Tag: operating systems

Questions Related to operating systems

Which one of the following command shows the last 50 commands the user has entered.

  1. fc -l 50

  2. fc -l -50

  3. history 50

  4. history $$


Correct Option: B
  1. Single quote

  2. front slash

  3. full stop

  4. back slash


Correct Option: D
  1. #On the beach at night, stands a child with her father

  2. #On #the #at #a #with #her

  3. #beac #nigh #stan #chil #fath

  4. #beach #night, #stands #child #father


Correct Option: D
  1. checks prime number; returns one when not prime and zero when prime

  2. checks prime number; returns none when not prime and zero when prime

  3. checks prime number; returns zero when not prime and one when prime

  4. checks prime number; returns zero when not prime and none when prime


Correct Option: D