Tag: operating systems

Questions Related to operating systems

  1. test $a -eq $b

  2. test $a -equal $b

  3. test $a = $b

  4. sh -c test $a == $b


Correct Option: A
  1. sleep 1 & echo $#

  2. test sleep 1

  3. sleep 1 & echo $?

  4. sleep 1 & echo $!


Correct Option: A,C
  1. $abc=xyz; echo $abc

  2. abc=xyz ; echo $abc

  3. export abc=xyz ; echo $abc

  4. abc=xyz; export abc=xyz ; echo $abc


Correct Option: D
  1. mv new old

  2. none

  3. cp new old

  4. rm new old


Correct Option: A
  1. 2> filename

  2. 1> filename

  3. &> filename

  4. 2> /dev/null


Correct Option: D
  1. rm filename

  2. less filename

  3. touch filename

  4. dl filename


Correct Option: A