computers are primarily useful for
82. The heart of any computer is the
83. The central processing unit (CPU) consists of:
84. Which is not an input device?
85. The ascending order of a data hierarchy is:
86. What is the control unit's function in the CPU?
87. The most common input device used today is
88. Which is not a factor when categorizing a computer?
89. Which is not true for primary storage?
90. Which is the most powerful type of computer?
91. Which kind of storage device can be carried around?
92. Which kind of devices allows the user to add components and capabilities to a computer system?
93. Group of instructions that direct a computer is called
94. The basic components of a modern digital computer are:
95. A collection of eight bits is called:
96. Processor of all computer, whether micro, mini or mainframe must have
97. Where does a computer add and compare data?
98. If a particular idea can be implemented in hardware or software, the factor(s) that favor hardware implementation is/are
99. Tera is 2 to the power of
100. Von Neumann architecture is
101. To achieve parallelism, one needs a minimum of
102. SIMD can be used for
103. A typical application of MIMD is
104. Let * be defined as ab=a+b. Let m=ab. The value of m*a is
105. RST 7.5 interrupt in 8085 microprocessor executes services from interrupt vector location
106. Three main components of a digital computer system are
107. Micro program is
108. A toggle operation cannot be performed using a single
109. 'n' flip-flops will divide the clock frequency by a factor of
110. Most of the digital computers do not have floating-point hardware because
111. An assembler that runs on one machine but produces machine code for another machine is called.
112. Which of the following is not typically found in the status register of a microprocessor?
113. When even-parity ASCII text is transmitted asynchronously at a rate of 10 character per second over a line, what percentage of the received bits actually contain data (as opposed to overhead)?
114. A subtractor is not usually present in a computer because
115. Let an (a_{n-1}, \ldots, a_1) be the binary representation of an integer b. The integer b is divisible by 3 if
116. Which of the following 4-bit numbers equals its 2’s complement?
117. Which of the following 4-bit numbers equals its 1’s complement?
118. FFFF will be the last memory location in a memory of size
119. If you want to design a boundary counter, you should a prefer a flip flop of
120. Suppose the largest n-bit binary number 'd' digits in decimal representation. Which of the following relations between 'n' and 'd' is approximately correct?
121. A computer uses 8-digit mantissa and 2-digit exponent. If a=0.052 and b=28E+11, then b+a-b will
122. Which of the following binary numbers are not divisible by 4?
123. A computer with a 32-bit wide data bus uses 4K x8 static RAM memory chips. The smallest memory this computer can have is
124. Which of the following instructions requires the greatest number of T-states?
125. The 8085 microprocessor enters into wait state after the recognition of
126. Maximum number of I/O devices that can be addressed by Intel 8085 is
127. The microprocessor may be made to exit from HALT state by asserting
128. The number of RAM chips of size (256 K x 1) required to build a 1 M byte memory is
129. The instruction used to shift right the accumulator contents by one bit through the carry flag bit is
130. The stack is nothing but a set of
131. The execution of RST instructions causes the stack pointer to
132. Which one of the following instructions may be used to clear the accumulator content (i.e. A=00h) irrespective of its initial value?
133. The only interrupt that is edgetriggered is
134. Which of the following peripheral ICs is used to interface keyboard and display?
135. The contents of the A15-A8(higher order address lines) while executing "IN addr" instructions are
136. Which one of the following instructions will never affect the zero flag?
137. Which one of the following interrupts is non-mask able?
138. RST 3 instruction will cause the processor to branch to the location
139. The minimum number of bits required to represent a character from ASCII code set is
140. S0 and S1 pins are used for
141. Pick out the matching pair
142. Which of the following is unipolar, difficult to fabricate, has very high speed and offers good resistance to radiation?
