301. Most of the microcomputer’s operating systems like Apple DOS, MS DOS, and PC DOS, etc., are called disk operating systems because:
They are memory resident
They are initially stored on disk
They are available on magnetic tapes
They are partly in primary memory and partly on disk
Show me the answer
Answer: 2. They are initially stored on disk
Explanation:
Disk Operating Systems: Disk operating systems (DOS) are called so because they are stored on disk and loaded into memory during system startup.
Conclusion: DOS systems are initially stored on disk.
302. When did IBM release the first version of the disk operating system DOS version 1.0?
1981
1983
1982
1984
Show me the answer
Answer: 1. 1981
Explanation:
DOS 1.0 Release: IBM released the first version of DOS (PC-DOS 1.0) in 1981 for the IBM PC.
Conclusion: DOS 1.0 was released in 1981.
303. IBM released its first PC in 1981. Can you name the operating system which was most popular at that time?
MS-DOS
OS/360
PC-DOS
CP/M
Show me the answer
Answer: 4. CP/M
Explanation:
Popular OS in 1981: CP/M (Control Program for Microcomputers) was the most popular operating system for microcomputers in 1981.
Conclusion: CP/M was the most popular OS at that time.
304. Page fault frequency in an operating system is reduced when the:
Size of pages is reduced
Processes tend to be I/O-bound
Processes tend to be CPU-bound
Locality of reference is applicable to the process
Show me the answer
Answer: 4. Locality of reference is applicable to the process
Explanation:
Page Fault Frequency: Page fault frequency is reduced when processes exhibit strong locality of reference, meaning they access the same set of memory locations repeatedly.
Conclusion: Locality of reference reduces page fault frequency.
305. Which of the following is true for testing and debugging?
Testing checks for logical errors in the programs while debugging is a process of correcting those errors in the programs
Testing detects the syntax errors in the program while debugging corrects those errors in the program
Testing and debugging indicate the same thing
All of the above
Show me the answer
Answer: 1. Testing checks for logical errors in the programs while debugging is a process of correcting those errors in the programs
Explanation:
Testing vs Debugging: Testing involves identifying errors in a program, while debugging involves correcting those errors.
Conclusion: Testing and debugging are distinct but related processes.
306. If special forms are needed for printing the output, the programmer specifies these forms through:
JCL
Utility program
IPL
Load modules
Show me the answer
Answer: 1. JCL
Explanation:
JCL (Job Control Language): JCL is used to specify special forms or requirements for printing output in batch processing systems.
Conclusion: JCL is used to specify printing forms.
307. Under multiprogramming, turnaround time for short jobs is usually...... and for long jobs is slightly......
Lengthened; shortened
Shortened; shortened
Shortened; lengthened
Lengthened; lengthened
Show me the answer
Answer: 3. Shortened; lengthened
Explanation:
Turnaround Time: In multiprogramming, short jobs are executed quickly, reducing their turnaround time. Long jobs may experience slightly longer turnaround times due to resource sharing.
Conclusion: Turnaround time is shortened for short jobs and lengthened for long jobs.
308. The state transition initiated by the user process itself in an operating system is:
Block
Wake up
Dispatch
Timer run out
Show me the answer
Answer: 1. Block
Explanation:
State Transition: A process can transition to the Blocked state when it requests an I/O operation or waits for an event. This transition is initiated by the process itself.
Conclusion: The Block state transition is user-initiated.
309. Which of the following terms refers to the degree to which data in a database system are accurate and correct?
Data security
Data independence
Data validity
Data integrity
Show me the answer
Answer: 4. Data integrity
Explanation:
Data Integrity: Data integrity refers to the accuracy and consistency of data in a database system.
Conclusion: Data integrity ensures data accuracy and correctness.
310. The total time to prepare a disk drive mechanism for a block of data to be read from it is:
Latency
Latency plus transmission time
Latency plus seek time
Latency plus seek time plus transmission time
Show me the answer
Answer: 3. Latency plus seek time
Explanation:
Disk Access Time: The total time to prepare a disk drive for reading data includes seek time (time to move the disk arm to the correct track) and latency (time for the disk to rotate to the correct sector).
Conclusion: The total preparation time is latency plus seek time.
311. Indicate whether the statement LDA B is a statement in:
Machine language
High-level language
Assembly language
All of the above
Show me the answer
Answer: 3. Assembly language
Explanation:
LDA B: LDA (Load Accumulator) is a mnemonic used in assembly language to load data into the accumulator.
Conclusion: LDA B is an assembly language statement.
312. Indicate which describes the term “software”:
Systems programs only
Both A and B
Application programs only
All of the printer
Show me the answer
Answer: 2. Both A and B
Explanation:
Software: Software includes both system programs (e.g., operating systems) and application programs (e.g., word processors).
