Operating Systems MCQs | STS IBA FPSC BPSC SPSC PPSC Mcqs Test Preparation
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Which of the following types of memory has the shortest access time?
A. Registers
B. Cache
C. Main memory
D. Virtual memory
Answer: Registers
In which type of system would you use the ‘preemptive scheduling’ technique?
A. Real-time systems
B. Batch processing systems
C. Non-preemptive systems
D. Time-sharing systems
Answer: Time-sharing systems
In a system with multiple CPUs, what is ‘symmetric multiprocessing’ (SMP)?
A. All CPUs share the same memory and I/O resources
B. Each CPU works independently with its own resources
C. The system alternates between CPUs for process execution
D. Each CPU manages specific processes
Answer: All CPUs share the same memory and I/O resources
Which scheduling algorithm is likely to cause starvation?
A. Priority Scheduling
B. Round Robin
C. FCFS
D. Multilevel Queue
Answer: Priority Scheduling
What is the primary function of the ‘dispatcher’ in an operating system?
A. To allocate CPU time to processes
B. To swap processes in and out of memory
C. To manage I/O devices
D. To assign priority to processes
Answer: To allocate CPU time to processes
What is a ‘file descriptor’?
A. An integer representing an open file in the system
B. The name of a file in the file system
C. A description of the file's contents
D. A unique identifier for each file in the system
Answer: An integer representing an open file in the system
What does ‘spooling’ refer to in an operating system?
A. Managing print jobs by storing them on a disk or buffer until the printer is ready
B. Swapping processes between memory and disk
C. Scheduling processes in a round-robin manner
D. Allocating system resources to processes
Answer: Managing print jobs by storing them on a disk or buffer until the printer is ready
What does ‘mutual exclusion’ mean in the context of operating systems?
A. Only one process can access a critical section at a time
B. Two processes can share a resource simultaneously
C. Processes are suspended when accessing the same resource
D. Resources are shared between all processes
Answer: Only one process can access a critical section at a time
In which memory management technique can ‘compaction’ be used to combat fragmentation?
A. Dynamic partitioning
B. Paging
C. Segmentation
D. Fixed partitioning
Answer: Dynamic partitioning