143. Multiplexing of data/address lines in 8085 microprocessor reduces the instructions execution time. This statement is
144. The number of flip-flops needed to construct a binary modulo N counter is
145. To change an upper-case character to a lower-case character in ASCII, the correct mast and operation should be
146. PCHL is an instruction in 8085 which transfers the contents of the register pair HL to PC. This is not a commonly used instruction as it changes the flow of control in a rather unstructured fashion. This instruction cannot be used in implementing
147. In an 11-bit computer instruction format, the size of address field is 4 bits. The computer uses expanding OP code technique and has 5 two-address instructions and .32 one-address instructions. The number of zero address instructions it can support is
148. Which of the following instructions may be used to save the accumulator value onto the stack?
149. Which of the following statements is true?
150. A single instruction to clear the lower four bits of the accumulator in 8085 assembly language is
151. In a vectored interrupt
152. A sequence of two instructions that multiplies the contents of the DE register pair by 2 and stores the result in the HL register pair (in 8085 assembly language) is
153. The most relevant addressing mode to write position-independent code is
154. Which of the following are CISC machines?
155. The working of a staircase switch is a typical example of the logical operation
156. Which of the following are typical characteristics of a RISC machine?
157. A microprogrammed control unit
158. Parallel printer uses
159. The ASCII code 56 represents the character
160. The number of possible Boolean functions that can be defined for n Boolean variables over n-valued Boolean algebra is
161. The advantage of a single bus over a multi-bus is the
162. Which of the following rules regarding the addition of 2 given numbers is correct, if negative numbers are represented in 2's complement form?
163. When INTR is encountered, the processor branches to the memory location, which is
164. In which of the following instructions does bus idle situation occur?
165. Any instruction should have at least
166. If the cache needs an access time of 20ns and the main memory 120 ns, then the average access time of a CPU is (assume hit-ratio is 80%)
167. The number of clock cycles necessary to complete 1 fetch cycle in 8085 (excluding wait state) is
168. The seek time of a disk is 30ms. It rotates at the rate of 30 rotations per second. Each track has a capacity of 300 words. The access time is approximately
169. Motorola's 68040 is comparable to
170. The possible number of Boolean functions of 3 variables X, Y, and Z such that f(X, Y, Z) = F(X', Y', Z') is
171. Which of the following interrupts is both level and edge sensitive?
172. The difference between 80486 and 80386 is/are
173. The addressing mode used in the instruction PUSH B is
174. Which of the following architecture is/are not suitable for realizing SIMD?
175. The total number of possible Boolean functions involving 'n' Boolean variables is
176. If ((11A1B)_8 = (12C9)_16) (C stands for decimal 12), then the value of A and B are:
177. Which of the following operations(s) is/are not closed as regards to computers?
178. Which of the following units can be used to measure the speed of a computer?
179. If A XOR B = C, THEN
180. Addressing capability of 8086/88 are
181. Bubble memories are preferable to floppy disks because
182. The XOR operation is
183. Which of the following logic families is well suited for high-speed operation?
184. Which of the following does not have 8 data lines?
185. Negative numbers cannot be represented in
186. The addressing mode used in an instruction of the form ADD X, Y is
187. Which of the following are registers?
188. IBM developed a bus standard for their line of computers ‘PC AT’ called______.
189. Which of the following is the programmable internal timer?
190. Bipolar devices are desirable in the fabrication of which of the following components?
191. A+B can be implemented by
192. Which of the following are the correct statements?
193. A number system uses 20 as the radix. The excess code that is necessary for its equivalent binary-coded representation is
194. Any given truth table can be represented by a
195. Which of the following remarks about PLA is/are true?
196. The first operating system used in microprocessor is
197. Which of the following does not need extra hardware for DRAM refreshing?
198. The advantage of MOS devices over bipolar devices is
199. Which of the following comments about the Program Counter (PC) are true?
200. Choose the correct statements from the following
201. Property of locality of reference may fail if a program has
202. In Reverse Polish notation, expression AB+CD is written as
203. SIMD represents an organization that______.
204. Floating point representation is used to store
205. Suppose that a bus has 16 data lines and required 4 cycles of 250 nano seconds each to transfer data. The bandwidth of this bus would be 2 Megabytes/sec. If the cycle time of the bus was reduced to 125 nsecs and the number of cycles required for transfer stayed the same what would the bandwidth of the bus?
