Operating Systems MCQs | STS IBA FPSC BPSC SPSC PPSC Mcqs Test Preparation
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Which condition must be present for a system to experience deadlock?
A. Mutual exclusion
B. No preemption
C. Circular wait
D. All of the above
Answer: All of the above
Which page replacement algorithm is considered ‘stack-based’?
A. Least Recently Used (LRU)
B. First-In, First-Out (FIFO)
C. Optimal
D. Clock
Answer: Least Recently Used (LRU)
What is the primary purpose of the ‘inode’ in a UNIX file system?
A. Stores metadata about a file
B. Holds the file data
C. Keeps the file’s name
D. Stores user permissions
Answer: Stores metadata about a file
Which scheduling algorithm minimizes the average waiting time?
A. Shortest Job First
B. Round Robin
C. Priority Scheduling
D. First-Come, First-Served
Answer: Shortest Job First
What does ‘context switch’ refer to in process management?
A. Switching the CPU from one process to another
B. Allocating more memory to a process
C. Terminating a process
D. Switching between kernel mode and user mode
Answer: Switching the CPU from one process to another
Which of the following is a common cause of a ‘deadlock’ in operating systems?
A. Processes waiting indefinitely for resources held by each other
B. Excessive CPU usage
C. Fragmented memory blocks
D. Multiple processes running in parallel
Answer: Processes waiting indefinitely for resources held by each other
Which of the following components is responsible for managing the execution of processes in an operating system?
A. Process Scheduler
B. Memory Manager
C. File System
D. I/O Controller
Answer: Process Scheduler
Which file system is best suited for very large disk volumes and supports file-level compression?
A. NTFS
B. FAT32
C. EXT3
D. ReFS
Answer: NTFS
What is the main advantage of virtual memory in operating systems?
A. It allows the execution of processes that require more memory than physically available
B. It improves CPU performance by allowing multiple processes to run simultaneously
C. It eliminates external fragmentation
D. It provides better protection for memory
Answer: It allows the execution of processes that require more memory than physically available