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
311. Instruction register contains
- The address of an instruction to be feteched
- The instructions most recently fetched.
- The Data to be written into memory.
- The data to be read from memory.
312. The following
- Start ? Fetch next instruction? Execute instruction ? Halt, represents
- instruction cycle with interrupt
- Instruction cycle without interrupt
- Instruction Cycle with two interrupts
313. Instruction processing consists of
- Fetch cycle only
- Execution cycle only
- Fetch and Execution cycle both
- None of these
314. Operating System is
- Software
- Hardware
- Software and Hardware both
- None of these
315. The concept used to support multi programming environment on a computer is
- Virtual memory
- hierachy of physical memory
- Display of multiple windows
- None the above
316. Which combination of the folowing features will siffice to characterize an OS as a multi programmed OS? (i)More than one program may be loaded into main memory at the same time for execution. (ii)If a program waits for certain events such as I/O, another program is immediately scheduled for execution. (iii)If the execution of a program terminates, another program is immediately scheduled for execution.
- (i) only
- (ii) and (iii)
- (i) and (iii)
- (i), (ii) and (iii)
317. Which combination of the folowing features will siffice to characterize an OS as a multi programmed OS? (i)More than one program may be loaded into main memory at the same time for execution. (ii)If a program waits for certain events such as I/O, another program is immediately scheduled for execution. (iii)If the execution of a program terminates, another program is immediately scheduled for execution.
- (i) only
- (ii) and (iii)
- (i) and (iii)
- (i), (ii) and (iii)
318. Turnaround time is defined as
- Delay between job submission and job completion
- A waiting time
- Both (A) and (B) above
- None of these
319. The only state transition initiated by the user process itself in an operating system is
- Block
- Timer run out
- Dispatch
- Wake up
320. Window 98 is a
- Single user system
- Multi user system
- Single tasking system
- None of these