206. Assembly language
207. In computers, subtraction is generally carried out by
208. The amount of time required to read a block of data from a disk into memory is composed of seek time, rotational latency, and transfer time. Rotational latency refers to
209. What characteristic of RAM memory makes it not suitable for permanent storage?
210. Computers use addressing mode techniques for:
211. The circuit used to store one bit of data is known as
212. (2FAOC)16 is equivalent to:
213. The average time required to reach a storage location in memory and obtain its contents is called the:
214. Which of the following is not a weighted code?
215. ______ register keeps track of the instructions stored in program stored in memory.
216. The addressing mode used in an instruction of the form ADD X Y, is
217. In a memory-mapped I/O system, which of the following will not be there?
218. In a vectored interrupt:
219. Cache memory acts between
220. Write Through technique is used in which memory for updating the data:
221. Generally Dynamic RAM is used as main memory in a computer system as it
222. In signed-magnitude binary division, if the dividend is (11100)₂ and divisor is (10011)₂ then the result is
223. Virtual memory consists up:
224. In a program using subroutine call instruction, it is necessary
225. When CPU is executing a Program that is part of the Operating System, it is said to be in
226. A-Flip Flop can be converted into T-Flip Flop by using additional logic circuit
227. Logic X-OR operation of (4ACO) H& (B53F) H results
228. An n-bit microprocessor has
229. Cache memory works on the principle of:
230. The main memory in a Personal Computer (PC) is made of:
231. The circuit converting binary data into decimal is
232. PSW is saved in stack when there is a
233. A combinational logic circuit which sends data coming from a single source to two or more separate destinations is:
234. In which addressing mode the operand is given explicitly in the instruction:
235. The gray code equivalent of (1011)₂ is
236. A system program that translates and executes an instruction simultaneously is:
237. When necessary, the results are transferred from the CPU to main memory by
238. A successive A/D converter is:
239. The memory unit that communicates directly with the CPU is called the
240. The average time required to reach a storage location in memory and obtains its content is called:
241. A k-bit field can specify:
242. The time interval between the adjacent bits is called:
243. A group of bits that tell the computer to perform a specific operation is known as:
244. The load instruction is mostly used to designate a transfer from memory to a processor register known as:
245. The communication between the components in a microcomputer takes place via:
246. An instruction pipeline can be implemented by means of:
247. Data input command is a just the opposite of a:
248. The operation executed on data stored in registers is called:
249. MRI indicates:
250. Self-contained sequence of instructions that performs a given computational task is:
251. What is the purpose of an instruction register (IR) in a computer system?
252. What is a control unit in a computer system responsible for?
253. What type of computer organization uses a Harvard architecture?
254. What is the purpose of a cache in a computer system?
255. What is an embedded system?
256. What is the purpose of a microcontroller in an embedded system?
257. What is the difference between an embedded system and a general-purpose computer?
258. What is the purpose of an interrupt in a computer system?
259. What is the difference between a hard real-time system and a soft real-time system?
260. What is the purpose of a timer in an embedded system?
261. What is the difference between a microprocessor and a microcontroller?
262. What is the purpose of a watchdog timer in an embedded system?
263. What is the purpose of an ADC (analog-to-digital converter) in an embedded system?
264. What is the purpose of a DMA (direct memory access) controller in a computer system?
265. What is the purpose of a bus in a computer system?
266. What is the difference between a serial bus and a parallel bus?
267. What is the purpose of a multiplexer (MUX) in a computer system?
268. What is the purpose of a demultiplexer (DEMUX) in a computer system?
269. What is the purpose of a decoder in a computer system?
270. What is the purpose of a ROM (read-only memory) in a computer system?
271. What is the function of an Arithmetic and Logic Unit (ALU)?
272. What is an instruction format in a computer system?
273. What is an addressing mode in a computer system?
274. What is the purpose of a data transfer instruction in a computer system?
275. What is the purpose of a data manipulation instruction in a computer system?
276. What is the difference between a load instruction and a store instruction in a computer system?
277. What is an immediate addressing mode?
278. What is a register indirect addressing mode?
279. What is a base relative addressing mode?
