Operating Systems MCQs | STS IBA FPSC BPSC SPSC PPSC Mcqs Test Preparation
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Which of the following is not a characteristic of ‘real-time operating systems’?
A. Time constraints on task execution
B. Low response times
C. No context switching
D. Guaranteed worst-case execution time
Answer: No context switching
Which of the following is a ‘preemptive’ scheduling algorithm?
A. Round Robin
B. First-Come, First-Served
C. Shortest Job Next
D. FCFS
Answer: Round Robin
Which of the following is a key feature of ‘distributed systems’?
A. Geographically separated nodes collaborate on a task
B. Multiple processes share the same memory space
C. All nodes run the same operating system
D. There is no network involved
Answer: Geographically separated nodes collaborate on a task
What does ‘multiprogramming’ aim to achieve in an operating system?
A. Maximize CPU utilization
B. Increase memory efficiency
C. Minimize response time
D. Improve security
Answer: Maximize CPU utilization
What is the key role of the ‘swapper’ process in an operating system?
A. Swaps entire processes in and out of memory
B. Manages memory allocation for processes
C. Allocates CPU time to processes
D. Handles process creation and termination
Answer: Swaps entire processes in and out of memory
Which disk scheduling algorithm ensures ‘fair’ access by all processes?
A. Round Robin
B. FCFS (First Come, First Served)
C. SSTF (Shortest Seek Time First)
D. SCAN
Answer: FCFS (First Come, First Served)
Which of the following is a disadvantage of using the ‘paging’ method in memory management?
A. Internal fragmentation
B. External fragmentation
C. I/O overhead
D. Increased CPU utilization
Answer: Internal fragmentation
Which of the following is not a valid state for a process?
A. New
B. Ready
C. Executing
D. Blocked
Answer: Executing
What is the main disadvantage of the ‘priority scheduling’ algorithm?
A. Leads to starvation
B. Requires more memory
C. Causes deadlock
D. Increases context switching
Answer: Leads to starvation