351. The refreshing rate of dynamic RAMs is approximately once in:
Two microseconds
Fifty milliseconds
Two milliseconds
Two seconds
Show me the answer
Answer: 3. Two milliseconds
Explanation:
Dynamic RAMs (DRAMs) require refreshing approximately every 2 milliseconds to retain data.
352. In comparison with static RAM memory, the dynamic RAM memory has:
Lower bit density and higher power consumption
Higher bit density and higher power consumption
Lower bit density and lower power consumption
Higher bit density and lower power consumption
Show me the answer
Answer: 4. Higher bit density and lower power consumption
Explanation:
DRAM has higher bit density and consumes less power compared to SRAM.
353. Disadvantage of dynamic RAM over static RAM is:
Higher power consumption
Variable speed
Need to refresh the capacitor charge every once in two milliseconds
Higher bit density
Show me the answer
Answer: 3. Need to refresh the capacitor charge every once in two milliseconds
Explanation:
DRAM requires periodic refreshing, which is a disadvantage compared to SRAM.
354. The access time of magnetic bubble memory is approximately:
30 nanoseconds
30 milliseconds
30 microseconds
0.3 seconds
Show me the answer
Answer: 3. 30 microseconds
Explanation:
Magnetic bubble memory has an access time of approximately 30 microseconds.
355. Serial access memories are useful in applications where:
Data consists of numbers
Short access time is required
Each stored word is processed differently
Data naturally needs to flow in and out in serial form
Show me the answer
Answer: 4. Data naturally needs to flow in and out in serial form
Explanation:
Serial access memories are used when data flows in and out serially, such as in shift registers.
356. What is the main advantage of magnetic core memory over semiconductor RAM memory?
More compact and smaller
More economical
A bit does not have to be written after reading
Non-volatile
Show me the answer
Answer: 4. Non-volatile
Explanation:
Magnetic core memory is non-volatile, meaning it retains data even when power is lost.
357. Fastest types of memory from the following list is:
Tape
Disk
Semiconductor
Bubble memory
Show me the answer
Answer: 3. Semiconductor
Explanation:
Semiconductor memory (e.g., SRAM, DRAM) is the fastest among the listed options.
358. The use of hardware in Memory management is through segment relocation and protection is:
To perform address translation to reduce size of the memory
To perform address translation to reduce execution time overhead
Both A and B
None of these
Show me the answer
Answer: 3. Both A and B
Explanation:
Segment relocation and protection help in address translation and reduce execution time overhead.
359. Memory refreshing may be done:
By the CPU that contains a spec regress counter, only
By an external refresh counter, only
Either by CPU or by an extern refresh counter
None of the above
Show me the answer
Answer: 3. Either by CPU or by an extern refresh counter
Explanation:
Memory refreshing can be handled by the CPU or an external refresh counter.
360. Choose the correct statement from the following:
PROM contains a programmable AND array and a fixed OR array
PLA contains a fixed AND array and a programmable OR array
PROM contains a fixed AND array and a programmable OR array
None of the above
Show me the answer
Answer: 3. PROM contains a fixed AND array and a programmable OR array
Explanation:
PROM (Programmable Read-Only Memory) has a fixed AND array and a programmable OR array.
361. Which of the following is not true of primary storage?
It represents the decimal number through string of binary digits
It stores operating system programs
It stores data while they are being processed by CPU
It stores the bulk of data used by computer application
Show me the answer
Answer: 4. It stores the bulk of data used by computer application
Explanation:
Primary storage (e.g., RAM) is used for temporary data storage, not for bulk data storage.
362. A dynamic RAM consists up:
Six transistors
One transistor and one capacitor
Two transistors and two capacitors
Two capacitors only
Show me the answer
Answer: 2. One transistor and one capacitor
Explanation:
DRAM cells consist of one transistor and one capacitor.