280. What is an indexed addressing mode?
281. What is a stack addressing mode?
282. What is the purpose of a rotate instruction in a computer system?
283. What is the purpose of a shift instruction in a computer system?
284. What is the purpose of a compare instruction in a computer system?
285. What is the purpose of a branch instruction in a computer system?
286. What is the purpose of a jump instruction in a computer system?
287. What is the purpose of a call instruction in a computer system?
288. What is the purpose of a return instruction in a computer system?
289. What is the purpose of a load effective address (LEA) instruction in a computer system?
290. What is the purpose of a clear instruction in a computer system?
291. What is the purpose of a memory hierarchy?
292. Which of the following is an example of internal memory?
293. Which of the following is an example of external memory?
294. What is the purpose of cache memory?
295. Which of the following is true about cache memory?
296. Which type of cache memory is integrated into the CPU?
297. Which type of cache memory is the largest in size?
298. Which type of memory is used to provide a bridge between main memory and secondary storage devices?
299. Which of the following is an advantage of using virtual memory?
261. Content of the program counter is added to the address part of the instruction in order to obtain the effective address is called:
262. An interface that provides I/O transfer of data directly to and from the memory unit and peripheral is termed as:
263. The 2's complement form (Use 6-bit word) of the number is:
264. A register capable of shifting its binary information either to the right or the left is called a:
265. What is the content of stack pointer (SP)?
266. Which of the following interrupt is non-maskable?
267. Which of the following is a main memory?
268. Which of the following are not a machine instruction?
269. In Assembly language programming, minimum number of operands required for an instruction is/are:
270. The maximum addressing capacity of a microprocessor which uses 16-bit database & 32-bit address base is:
271. A combinational logic circuit which sends data coming from a single source to two or more separate destinations is:
272. A Program Counter contains a number 825 and address part of the instruction contains the number 24. The effective address in the relative address mode, when an instruction is read from the memory is:
273. A system program that translates and executes an instruction simultaneously is:
274. The cache memory of 1K words uses direct mapping with a block size of 4 words. How many blocks can the cache accommodate?
275. Logic gates with a set of input and outputs is arrangement of:
276. The BSA instruction is:
277. A floating-point number that has an O in the MSB of mantissa is said to have:
278. Aging registers are:
279. The instruction “ORG O” is a:
280. Translation from symbolic program into binary is done in:
281. To put the microprocessor in the wait state:
282. A basic instruction that can be interpreted by a computer generally has:
283. In a microprocessor system with memory mapped I/O:
284. Which of the following information holds the information before going to the decoder?
285. The device which is used to connect a peripheral to bus is called:
286. Which of the following is the set of general-purpose internal registers?
287. The register used as a working area in CPU is:
288. Which of the following is used as storage location both in the ALU and the control section of a computer?
289. The register which holds the address of the location to or from which data are to be transferred is called:
290. The register which contains the data to be written into or read out of the address location is called:
291. Which of the following register is used in the control unit of the CPU to indicate the next instruction which is to be executed?
292. An interrupt can be temporarily ignored by counter is called:
293. The ability to temporarily halt the CPU and used this time to send information on buses is called:
294. Number of machine cycle required for RET instruction in 8085 micro-processors is:
295. In a microprocessor system, the RST instruction will cause an interrupt:
296. An instruction used to set the carry flag in a computer can be classified as:
297. Microprocessor 8085 is the enhanced version of ______ with essentially the same construction set.
298. In a generic microprocessor instruction cycle time is:
299. If we use 3 bits in the instruction word to indicate if an index register is to be used and if necessary, which one is to be used, and then the number of index register to be used in the machine will be:
300. In a multi-processor configuration, two processor are connected to the host 8086 processor. The two-co-processor instruction set:
301. A certain processor supports only the immediate and the direct addressing modes. Which of the following programming language features cannot be implemented on this pointer?
