Operating Systems MCQs | STS IBA FPSC BPSC SPSC PPSC Mcqs Test Preparation
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What does ‘context switch’ involve?
A. Saving and restoring the state of a process
B. Switching between user and kernel modes
C. Changing the process priority
D. Allocating more memory to a process
Answer: Saving and restoring the state of a process
Which of the following is a common method for implementing ‘process synchronization’?
A. Using semaphores
B. Using file locks
C. Using memory paging
D. Using cache memory
Answer: Using semaphores
What is the main purpose of ‘cache memory’ in an operating system?
A. Reduce the time required to access frequently used data
B. Increase the total system memory
C. Improve the speed of the CPU
D. Manage disk storage
Answer: Reduce the time required to access frequently used data
Which of the following is a common technique for handling ‘deadlock’?
A. Resource allocation graph
B. Page replacement algorithm
C. File system journaling
D. Thread synchronization
Answer: Resource allocation graph
What does ‘multithreading’ enable in an operating system?
A. Concurrent execution of multiple threads within a process
B. Multiple processes running simultaneously
C. Multiple user accounts on the system
D. Multiple file systems access
Answer: Concurrent execution of multiple threads within a process
What is ‘write-back’ caching in the context of file systems?
A. Data is written to cache and then to disk later
B. Data is written directly to disk
C. Cache is used only for reading data
D. Data is kept only in main memory
Answer: Data is written to cache and then to disk later
What is the primary purpose of ‘file system mounting’?
A. Make file systems accessible to the operating system
B. Manage disk partitions
C. Allocate disk space to processes
D. Handle file permissions
Answer: Make file systems accessible to the operating system
In which scheduling algorithm do processes get a fixed time slot?
A. Round Robin
B. Shortest Job First
C. Priority Scheduling
D. First-Come, First-Served
Answer: Round Robin
What is ‘swapping’ in operating systems?
A. Moving processes between main memory and disk
B. Switching between different tasks
C. Transferring data between hardware components
D. Reallocating memory resources
Answer: Moving processes between main memory and disk