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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. Which is not a function of Kernel ?

  • Process management
  • Memory management
  • File system management
  • Interrupt handling
  • All of Above

Answer: Option E

2. What are global locks ?

  • they synchronize access to local resources
  • they synchronize access to global resources
  • they synchronize access to local and global resources
  • none of above

Answer: Option B

3. File record length

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

Answer: Option A

4. Which of following is not an advantage of multiprogramming ?

  • increased throughput
  • shorter response time
  • ability to assign priorities of jobs
  • decreased system overload

Answer: Option D

5. What is a page fault ?

  • is an spelling error in a page in memory
  • is a reference to a page which is in another program
  • is an access to a page not currently in memory
  • always occurs whenever a page is accessed

Answer: Option C

Read more from - Operating System Questions Answers - Set 2