302. The 8085 microprocessor responds to the presence of an interrupt:
303. Which of the following need not necessarily be saved on a context switch between processes?
304. If a processor does not have any stack pointer register then:
305. CPU has two modes-privileged and non-privileged. In order to change the mode from privileged to non-privileged:
306. In the absolute addressing mode:
307. The capacity of program counter (PC) is:
308. The function of program counter (PC) holds:
309. The Program Counter (PC):
310. The TRAP interrupt mechanism of the 8085 microprocessor executes:
311. Pseudo-instructions are:
312. “The number of instructions needed to add ‘n’ numbers and store the result in memory using only one address instructions is:
313. The addressing mode used in the instruction PUSH B is:
314. The process of fetching and executing instructions one at a time, in order to increasing an address is called:
315. The CPU of a computer takes instruction from the memory and executes them. This process is called:
316. In a microprocessor, WAIT states are used to:
317. When a program is being executed in an 8085 microprocessor, its program counter contains:
318. When the HLT instructions of an 8085 microprocessor is executed, the microprocessor:
319. Serial input data of 8085 can be loaded into bit 7 of the accumulator by:
320. Which of the following interrupts are unmaskable interrupts?
321. The memory address ranges to which RAM will respond:
322. The address range to which I/O chip will respond is:
323. Both the arithmetic logic unit (ALU) and control section of CPU employ special purpose storage location called:
324. A basic instruction that can be interpreted by a computer generally has:
325. The differences between PLA and ROM is:
326. The control unit of computer:
327. The ALU of a computer normally contains a number of high-speed storage elements called:
328. The unit of a computer system which executes program, communication with and often controls the operation of other subsystems of the computer is the:
329. The ability of a medium size computer system to increase in data processing capability by addition of such devices as mass storage device, I/O device etc. is called:
330. The technique which repeatedly uses the same block of internal storage during different stage of problem is called:
331. The registers used as a working area in CPU is:
332. Which of the following information holds the information before going to the decoder?
333. Which of the following unit is used to supervise each instruction in the CPU?
334. The bus which is used to transfer data from main memory to peripheral device is:
335. The device which is used to connect a peripheral to bus is called:
336. The bus connected between the CPU and main memory that permits transfer of information between main memory and the CPU is called:
337. What is the storage capacity of a Hollerith card which is organized into nibbles?
338. How many addresses are required for 25x40 video RAM?
339. Microprogramming is a technique for:
340. A device that works in conjunction with a computer but not as part of it is called:
341. A system of letters, numbers symbols adopted by computer manufacture as an abbreviation form of instruction sets is called
342. When a subroutine is called, then address of the instruction following the CALL instruction is stored in/on the
343. In 8085 microprocessors, the value of the most significant bit of the result following the execution of any arithmetic or Boolean instruction is stored in the
344. PLA
345. The sequence of events that happen during a typical fetch operation is
346. Which of the following is not a form of memory?
347. Which memory is difficult to interface with processor?
348. Desirable characteristic(s) of a memory system is(are)
349. The minimum time delay required between initiation of two successive memory operation is called
350. Which of the following statement is wrong?
351. The refreshing rate of dynamic RAMs is approximately once in:
352. In comparison with static RAM memory, the dynamic RAM memory has:
353. Disadvantage of dynamic RAM over static RAM is:
354. The access time of magnetic bubble memory is approximately:
355. Serial access memories are useful in applications where:
356. What is the main advantage of magnetic core memory over semiconductor RAM memory?
357. Fastest types of memory from the following list is:
358. The use of hardware in Memory management is through segment relocation and protection is:
359. Memory refreshing may be done:
360. Choose the correct statement from the following:
361. Which of the following is not true of primary storage?
362. A dynamic RAM consists up:
363. Semiconductor memory is:
364. Which of the following is the internal memory of the system (computer)?
365. A software program stored in a ROM that cannot be changed easily is called:
366. An advantage of memory interfacing is that:
367. In a virtual memory system, the address space specified by the address line of the CPU must be ______ than the physical memory size and ______ than the secondary storage size.
