Operating System MCQs with Answers
Practice important Operating System MCQs with answers and explanations.
Multiple Choice Questions
Q441: What is the average queue length for the SJF scheduling algorithm as computed using Little's formula?
- A: 1.8
- B: 2.3
- C: 3
- D: 1.5
View Answer
A
Q442: The 'nice' value in UNIX scheduling helps to prevent a user from migrating out of its assigned __________.
- A: Kernel Group
- B: User Group
- C: I/O group
- D: Process queue
View Answer
A
Q443: Scheduling algorithms can be evaluated by using which of the following techniques?
- A: Analytic Evaluation and Simulations
- B: Only Analytic Evaluation
- C: Only Simulation
- D: None of the above
View Answer
A
Q444: The main goal of using multilevel feedback queue scheduling is to manage __________ processes efficiently.
- A: Interactive and I/O bound processes
- B: CPU-bound processes
- C: Process starvation
- D: Quantum processes
View Answer
A
Q445: The Little's formula n = λ * W is used for __________.
- A: Queuing network analysis
- B: CPU-bound process evaluation
- C: Scheduling queue priority analysis
- D: Scheduling algorithm simulation
View Answer
A
Q446: The primary characteristic of UNIX System V scheduling algorithm is __________.
- A: Round Robin within each priority band
- B: Priority recalculation every second
- C: Random scheduling of processes
- D: FIFO scheduling of processes
View Answer
A
Q447: The efficiency of a scheduling algorithm is judged by __________.
- A: CPU utilization, response time, and throughput
- B: Only CPU utilization
- C: Only response time
- D: Only throughput
View Answer
A
Q448: What is the purpose of process synchronization?
- A: To ensure data consistency
- B: To improve system performance
- C: To control CPU scheduling
- D: To manage memory allocation
View Answer
A
Q449: What is a race condition in process synchronization?
- A: A condition where multiple processes access shared data concurrently
- B: A condition where processes execute in sequence
- C: A condition where processes are in a deadlock state
- D: A condition where processes have no access to shared resources
View Answer
A
Q450: In the producer-consumer problem, what does the variable 'counter' represent?
- A: The total number of items produced
- B: The total number of items consumed
- C: The current index in the buffer
- D: The total capacity of the buffer
View Answer
A