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When did IBM released the first version of its disk operating system DOS version 1.0 ?

  • 1981
  • 1982
  • 1983
  • 1984

Answer: Option A

Similar Questions :

1. If the CPU scheduling policy is FCFS, then what would be average waiting time ?

  • 10 ms
  • 10.8 ms
  • 12 ms
  • 12.8 ms

Answer: Option D

2. Which scheduling policy is most suitable for time shared operating system ?

  • Shortest job first
  • FCFS
  • LCFS
  • Round robin

Answer: Option D

3. UNIX is a single user operating system.

  • True
  • False

Answer: Option B

Explanation:

UNIX is a Multi user operating system.

4. Disk scheduling involves deciding ?

  • which disk should be accessed next
  • the order in which disk access request should be made
  • physical location of files
  • type of disks a system should have

Answer: Option B

5. File record length

  • Should be chosen to match the data characteristics
  • should be fixed
  • should be variable
  • vary system to system

Answer: Option A

Read more from - Operating System Questions Answers - Set 2