368. Which of the following is /are advantage of virtual memory?
369. Which of the following need extra hardware for DRAM refreshing?
371. Memory consisting of electronic circuit attached into silicon chip is known as:
372. Which of the following memory is capable of operating at electronic speed?
373. The larger the RAM of a computer, the faster is its speed, since it eliminates
374. What is the average access time for a drum rotating at 4000 revolution per minute?
375. How many input lines are needed to construct 1024-bit coincident 'core plan?'
376. What is the byte capacity of a drum which is 5-inch-high, 10-inch diameter, and which has 60 tracks per inch bit density of 800 bits per inch?
377. The main advantage of multiple bus organization over single bus is,
378. Property of locality of reference may fail, if a program has
379. How many RAM chips of size (256x1 bit) are required to build 1M byte memory?
380. If each address space represents one byte of storage space, how many address lines are needed to access RAM chips arranged in a 4x6 array, where each chip is 8K x 4 bits?
381. Four memory chips of 16x4 size have their address bases connected together. The system will be of size
382. Arrange the following configurations for CPU in decreasing order or operating speeds:
383. The main difference (a) between a CISC and a RISC processor is/are that a RISC processor typically
384. Comparing the time T1 taken for a single instruction on a pipelined CPU with time T2 taken on a non-pipelined but identical CPU, we can say that
385. Performance of a pipelined processor suffers if
386. A micro-programmed control unit
387. Which of the following are typical characteristics of a RISC machine?
388. In an 8085-microprocessor system with memory mapped I/O
389. How many types of storage loops exist in magnetic bubble memory?
390. How many wires are threaded through the cores in a coincident current core memory?
391. When we move from the outermost track to the innermost track in a magnetic disk, then density (bits per liner inch)
392. The use of hardware in Memory management is through segment relocation and protection is
393. The parallel operation is preferred because
394. In comparison to the internal (main) memory, tape or disk memory is
395. The number of records contained within a block of data on magnetic tape is defined by the
396. Transfer of information from main storage is typically n times faster than the transfer form auxiliary storage, where n is about
397. Which access method is used for obtaining a record form a cassette tape?
398. An advantage of blocking a tape is that
399. The ISA standard Buses are used to connect,
400. Which of the following is not true of primary storage?
401. In modern computers bipolar semiconductor chips are often used in the arithmetic logic unit. What material is used for the slower and less expensive primary storage section?
402. Which type of memory chips are likely to be used in the primary storage of the future generation of computers?
403. How many bits can be stored in the 8K capital?
404. If a computer has a 1024 K memory, then what does the letter K stands for?
405. What was the amount of memory required by the earliest operating system called dos 1.0?
406. The storage device which is used to compensate for the difference in rates of flow of data from one device to another is called
407. As a secondary storage medium, what is the most important advantage of a video disk?
408. What is the size of optical compact disk which is used for recording high quality music?
409. Which part of the diskette never be touched?
410. Memory is
411. Virtual memory
412. AROM is used to store the table for multiplication of two 8 -bit unsigned integers. The size of ROM required is
413. The controller uses ______ to help with the transfers when handling network interfaces.
414. To overcome the conflict over the possession of the BUS we use ______.
415. The seek time of a disk is 30 ms. It rotates at the rate of 30 rotations/second. The capacity of each track is 300 words. The access time is (approximately)
416. How many RAM chips of size (256K x 1 bit) are required to build 1 M byte memory?
417. If each address space represents one byte of storage space, how many address lines are needed to access RAM chips arranged in a 4 x 6 array, where each chip is 8K x 4 bits?