363. Semiconductor memory is:
Somewhat slower than magnetic core memory
A volatile memory
Somewhat longer than magnetic core memory
All of the above
Show me the answer
Answer: 2. A volatile memory
Explanation:
Semiconductor memory (e.g., RAM) is volatile, meaning it loses data when power is turned off.
364. Which of the following is the internal memory of the system (computer)?
CPU registers
Main memory
Cache memory
All of the above
Show me the answer
Answer: 4. All of the above
Explanation:
CPU registers, main memory, and cache memory are all part of the internal memory system.
365. A software program stored in a ROM that cannot be changed easily is called:
Hardware
Editor
Linker
Firmware
Show me the answer
Answer: 4. Firmware
Explanation:
Firmware is software embedded in ROM that cannot be easily changed.
366. An advantage of memory interfacing is that:
A large memory is obtained
Effective speed of the memory is increased
The cost of the memory is reduced
A non-volatile memory is obtained
Show me the answer
Answer: 2. Effective speed of the memory is increased
Explanation:
Memory interfacing improves the effective speed of memory access.
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.
Smaller, smaller
Larger, smaller
Smaller, larger
Larger, larger
Show me the answer
Answer: 2. Larger, smaller
Explanation:
Virtual memory allows the address space to be larger than physical memory but smaller than secondary storage.
368. Which of the following is /are advantage of virtual memory?
Faster access to memory on a average
Processes can be given protected address space
Both A and B
Program larger than the physical memory size can be run
Show me the answer
Answer: 3. Both A and B
Explanation:
Virtual memory provides faster access and protected address spaces for processes.
369. Which of the following need extra hardware for DRAM refreshing?
8085
Motorola 68000
Both (A) and (B)
None of the above
Show me the answer
Answer: 3. Both (A) and (B)
Explanation:
Both the 8085 and Motorola 68000 require extra hardware for DRAM refreshing.
371. Memory consisting of electronic circuit attached into silicon chip is known as:
Magnetic core memory
Thin film memory
Semiconductor memory
MOS memory
Show me the answer
Answer: 3. Semiconductor memory
Explanation:
Semiconductor memory is made up of electronic circuits integrated into silicon chips, making it a key component in modern computing.
372. Which of the following memory is capable of operating at electronic speed?
Semiconductor memory
Magnetic drums
Magnetic disks
Magnetic tapes
Show me the answer
Answer: 1. Semiconductor memory
Explanation:
Semiconductor memory operates at electronic speeds, making it much faster than magnetic storage devices like drums, disks, or tapes.
373. The larger the RAM of a computer, the faster is its speed, since it eliminates
Need of ROM
Frequency disk I/O
Need for external memory
Need for a data-wide path
Show me the answer
Answer: 2. Frequency disk I/O
Explanation:
Larger RAM reduces the need for frequent disk I/O operations, which are slower compared to accessing data directly from RAM.
374. What is the average access time for a drum rotating at 4000 revolution per minute?
2.5 milli seconds
7.5 milli seconds
5.0 milli seconds
4.0 milli seconds
Show me the answer
Answer: 1. 2.5 milli seconds
Explanation:
The average access time for a drum rotating at 4000 RPM is calculated as half the time for one full rotation, which is 2.5 milliseconds.
375. How many input lines are needed to construct 1024-bit coincident 'core plan?'
10
32
16
64
Show me the answer
Answer: 4. 64
Explanation:
To construct a 1024-bit coincident core plane, 64 input lines are needed (since 1024 = 2^10, and 64 = 2^6).
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?
942000 bytes
188400 bytes
471000 bytes
16384 bytes
Show me the answer
Answer: 3. 471000 bytes
Explanation:
The byte capacity is calculated by multiplying the number of tracks, bits per track, and converting bits to bytes. The drum has 60 tracks per inch, 800 bits per inch, and a circumference of 10 inches, resulting in 471000 bytes.
377. The main advantage of multiple bus organization over single bus is,
Reduction in the number of cycles for execution
Increase in size of the registers
Better Connectivity
None of these
Show me the answer
Answer: 1. Reduction in the number of cycles for execution
Explanation:
Multiple bus organization allows parallel data transfer, reducing the number of cycles needed for execution compared to a single bus system.
