Tag: operating systems

Questions Related to operating systems

how will u execute a file in unix?
technology operating systems

  1. . filename

  2. ./

  3. . \

  4. / filename

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Correct Option: B

How do you move a process which is running background to foreground?
technology operating systems

  1. fg pid

  2. bg pid

  3. mv pid

  4. none of the above

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Correct Option: A

Which comman can be used to find the user with which you are logged in the UNIX session

technology operating systems

  1. "who am I" and "id"

  2. "who" and "who am I"

  3. "who" and "id"

  4. "who", "who am I", "id"

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Correct Option: D

Command to get the list of files/directories with name containing "UniVar" under the root directory excluding errors.
technology operating systems

  1. find / -name "UniVar" $1>list

  2. find / -name "UniVar" $0>list

  3. find . -name "UniVar" $1>list

  4. find . -name "UniVar"

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Correct Option: A

Command used to replace all space with | and create another output file
technology operating systems

  1. cat test1 | tr ' ' '|' > test2

  2. cat test1 | cut-d ' ' ' |' > test2

  3. cat test1 | tr '|' ' ' > test2

  4. cat test1

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Correct Option: A

Command used to supress all spaces from a given file named test.
technology operating systems

  1. cat test | cut ' '

  2. cat test | tr -s ' '

  3. cat test | tr ' ' ''

  4. cat test > test 1

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Correct Option: B

A file contains data as given below, Line 1 Line 2 Line 3 Line 4 Line 5 A command which can be used to get the second column from this file is
technology operating systems

  1. cat test | cut -d ' ' -f1

  2. cat test | cut -d ' ' -f2

  3. cat test | cut -f2

  4. None

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Correct Option: B

Why is VI not recommended for viewing log files ?

technology operating systems

  1. Complex

  2. Occupies more memory

  3. Not available in all UNIX servers

  4. Too many commands to remember

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Correct Option: B

Command used to display the contents of the file in reverse order.

technology operating systems

  1. tac

  2. cat

  3. tail -f

  4. head

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Correct Option: A

Display only directories from a particular location/folder
technology operating systems

  1. ls -d

  2. ls -l | grep "$d"

  3. ls -l | grep "^d"

  4. ls -ltr | grep -d

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Correct Option: C