Conclusion: Software encompasses both system and application programs.
313. Bug means:
A logical error in a program
A difficult syntax error in a program
Documenting programs using an efficient documentation tool
All of the above
Show me the answer
Answer: 1. A logical error in a program
Explanation:
Bug: A bug refers to a logical error in a program that causes it to behave incorrectly.
Conclusion: Bugs are logical errors in programs.
314. A development strategy whereby the executive control modules of a system are coded and tested first is known as:
Bottom-up development
Left-Right development
Top-down development
All of the above
Show me the answer
Answer: 3. Top-down development
Explanation:
Top-Down Development: In top-down development, high-level modules (e.g., executive control modules) are developed and tested first, followed by lower-level modules.
Conclusion: Top-down development starts with executive control modules.
315. Indicate which, of the following, is not true about Nassi-Shneiderman charts:
These charts are a type of graphical design tool
These charts cannot represent CASE constructs
These charts can represent three fundamental control structures
All of the above
Show me the answer
Answer: 2. These charts cannot represent CASE constructs
Explanation:
Nassi-Shneiderman Charts: These charts are graphical design tools that can represent fundamental control structures (e.g., sequence, selection, iteration) and CASE constructs.
Conclusion: Nassi-Shneiderman charts can represent CASE constructs.
316. Indicate which, of the following, is not true about a data flow diagram (DFD):
It is a graphical representation of the flow of data through the system
It is used to analyze any system or software at any level of abstraction
It is a very important tool, used by system analysts and designers
All of the above
Show me the answer
Answer: 4. All of the above
Explanation:
Data Flow Diagram (DFD): A DFD is a graphical tool used to represent the flow of data in a system. It is used at various levels of abstraction and is essential for system analysis and design.
Conclusion: All the statements about DFDs are true.
317. Which of the following checks cannot be carried out on the input data to a system?
Consistency check
Range checks
Syntax check
All of the above
Show me the answer
Answer: 4. All of the above
Explanation:
Input Data Checks: Consistency checks, range checks, and syntax checks are all valid methods for validating input data.
Conclusion: All the checks can be performed on input data.
318. Which of the following is not true about documentation?
Documentation of a system should be as clear and direct as possible
Documentation increases the maintenance time and cost
Documentation gives a better understanding of the problem
All of the above
Show me the answer
Answer: 2. Documentation increases the maintenance time and cost
Explanation:
Documentation: Proper documentation reduces maintenance time and cost by providing clear and direct information about the system.
Conclusion: Documentation does not increase maintenance time and cost.
319. C is:
An assembly language
A third-generation high-level language
A machine language
All of the above
Show me the answer
Answer: 2. A third-generation high-level language
Explanation:
C Language: C is a third-generation high-level programming language known for its efficiency and flexibility.
Conclusion: C is a high-level language.
320. Which of the following modules does not incorporate initialization of values changed by the module?
Non-reusable module
Reentrant module
Serially reusable module
All of the above
Show me the answer
Answer: 1. Non-reusable module
Explanation:
Non-Reusable Module: A non-reusable module does not incorporate initialization of values changed by the module, making it unsafe for reuse.
Conclusion: Non-reusable modules do not initialize changed values.
321. Which of the following statements is false?
A process scheduling algorithm is preemptive if the CPU can be forcibly removed from a process
Time-sharing systems generally use preemptive CPU scheduling
Response times are more predictable in preemptive systems than in non-preemptive systems
Real-time systems generally use non-preemptive CPU scheduling
Show me the answer
Answer: 4. Real-time systems generally use non-preemptive CPU scheduling
Explanation:
Real-Time Systems: Real-time systems typically use preemptive scheduling to ensure timely execution of critical tasks.
Conclusion: Real-time systems use preemptive scheduling, not non-preemptive.
322. Indicate which, of the following, is not true about an interpreter:
Interpreter generates an object program from the source program
Interpreter is a kind of translator
Interpreter analyzes each source statement every time it is to be executed
All of the above
Show me the answer
Answer: 1. Interpreter generates an object program from the source program
Explanation:
Interpreter: An interpreter executes source code directly without generating an object program. It analyzes and executes each statement at runtime.
Conclusion: Interpreters do not generate object programs.
323. Indicate which, of the following, is not true about 4GL:
4GL does not support a high level of screen interaction
Many database management system packages support 4GL
A 4GL is a software tool which is written possibly in some third-generation language
All of the above
Show me the answer
Answer: 1. 4GL does not support a high level of screen interaction
Explanation:
4GL (Fourth-Generation Language): 4GLs are designed for high-level programming and often support advanced screen interaction and database management.