418. In a memory system, four 256 x 8 PROM chips are used to make total memory of size 1024 x 4. What is the number of address bus lines?
419. Consider a high speed 40 ns memory cache with a successful hit ratio of 80%. The regular memory has an access time of 100 ns. What is the average effective time for CPU to access memory?
420. What is the hit ratio of a cache if a system performs memory access at 30 nano seconds with the cache and 150 nano seconds without it? Assume that the each uses 20 nano sec memory, choose the closest approximate
421. Consider a disk with the following characteristics
422. Increasing the RAM of a computer typically improves the performance because:
423. Which of the following requires a device driver?
424. Which one of the following statements is false?
425. The advantage of CMOS technology over a MOS is
426. The advantage of synchronous circuits over asynchronous one is...
427. Which of the following is not a form of memory?
428. In 2's complement, addition overflow
429. The performance of the pipelined processor suffers if...
430. In absolute addressing mode...
431. A processor needs software interrupt to
432. Horizontal microprogramming...
433. The main difference (s) between a CISC and RISC processor is/are that a RISC processor typically has
434. The exponent of a floating-point number is represented in excess -N code so that
435. If negative numbers are stored in 2's complement form, the range of numbers that can be stored in 8 bits is......
436. On receiving an interrupt from an I/O device, the CPU
437. In serial communication, an extra clock is needed
438. Which of the following rules regarding the addition of 2 given numbers is correct, if negative numbers are represented in 2's complement form?
439. The difference between 80486 and 80386 is/are...
440. In virtual memory system, the addresses used by the programmer belongs to
441. The method for updating the main memory as soon as word is removed from the cache is called
442. Which is true for a typical RISC architecture?
443. After reset, CPU begins execution of instruction from memory address
444. In 8085 microprocessors how many I/O devices can be interfaced in I/O mapped I/O technique?
445. DMA interface unit eliminates the need to use CPU registers to transfer data from
446. How many 128 x 8 RAM chips are needed to provide a memory capacity of 2048 bytes?
447. What is the bit storage capacity of a ROM with a 512 x 4-organization?
448. How many different addresses are required by the memories that contain 16K words?
449. The content of a 4-bit register is initially 1101. The register is shifted 2 times to the right with the serial input being 1011101. What is the content of the register after each shift?
450. ABCD - seven segment decoder / driver in connected to an LED display. Which segments are illuminated for the input code DCBA = 0001?
451. Address symbol table is generated by
452. When an instruction is read from the memory, it is called
453. Which activity does not take place during execution cycle?
454. The time for which the D-input of a D-FF must not change after the clock is applied is known as
455. How many memory chips of (128 x 8) are needed to provide a memory capacity of 4096 x 16?
456. In addition of two signed numbers, represented in 2's complement form generates an overflow if
457. In DMA the data transfer is controlled by...
458. Synchronous means...
459. Excess-3 equivalent representation of (1234) H is
460. Which of the memory holds the information when the Power Supply is switched off?
461. Minimum no. of NAND gate required implementing an Ex-OR function is
462. Which of the following expression is not equivalent to x?
463. BCD equivalent of Two's complement is
464. Associative memory is sometimes called as...
465. When CPU is not fully loaded, which of the following method of data transfer is preferred?
466. 8085 microprocessor carryout the subtraction by
467. PAL circuit consists of
468. CPU checks for an interrupt signal during
469. Which of the following is not a characteristic of RISC architecture......?
470. Memory interleaving technique is used to address the memory modules in order to have
471. In a multiprogramming system, which of the following is used?
472. Cycle stealing technique is used in
473. During DMA acknowledge cycle, CPU relinquishes
474. If the stack pointer is initialized with (4FEB) H, then after execution of Push operation in 8085 microprocessors, the Stack Pointer shall be
475. A more efficient way to organize a Page Table is by means of an associative memory having
476. If there are four ROM ICs of 8K and two RAM ICs of 4K words, then the address range of 1st RAM is (Assume initial addresses correspond to ROMs)