378. Property of locality of reference may fail, if a program has
Many conditional jumps
Many operands
Many unconditional jumps
All of the above
Show me the answer
Answer: 4. All of the above
Explanation:
Locality of reference may fail if a program has many conditional jumps, operands, or unconditional jumps, as these can disrupt the predictable access patterns.
379. How many RAM chips of size (256x1 bit) are required to build 1M byte memory?
8
24
10
32
Show me theanswer
Answer: 4. 32
Explanation:
To build 1M byte memory using 256x1 bit chips, you need 32 chips (1M byte = 8M bits, and 256x1 bit chips provide 256 bits each, so 8M / 256 = 32).
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?
13
16
15
17
Show me the answer
Answer: 4. 17
Explanation:
Each chip is 8K x 4 bits, so 8K = 8192 bytes. For a 4x6 array, the total memory is 4 * 6 * 8192 = 196608 bytes. To address this, you need 17 address lines (2^17 = 131072, which is sufficient).
381. Four memory chips of 16x4 size have their address bases connected together. The system will be of size
64x64
32x8
16x16
256x1
Show me the answer
Answer: 3. 16x16
Explanation:
Four 16x4 chips connected together result in a 16x16 system, as the address bases are shared, and the data width is increased.
382. Arrange the following configurations for CPU in decreasing order or operating speeds:
Hard wired control, vertical micro-programming, horizontal micro-programming
Hard wired control, horizontal micro-programming, vertical micro-programming
Horizontal micro-programming, vertical micro-programming, hard wired control
Vertical micro-programming, horizontal micro-programming, hard wired control
Show me the answer
Answer: 2. Hard wired control, horizontal micro-programming, vertical micro-programming
Explanation:
Hardwired control is the fastest, followed by horizontal micro-programming, and then vertical micro-programming, which is the slowest.
383. The main difference (a) between a CISC and a RISC processor is/are that a RISC processor typically
Has fewer instructions and addressing modes
Has more registers
Is easier to implements using hard-wired control logic
All of the above
Show me the answer
Answer: 4. All of the above
Explanation:
RISC processors typically have fewer instructions, more registers, and are easier to implement using hard-wired control logic compared to CISC processors.
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
T1=T2
T1>T2
T1<T2
T1 is T2 plus time taken for one instruction fetch cycle
Show me the answer
Answer: 3. T1<T2
Explanation:
Pipelining allows multiple instructions to be processed simultaneously, reducing the time taken for a single instruction compared to a non-pipelined CPU.
385. Performance of a pipelined processor suffers if
The pipeline stages have different delays
Consecutive instructions are dependent on each other
The pipeline stages share hardware resources
All of the above
Show me the answer
Answer: 4. All of the above
Explanation:
Pipeline performance suffers if stages have different delays, instructions are dependent, or stages share hardware resources, leading to stalls or bottlenecks.
386. A micro-programmed control unit
Is faster than a hard-wired control unit
Facilitates easy implementation of new instruction
Is useful when very small programs are to be run
Usually refers to the control unit of a microprocessor
Show me the answer
Answer: 2. Facilitates easy implementation of new instruction
Explanation:
A micro-programmed control unit allows for easier implementation of new instructions compared to hard-wired control units, as it uses software to define control logic.
387. Which of the following are typical characteristics of a RISC machine?
Highly pipelined
Multiple register sets
Both (A) and (B)
None of these
Show me the answer
Answer: 3. Both (A) and (B)
Explanation:
RISC machines are typically highly pipelined and have multiple register sets to improve performance and efficiency.