Conclusion: 4GLs support a high level of screen interaction.
324. An algorithm is described as:
A computer language
A step-by-step procedure for solving a problem
A branch of mathematics
All of the above
Show me the answer
Answer: 2. A step-by-step procedure for solving a problem
Explanation:
Algorithm: An algorithm is a step-by-step procedure for solving a problem or performing a task.
Conclusion: Algorithms are problem-solving procedures.
325. A sequence of instructions, in a computer language, to get the desired result is known as:
Algorithm
Program
Decision table
All of the above
Show me the answer
Answer: 2. Program
Explanation:
Program: A program is a sequence of instructions written in a computer language to achieve a specific result.
Conclusion: A program is a sequence of instructions.
326. The strategy of allowing processes that are logically runnable to be temporarily suspended is called:
Preemptive scheduling
Shortest job first
Non-preemptive scheduling
First come first served
Show me the answer
Answer: 1. Preemptive scheduling
Explanation:
Preemptive Scheduling: Preemptive scheduling allows the operating system to suspend a running process and allocate the CPU to another process.
327. Part of a program where the shared memory is accessed and which should be executed indivisibly is called:
Semaphores
Critical section
Directory
Mutual exclusion
Show me the answer
Answer: 2. Critical section
Explanation:
Critical Section: The critical section is the part of a program where shared resources are accessed. It must be executed indivisibly to prevent race conditions.
Conclusion: The critical section is where shared memory is accessed.
328. The technique, for sharing the time of a computer among several jobs, which switches jobs so rapidly such that each job appears to have the computer to itself is:
Time sharing
Time domain
Time out
FIFO
Show me the answer
Answer: 1. Time sharing
Explanation:
Time Sharing: Time sharing allows multiple users to share a computer by rapidly switching between jobs, giving the illusion that each user has exclusive access.
Conclusion: Time sharing rapidly switches between jobs.
329. The operating system manages:
Memory
Disks and I/O devices
Processor
All of the above
Show me the answer
Answer: 4. All of the above
Explanation:
Operating System Functions: The operating system manages memory, disks, I/O devices, and the processor to ensure efficient system operation.
Conclusion: The operating system manages all the listed resources.
330. A form of code that uses more than one process and processor, possibly of different types, and that may on occasion have more than one process or processor active at the same time is known as:
Multiprogramming
Broadcasting
Multithreading
Time sharing
Show me the answer
Answer: 3. Multithreading
Explanation:
Multithreading: Multithreading allows multiple threads within a process to execute concurrently, possibly on multiple processors.
Conclusion: Multithreading uses multiple processes and processors.
331. Assembly language:
Is usually the primary user interface
Requires fixed-format commands
Is a mnemonic form of machine language
Is quite different from the SCL interpreter
Show me the answer
Answer: 3. Is a mnemonic form of machine language
Explanation:
Assembly Language: Assembly language is a low-level programming language that uses mnemonics to represent machine instructions.
Conclusion: Assembly language is a mnemonic form of machine language.
332. Which of the following are the advantages of modular programming?
The program is much easier to change
Modules can be reused in other programs
Easy debugging
Easy to compile
Show me the answer
Answer: 1. The program is much easier to change
Explanation:
Modular Programming: Modular programming divides a program into smaller, independent modules, making it easier to modify and maintain.
Conclusion: Modular programming simplifies program changes.
333. Which of the following can be accessed by the transfer vector approach of linking?
External data segments
Data located in other procedures
External subroutines
All of the above
Show me the answer
Answer: 4. All of the above
Explanation:
Transfer Vector Approach: The transfer vector approach allows access to external data segments, data in other procedures, and external subroutines.
Conclusion: All the options can be accessed using the transfer vector approach.
334. The linker:
Is the same as the loader
Is required to create a load module
Uses source code as input
Is always used before programs are executed
Show me the answer
Answer: 2. Is required to create a load module
Explanation:
Linker: The linker combines object modules into a single load module, resolving external references.
Conclusion: The linker creates load modules.
335. Indicate which is a pre-emptive scheduling algorithm:
Round-robin
Priority-based
Shortest-job-next
All of the above
Show me the answer
Answer: 4. All of the above
Explanation:
Pre-emptive Scheduling: Round-robin, priority-based, and shortest-job-next are all pre-emptive scheduling algorithms.
Conclusion: All the listed algorithms are pre-emptive.
336. A characteristic of an online real-time system is:
More than one CPU
Offline batch processing
No delay in processing
All of the above
Show me the answer
Answer: 3. No delay in processing
Explanation:
Real-Time Systems: Real-time systems are designed to process data without delay, ensuring timely responses.
Conclusion: No delay in processing is a key characteristic of real-time systems.
