operating systems Online Quiz - 95

Description: operating systems Online Quiz - 95
Number of Questions: 20
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Tags: operating systems
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  1. history

  2. $HOME/.history

  3. $HOME/.sh_history

  4. /etc/history

Correct Option: C

Which command displays the value of the HOME variable?

  1. echo $HOME

  2. echo "$HOME"

  3. echo HOME

  4. echo $HOME

Correct Option: A
  1. command mode

  2. insert mode

  3. preserve mode

  4. last line mode

Correct Option: C
  1. set the hostname

  2. set the time zone

  3. set the IP

  4. all the above

Correct Option: D
  1. the hpux utility

  2. the init process

  3. PDC

  4. the /stand/system

Correct Option: A
  1. mutual exclusion

  2. no preemtion

  3. hold and wait

  4. cycle

Correct Option: A,B,C,D

virtual memory management is a dynamic paging concept

  1. True

  2. False

Correct Option: A
  1. fcfs

  2. sjf

  3. round robin

  4. all of the above

Correct Option: D

external fragmentation can be handled by

  1. compaction

  2. defragmentation

  3. it cannot be handled

  4. none of the choice

Correct Option: A
  1. hard disc

  2. main memory

  3. cpu registers

  4. cache memoy

Correct Option: C
  1. deadlock prevention

  2. deadlock detection

  3. deadlock avoidance

  4. all of the above

Correct Option: D

kernel is known to be the heart of operating sistem

  1. True

  2. False

Correct Option: A

What command is used to run another command immune to hangups, logouts,and quits?

  1. hup

  2. nohup

  3. attachtoroot

  4. daemon

Correct Option: B

What is sticky bit?

  1. It is a file permission that allows the program's text part to stay in swap memory after its execution

  2. UNIX don’t have sticky bit

  3. It’s a Linux only feature

  4. None of above

Correct Option: A

What is shadow in UNIX?

  1. It is a file

  2. It is a process

  3. It is a command

  4. It is a file containing encrypted password & Login info

Correct Option: D

can a file's modified timestamp be modified? If so how?

  1. No

  2. Yes

  3. Yes;using touch command

  4. Yes;using time system call

Correct Option: C
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