388. In an 8085-microprocessor system with memory mapped I/O
I/O device have 8-bit addresses
I/O devices are accessed using IN and OUT instruction
There can be a maximum of 256 input devices and 256 output devices
Arithmetic and logic operations can be directly performed with the I/O data
Show me the answer
Answer: 4. Arithmetic and logic operations can be directly performed with the I/O data
Explanation:
In memory-mapped I/O, I/O devices are treated like memory locations, allowing arithmetic and logic operations to be performed directly on I/O data.
389. How many types of storage loops exist in magnetic bubble memory?
8
3
4
2
Show me the answer
Answer: 4. 2
Explanation:
Magnetic bubble memory typically uses two types of storage loops: major loops and minor loops.
390. How many wires are threaded through the cores in a coincident current core memory?
2
4
3
6
Show me the answer
Answer: 1. 2
Explanation:
Coincident current core memory uses two wires threaded through the cores: one for the X-axis and one for the Y-axis.
391. When we move from the outermost track to the innermost track in a magnetic disk, then density (bits per liner inch)
Increases
Remains the same
Decreases
Either remains constant or decreases
Show me the answer
Answer: 1. Increases
Explanation:
As we move from the outermost track to the innermost track on a magnetic disk, the bit density (bits per linear inch) increases due to the smaller circumference of the inner tracks.
392. The use of hardware in Memory management is through segment relocation and protection is
To perform address translation to reduce size of the memory
To perform address translation to reduce execution time overhead
Both A and B
None of the above
Show me the answer
Answer: 3. Both A and B
Explanation:
Hardware in memory management is used for segment relocation and protection to perform address translation, which reduces memory size and execution time overhead.
393. The parallel operation is preferred because
Circuitry is simple
It is faster than series operation
It requires less memory
All of the above
Show me the answer
Answer: 2. It is faster than series operation
Explanation:
Parallel operation is preferred because it allows multiple operations to be performed simultaneously, making it faster than serial operation.
394. In comparison to the internal (main) memory, tape or disk memory is
Slower and more expensive
Faster and more expensive
Slower and less expensive
Faster and less expensive
Show me the answer
Answer: 3. Slower and less expensive
Explanation:
Tape or disk memory is slower than internal (main) memory but is less expensive, making it suitable for bulk storage.
395. The number of records contained within a block of data on magnetic tape is defined by the
Block definition
Blocking factor
Record contain clause
Record per block factor
Show me the answer
Answer: 2. Blocking factor
Explanation:
The blocking factor defines the number of records contained within a block of data on magnetic tape.
396. Transfer of information from main storage is typically n times faster than the transfer form auxiliary storage, where n is about
5
100
10
200
Show me the answer
Answer: 2. 100
Explanation:
Transfer of information from main storage is typically about 100 times faster than from auxiliary storage due to the speed difference between RAM and disk storage.
397. Which access method is used for obtaining a record form a cassette tape?
Direct
Random
Sequential
Parallel
Show me the answer
Answer: 3. Sequential
Explanation:
Cassette tapes use sequential access, meaning data must be read in the order it is stored on the tape.
398. An advantage of blocking a tape is that
The additional processing time is consumed
The direct file method can be emulated
The tapes contains less data and longer tapes
Less tape is used to store the same amount of data
Show me the answer
Answer: 4. Less tape is used to store the same amount of data
Explanation:
Blocking a tape reduces the amount of tape used to store the same amount of data by grouping records into blocks, reducing overhead.
399. The ISA standard Buses are used to connect,
RAM and processor
Hard disk and Processor
GPU and processor
CD/DVD drives and Processor
Show me the answer
Answer: 1. RAM and processor
Explanation:
ISA (Industry Standard Architecture) buses are primarily used to connect RAM and the processor in older computer systems.
400. Which of the following is not true of primary storage?
It represents the decimal number through string of binary digits.
It stores operating system programs
It stores data while they are being processed by CPU.
It stores the bulk of data used by computer application
Show me the answer
Answer: 4. It stores the bulk of data used by computer application
Explanation:
Primary storage (RAM) is used for temporary data storage while the CPU processes it, but it does not store the bulk of data used by applications, which is typically stored in secondary storage.