337. Indicate which, of the following, is the worst type of module coupling:
Content coupling
Control coupling
No coupling
All of the above
Show me the answer
Answer: 1. Content coupling
Explanation:
Module Coupling: Content coupling is the worst type of coupling, where one module directly modifies the internal data of another module.
Conclusion: Content coupling is the least desirable.
338. A page fault:
Is an error in a specific page
Occurs when a program accesses a page of memory
Is an access to a page not currently in memory
Is a reference to a page belonging to another program
Show me the answer
Answer: 3. Is an access to a page not currently in memory
Explanation:
Page Fault: A page fault occurs when a program tries to access a page that is not currently in main memory, requiring it to be loaded from secondary storage.
Conclusion: A page fault is an access to a page not in memory.
339. In memory systems, boundary registers:
Are used for temporary program variable storage
Are only necessary with fixed partitions
Track page boundaries
Track the beginning and ending of programs
Show me the answer
Answer: 4. Track the beginning and ending of programs
Explanation:
Boundary Registers: Boundary registers track the start and end addresses of programs in memory, ensuring memory protection.
Conclusion: Boundary registers track program boundaries.
340. Relocatable programs:
Cannot be used with fixed partitions
Can be loaded almost anywhere in memory
Do not need a linker
Can be loaded only at one specific location
Show me the answer
Answer: 2. Can be loaded almost anywhere in memory
Explanation:
Relocatable Programs: Relocatable programs can be loaded into any available memory location, as their addresses are adjusted during loading.
Conclusion: Relocatable programs can be loaded anywhere in memory.
341. The FIFO algorithm:
Executes first the job that last entered the queue
Executes first the job that first entered the queue
Executes first the job that has been in the queue the longest
Executes first the job with the least processor needs
Show me the answer
Answer: 2. Executes first the job that first entered the queue
Explanation:
FIFO Algorithm: FIFO (First-In-First-Out) executes jobs in the order they arrive in the queue.
Conclusion: FIFO executes the first job in the queue.
342. The user interface:
Is relatively unimportant
Is slanted toward novice users
Supports both novice and experienced users
Is easy to provide, even with good support
Show me the answer
Answer: 3. Supports both novice and experienced users
Explanation:
User Interface: A good user interface is designed to support both novice and experienced users, providing ease of use and advanced features.
Conclusion: The user interface supports all users.
343. Memory management is:
Not used in modern operating systems
Replaced with virtual memory on current systems
Not used on multiprogramming systems
Critical for even the simplest operating systems
Show me the answer
Answer: 4. Critical for even the simplest operating systems
Explanation:
Memory Management: Memory management is essential for all operating systems, including simple ones, to allocate and manage memory resources efficiently.
Conclusion: Memory management is critical for all operating systems.
344. The practice of “bundling” refers to:
Selling computers alone
Selling peripheral devices with computers
Selling software to run on computers
Giving away software with a computer purchase
Show me the answer
Answer: 4. Giving away software with a computer purchase
Explanation:
Bundling: Bundling refers to including software with the purchase of a computer, often as an incentive.
Conclusion: Bundling involves giving away software with a computer.
345. The primary purpose of an operating system is to:
Make computers easier to use
Keep system programmers employed
Make the most efficient use of the hardware
Allow people to use the computers
Show me the answer
Answer: 3. Make the most efficient use of the hardware
Explanation:
Operating System Purpose: The primary purpose of an operating system is to manage hardware resources efficiently and provide a user-friendly interface.
Conclusion: The operating system optimizes hardware usage.
346. Multiprogramming systems:
Are easier to develop than single programming systems
Execute each job faster
Execute more jobs in the same time period
Are used only on large mainframe computers
Show me the answer
Answer: 3. Execute more jobs in the same time period
Explanation:
Multiprogramming: Multiprogramming allows multiple jobs to reside in memory simultaneously, increasing system throughput by executing more jobs in the same time period.
347. Spooling is most beneficial in a multiprogramming environment where:
Most jobs are CPU-bound
Most jobs are I/O-bound
Jobs are evenly divided as I/O-bound and CPU-bound
There is limited primary memory and need for secondary memory
Show me the answer
Answer: 2. Most jobs are I/O-bound
Explanation:
Spooling: Spooling (Simultaneous Peripheral Operations On-Line) is most beneficial when most jobs are I/O-bound, as it allows overlapping of I/O operations with CPU processing.
Conclusion: Spooling is ideal for I/O-bound jobs.
348. Software that measures, monitors, analyzes, and controls real-world events is called:
System software
Scientific software
Real-time software
Business software
Show me the answer
Answer: 3. Real-time software
Explanation:
Real-Time Software: Real-time software is designed to monitor and control real-world events, ensuring timely responses.
