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
181. The main memory of the computer
- Controls the operating of computer
- Performs data processing functions.
- Stores data and programs.
- None of these
182. Program counter (P(C) contains
- Address of an instruction to be fetched
- Instructions most recently fetched
- Data to be written into memory
- Data to be read from memory
183. MAR (memory address register)
- Contains data to be written into memory
- Contains data to be read from memory
- Specifies location in memory for next read/or writer
- Contains address of next instruction to be fetched
184. IR (Instruction register)
- Contains the address of an instruction to be fetched
- Contains the instruction most recently fetched
- Specifies memory addresses.
- None of these
185. Which of the following is not an address register ?
- Index register
- Segment pointer
- Stack pointer
- Data register
186. Following is not the state of Five-State register ?
- Index register
- Segment pointer
- Stack pointer
- Data register
187. Memory table is used
- To allocate main memory to process
- To allocate secondary memory to process
- To manage virtual memory
- A, B and C are true
188. I/O tables are used
- To assign I/O devices of computer
- To manage I/O devices of computer
- A and B both true
- A and B both false
189. The operating system control tables maintains file table, because
- These tabes manage I/O devices and channels of the computer system.
- These tables provide information aboutl the existence of iles, their location on secondary memory and their current status.
- these tables provide information to manage process
- None of these
190. Process in computer
- Controls the operations of the computer/process data functions
- Stores data and program.
- Move data between computer and its external environment.
- None of these