477. A.B.C is equal to A B C for
478. Gray code equivalent of (1000)2 is
479. The memory blocks are mapped on to the cache with the help of......
480. During a write operation if the required block is not present in the cache then...... occurs
481. In...... protocol the information is directly written into main....
482. The method of mapping the consecutive memory blocks to consecutive cache blocks is called....
483. While using the direct mapping technique, in a 16-bit system the higher order 5 bits is used for....
484. The technique of searching for a block by going through all tags is......
485. In case of Zero-address instruction method the operands are stored in....
486. The addressing mode which makes use of in-direction pointer is......
487. The addressing mode, where you directly specify the operand value is
488. ...addressing mode is most suitable to change the normal sequence of execution of instructions.
489. The pipelining process is also called as....
490. The fetch and execution cycles are interleaved with the help of......
491. The situation where in the data of operands are not available is called...
492. The reason for the implementation of the cache memory is
493. The effectiveness of the cache memory is based on the property of ______.
494. The temporal aspect of the locality of reference means
495. The spatial aspect of the locality of reference means
496. The algorithm to remove and place new contents into the cache is called ______.
497. The key factor/s in commercial success of a computer is/are......
498. The main objective of the computer system is
499. A common measure of performance is:
500. The main purpose of having memory hierarchy is to
501. Who developed the basic architecture of computer?
502. Which of the following allows simultaneous write and read operations?
503. Which of the following is not considered as a peripheral device?
504. Which of the following computer memory is fastest?
505. Which of the following operations is/are performed by the ALU?
506. Which of the following format is used to store data?
507. Which of the following memory of the computer is used to speed up the computer processing?
508. Computer address, bus is -
509. Which of the following circuit is used to store one bit of data?
510. Which of the following is a way in which the components of a computer are connected to each other?
511. Which of the following circuit convert the binary data into a decimal?
512. The address in the main memory is known as -
513. Subtraction in computers is carried out by -
514. Which of the following computer bus connects the CPU to a memory on the system board?
515. Which of the following memory unit communicates directly with the CPU?
516. The collection of 8-bits is called as -
517. Which of the following register can interact with the secondary storage?
518. In which of the following form the computer stores its data in memory?
519. Which of the following is a combinational logic circuit which sends data from a single source to two or more separate destinations?
520. Which of the following is a group of bits that tells the computer to perform a particular operation?
521. Where is the document temporarily stored during working on a document on PC?
522. Where is the decoded instruction stored?
523. What does MIMD stand for?
524. The status bit is also called as -
525. Which of the following register keeps track of the instructions stored in the program stored in memory?
526. The Program Counter is also called as
527. Which of the following topology is used in Ethernet?
528. Which of the following is correct about memory and storage?
529. Which of the following is equal to 4 bits?
530. What does one thousand bytes represent?
531. What is the content of stack pointer (SP)?
532. An n-bit microprocessor has -
533. Which of the following is the operation executed on data stored in registers?
534. What does a computer bus line consist of?
535. Which of the following is performed by half adder?
536. Which of the following is a combinational logic circuit which converts binary information from n coded inputs to a maximum of 2n unique outputs?
537. Which of the following is a combinational logic circuit that change the binary information into N output lines?
538. Which of the following is a combinational logic circuit that has 2^n input lines and a single output line?
539. Which of the following building block can be used to implement any combinational logic circuit?
540. Which of the following is the circuit board on which chips and processor are placed?
541. Which of the following computer register collects the result of computation?
542. CISC stands for -
543. Which of the following is the function of the control unit in the CPU?
544. What does EEPROM stands for?
545. In which of the following term the performance of cache memory is measured?
546. RISC stands for -
547. Which of the following is an essential data transfer technique?
548. Which of the following is page fault?
549. What does DRAM stand for?
550. Which of the following is known as the step by step procedure to solve a problem?
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