Operating System Interview Questions

1. What acts as an intermediary between the computer user and the computer hardware?

  • A) Application
  • B) Firmware
  • C) BIOS
  • D) Operating System
Answer: Operating System

2. What type of rewritable memory do general-purpose computers primarily use to run programs?

  • A) Main Memory
  • B) Cache Memory
  • C) Flash Memory
  • D) Virtual Memory
Answer: Main Memory

3. Which semiconductor technology is commonly used to implement main memory?

  • A) SRAM
  • B) FRAM
  • C) DRAM
  • D) EEPROM
Answer: DRAM

4. What are the two separate modes of operation in an operating system?

  • A) Admin, Guest
  • B) System, Application
  • C) User, Kernel
  • D) Client, Server
Answer: User, Kernel

5. Which mode bit indicates kernel mode?

  • A) 0
  • B) 1
  • C) 2
  • D) 4
Answer: 0

6. Which mode bit indicates user mode?

  • A) 0
  • B) 1
  • C) 2
  • D) 4
Answer: 1

7. What security aspect is ensured by the ‘Login-ID and Password’ mechanism in an operating system?

  • A) Encryption
  • B) Availability
  • C) Authentication
  • D) Non-repudiation
Answer: Authentication

8. Which of the following is typically not a function of an operating system?

  • A) Encryption
  • B) Process Management
  • C) Memory Management
  • D) File Management
Answer: Encryption

9. What special operation does software execute to trigger an interrupt?

  • A) Function Call
  • B) System Call
  • C) Interrupt Call
  • D) Library Call
Answer: System Call

10. What is another name for a system call?

  • A) Monitor Call
  • B) Service Call
  • C) Hardware Call
  • D) Kernel Call
Answer: Monitor Call
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