Operating Systems MCQs | STS IBA FPSC BPSC SPSC PPSC Mcqs Test Preparation
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What is ‘virtual memory’?
A. A memory management technique that provides an illusion of a large, contiguous memory space
B. A type of physical memory used in computers
C. A method to cache frequently accessed data
D. A technique for increasing CPU speed
Answer: A memory management technique that provides an illusion of a large, contiguous memory space
Which of the following is an example of a ‘preemptive’ scheduling algorithm?
A. Round Robin
B. Shortest Job First (SJF)
C. First-Come, First-Served (FCFS)
D. Priority Scheduling
Answer: Round Robin
What does ‘fork’ system call do in UNIX-like operating systems?
A. Creates a new process by duplicating the current process
B. Executes a new program within the same process
C. Terminates the current process
D. Waits for a process to finish execution
Answer: Creates a new process by duplicating the current process
Which of the following is a technique to avoid deadlock?
A. Using the Banker's algorithm to allocate resources safely
B. Increasing the size of the process queue
C. Using priority scheduling
D. Allocating all resources at once
Answer: Using the Banker's algorithm to allocate resources safely
What is the purpose of the ‘kernel’ in an operating system?
A. To manage hardware resources and provide a stable interface between hardware and user applications
B. To handle user input and output operations
C. To manage network communications
D. To execute user applications
Answer: To manage hardware resources and provide a stable interface between hardware and user applications
Which of the following describes ‘critical section’ in process synchronization?
A. A segment of code that must be executed by only one process at a time
B. A section of code that handles system calls
C. A part of the operating system that manages memory
D. A section of memory used for process communication
Answer: A segment of code that must be executed by only one process at a time
What is ‘paging’ used for in an operating system?
A. Dividing memory into fixed-size blocks to manage memory more efficiently
B. Allocating CPU time to processes
C. Managing I/O operations
D. Handling process synchronization
Answer: Dividing memory into fixed-size blocks to manage memory more efficiently
What is the purpose of ‘system calls’ in an operating system?
A. To provide a mechanism for user programs to request services from the operating system
B. To manage hardware interrupts
C. To schedule processes
D. To handle network communications
Answer: To provide a mechanism for user programs to request services from the operating system
Which of the following is not a valid page replacement algorithm?
A. Least Recently Used (LRU)
B. First-In, First-Out (FIFO)
C. Optimal Page Replacement
D. Segmentation
Answer: Segmentation