Operating System MCQs with Answers
Practice important Operating System MCQs with answers and explanations.
Multiple Choice Questions
Q1091: The minimum number of frames required to guarantee execution of an instruction like MOV X,Y is based on the _______ of the instruction.
- A: Size
- B: Priority
- C: Type
- D: Length
View Answer
A
Q1092: When a process starts thrashing, the operating system should _______ to stop the issue.
- A: Decrease multiprogramming
- B: Increase memory
- C: Add more processes
- D: Change allocation
View Answer
A
Q1093: The algorithm that allocates frames based on process size is called _______ allocation.
- A: Fixed
- B: Proportional
- C: Priority
- D: Dynamic
View Answer
B
Q1094: If a process has too few frames, it is likely to experience _______.
- A: Thrashing
- B: Buffering
- C: Fragmentation
- D: LRU
View Answer
A
Q1095: The minimum number of frames required for a process is determined by the _______ of the instruction and its allocation requirements.
- A: Size
- B: Number of pages
- C: Priority
- D: Execution time
View Answer
A
Q1096: In the FIFO page replacement algorithm, the _______ page is replaced first.
- A: Least recently used
- B: Most recently used
- C: First entered
- D: Least frequently used
View Answer
C
Q1097: A process with a high page fault rate but low CPU utilization is likely experiencing _______.
- A: Thrashing
- B: Buffering
- C: Fragmentation
- D: LRU
View Answer
A
Q1098: What is thrashing in the context of virtual memory?
- A: High paging activity
- B: Low CPU utilization
- C: Excessive disk usage
- D: A process faulting repeatedly
View Answer
A
Q1099: What happens when a process is thrashing?
- A: CPU utilization increases
- B: CPU utilization drops to almost zero
- C: The process executes faster
- D: Page faults stop occurring
View Answer
B
Q1100: Which of the following can help reduce thrashing?
- A: Increasing degree of multiprogramming
- B: Decreasing degree of multiprogramming
- C: Reducing program structure complexity
- D: Increasing page size
View Answer
B