Operating System Basics Questions and Answers
Operating System Basics questions with answers are among the most commonly asked in technical interviews and exams. This section covers core OS concepts like process management, memory allocation, file systems, and scheduling algorithms. Practicing programming questions and answers on operating systems helps strengthen your conceptual clarity and practical understanding of computer architecture. Frequently featured in GATE, TCS, Infosys, and Wipro placements, these MCQs provide a balanced mix of theoretical and applied knowledge. Clear explanations make this section an ideal resource for anyone preparing for system-related roles or competitive exams.
Operating System Basics
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563 questions
81. Which technique was introduced because a single job could not keep both the CPU and the I/O devices busy?
- Time-sharing
- SPOOLing
- Preemptive scheduling
- Multiprogramming
82. _________ allocates the largest hole (free fragmant) available in the memory.
- Best Fit
- Worst Fit
- First Fit
- None of the above
83. A process is starved
- if it is permanently waiting for a resource
- if semaphores are not used
- if a queue is not used for scheduling
- if demand paging is not properly implemented
84. The degree of Multiprogramming is controlled by
- CPU Scheduler
- Context Switching
- Long-term Scheduler
- Medium term Scheduler
85. The time taken to bring the desired track/cylinder under the head is _________.
- Seek time
- Latency time
- Transfer time
- Read time
86. Replace the page that will not be used for the longest period of time. This principle is adopted by ____________.
- FIFO Page replacement algorithm
- Optimal Page replacement algorithm
- Round robin scheduling algorithm
- SCAN scheduling algorithm
87. Which of the following is a criterion to evaluate a scheduling algorithm?
- CPU Utilization: Keep CPU utilization as high as possible.
- Throughput: number of processes completed per unit time.
- Waiting Time: Amount of time spent ready to run but not running.
- All of the above
88. The operating system of a computer serves as a software interface between the user and the ________.
- Hardware
- Peripheral
- Memory
- Screen
89. Super computers typically employ _______.
- Real time Operating system
- Multiprocessors OS
- desktop OS
- None of the above
90. A process that is based on IPC mechanism which executes on different systems and can communicate with other processes using message based communication, is called ________.
- Local Procedure Call
- Inter Process Communication
- Remote Procedure Call
- Remote Machine Invocation