The following quiz “Operating System MCQ (Multiple Choice Questions and Answers)” provides Multiple Choice Questions (MCQs) related to Operating System (OS). These Operating System MCQs are also Interviews (campus interview, walk-in interview, company interview), Placement or recruitment, entrance examinations, and competitive examinations oriented. You can practice the below questions to improve your Operating System (OS) skills. You can click on the View Answer button to check the answer if you needed. Let’s solve this Operating System MCQ (Multiple Choice Questions and Answers) Quiz. An operating system (OS) is system software that manages computer hardware, software resources, and helps the user to interact with them.

📚 Table of Contents:

• Pages 1–3 (Q1–Q30): Kernel types, process vs thread, process states (5-state model), preemptive vs non-preemptive scheduling, Round Robin, SJF, Priority Scheduling, virtual memory, paging, page fault, LRU page replacement, critical section, semaphore, mutex, Coffman’s conditions for deadlock, deadlock handling, thrashing
• Page 4 (Q31–Q40): Segmentation vs paging, internal vs external fragmentation, TLB (Translation Lookaside Buffer), monolithic vs microkernel vs exokernel, interrupt handling, system calls, SRTF, Optimal page replacement, Banker’s algorithm, locality of reference
• Page 5 (Q41–Q50): File systems (FAT/NTFS/ext4), inode structure, directory structure, file allocation methods (contiguous/linked/indexed), disk scheduling (SSTF/SCAN/C-SCAN/LOOK), RAID levels (0/1/5/6/10), I/O management, device drivers, buffering, caching
• Page 6 (Q51–Q60): Memory management unit (MMU), base-limit registers, page table structures (single/multi-level/inverted), shared memory IPC, message passing IPC, pipes, signals, socket IPC, fork/exec system calls, zombie vs orphan processes
• Page 7 (Q61–Q70): CPU scheduling metrics (turnaround time, waiting time, response time, throughput), multi-level queue scheduling, multi-level feedback queue, real-time scheduling (EDF/RMS), multiprocessor scheduling, affinity scheduling, load balancing, context switching overhead
• Page 8 (Q71–Q80): Synchronization problems (producer-consumer, readers-writers, dining philosophers), Peterson’s solution, hardware synchronization (test-and-set, compare-and-swap), spin lock, monitor, condition variables, deadlock avoidance vs prevention vs detection
• Page 9 (Q81–Q90): Virtual machines (Type 1/Type 2 hypervisors), containers vs VMs, Linux OS structure, Windows OS vs Linux, shell scripting basics, cron jobs, user space vs kernel space, system call interface, OS security (access control, capabilities, SELinux)
• Page 10 (Q91–Q100): Cloud OS concepts, distributed OS, microservices and OS interaction, containerization (Docker/Kubernetes from OS perspective), modern OS trends (unikernels, library OS), NUMA architecture, energy-efficient scheduling, OS for IoT, future OS research

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01. When was the first operating system developed?

1. 1949
2. 1950
3. 1951
4. 1952

02. What is an operating system?

1. System service provider to the application programs
2. Collection of programs that manages hardware resources
3. Interface between the hardware and application programs
4. All of above

03. Which of the following error is handled by the operating system?

1. Power failure
2. Lack of paper in printer
3. Connection failure in the network
4. All of above

04. OS stands for

1. Operating system
2. Open Source
3. Open System
4. Operating Styling

05. Operating system is a collection of

1. Input-output devices
2. Hardware components
3. Software routines
4. All of these

06. Which of the following is not a part of the operating system?

1. Input/output control program
2. Job control program
3. Supervisor
4. Performance monitor

07. The part of machine-level instruction, which tells the central processor what has to be done, is

1. Operation code
2. Address
3. Locator
4. Flip-Flop

08.  To access the services of an operating system, the interface is provided by the:

1. System calls
2. Library
3. API
4. Assembly instructions

09. The desktop operating system is also called a ____

1. Single user operating system
2. Client operating system
3. Multi user operating system
4. Embedded operating system

10. Which one of the following Scheduling algorithm allocates the CPU first to the process that requests the CPU first?

1. Priority scheduling
2. Shortest job scheduling
3. First-come, first-served scheduling
4. None of above