Operating System MCQs with Answers
Practice important Operating System MCQs with answers and explanations.
Multiple Choice Questions
Q1071: In the global replacement scheme, pages are selected from _______ frames.
- A: Only one process
- B: All available frames
- C: Higher priority processes
- D: Lower priority processes
View Answer
B
Q1072: The _______ allocation scheme divides free frames equally among processes.
- A: Fixed
- B: Proportional
- C: Priority
- D: Dynamic
View Answer
A
Q1073: In _______ allocation, the number of frames allocated is proportional to the size of the process.
- A: Fixed
- B: Proportional
- C: Priority
- D: Dynamic
View Answer
B
Q1074: If a process does not have enough pages, it may experience _______ due to a high page-fault rate.
- A: Thrashing
- B: Buffering
- C: Fragmentation
- D: LRU
View Answer
A
Q1075: Thrashing results in _______ CPU utilization.
- A: Increased
- B: Decreased
- C: Constant
- D: Fluctuating
View Answer
B
Q1076: A system in thrashing spends more time _______ than executing.
- A: Paging
- B: Processing data
- C: Accessing memory
- D: Executing instructions
View Answer
A
Q1077: If thrashing occurs, the operating system should _______ the degree of multiprogramming.
- A: Increase
- B: Decrease
- C: Keep constant
- D: Randomize
View Answer
B
Q1078: Thrashing can be limited by using a _______ replacement scheme.
- A: Global
- B: Local
- C: Proportional
- D: Fixed
View Answer
B
Q1079: The allocation scheme where high-priority processes can steal frames from low-priority processes is called _______ allocation.
- A: Fixed
- B: Proportional
- C: Priority
- D: Dynamic
View Answer
C
Q1080: If a process starts thrashing, it _______ frames from other processes.
- A: Steals
- B: Allocates
- C: Requests
- D: Does not affect
View Answer
A