Operating Systems MCQs | STS IBA FPSC BPSC SPSC PPSC Mcqs Test Preparation
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What is ‘cache memory’ used for?
A. To provide fast access to frequently used data and instructions
B. To store large amounts of data
C. To manage process synchronization
D. To handle network communications
Answer: To provide fast access to frequently used data and instructions
What is the ‘shortest job next’ scheduling algorithm?
A. A scheduling algorithm that selects the process with the smallest execution time to execute next
B. A method of allocating CPU time to processes based on their arrival times
C. A technique for managing I/O operations
D. A method of optimizing memory usage
Answer: A scheduling algorithm that selects the process with the smallest execution time to execute next
What is the role of ‘process control block’ (PCB) in operating systems?
A. To store information about a process, such as its state, program counter, and CPU registers
B. To manage memory allocation for processes
C. To handle input and output operations
D. To schedule processes for execution
Answer: To store information about a process, such as its state, program counter, and CPU registers
What is the ‘memory hierarchy’ in computer systems?
A. A structure that organizes memory into levels based on speed and cost
B. A technique for managing memory allocation
C. A method for optimizing CPU performance
D. A system for organizing data in a file system
Answer: A structure that organizes memory into levels based on speed and cost
Which scheduling algorithm can lead to the ‘convoy effect’?
A. First-Come, First-Served (FCFS)
B. Round Robin
C. Shortest Job First (SJF)
D. Priority Scheduling
Answer: First-Come, First-Served (FCFS)
Which system call is used to terminate a process in UNIX-like operating systems?
A. exit
B. kill
C. terminate
D. end
Answer: exit
What is the purpose of ‘deadlock avoidance’ techniques?
A. To prevent deadlock from occurring by ensuring that resource allocation does not lead to a circular wait
B. To detect deadlock when it occurs
C. To recover from deadlock situations
D. To minimize the impact of deadlock on system performance
Answer: To prevent deadlock from occurring by ensuring that resource allocation does not lead to a circular wait
What is ‘context switching’ in process management?
A. Saving and restoring the state of a process to switch between multiple processes
B. The process of handling hardware interrupts
C. Switching between user and kernel modes
D. Allocating memory to different processes
Answer: Saving and restoring the state of a process to switch between multiple processes
Which of the following is a key characteristic of a real-time operating system?
A. The ability to guarantee response times within specified deadlines
B. The ability to handle multiple processes simultaneously
C. The ability to support multiple user interfaces
D. The ability to run complex applications
Answer: The ability to guarantee response times within specified deadlines