Selected MCQ

Current Question
Which of the following does not belong to queries for processes?
  • A. Job queue
  • B. Device queue
  • C. Ready queue
  • D. PCB queue
Correct Answer: D
Explanation:
PCB queue is not a standard process queue type in operating systems (the others are common scheduling queues).
Related Question 1
Brain, also known as the first computer virus for MS-DOS, was written by two brothers belonging to which among the following countries?
  • A. Malaysia
  • B. India
  • C. Pakistan
  • D. Iran
Correct Answer: C
Explanation:
The Brain virus (1986) was created by two brothers from Pakistan.
Related Question 2
All the following are examples of storage devices EXCEPT ____.
  • A. Hard disk drives
  • B. Printers
  • C. Floppy disk drives
  • D. CD drives
Correct Answer: B
Explanation:
Printers are output devices, not storage devices.
Related Question 3
All the following are examples of real security and privacy risks EXCEPT ____.
  • A. Hackers
  • B. Spam
  • C. Viruses
  • D. Identity theft
Correct Answer: B
Explanation:
Spam is unwanted email, but it is not primarily a security/privacy risk, unlike the others.
Related Question 4
A set of processes is deadlocked if ____.
  • A. Each process is blocked and will remain so forever
  • B. Each process is terminated
  • C. All processes are trying to kill each other
  • D. None of these
Correct Answer: A
Explanation:
Deadlock occurs when processes are permanently blocked waiting for resources.
Related Question 5
A letterhead should contain all the following EXCEPT ____.
  • A. Full Street address
  • B. Logo
  • C. Complete legal name of the company, group, or individual
  • D. None of these
Correct Answer: D
Explanation:
All listed items are typically included on professional letterhead.