Tag: operating systems

Questions Related to operating systems

Which of the following command is not a filter?
technology operating systems

  1. man

  2. cat

  3. pg

  4. sed

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Correct Option: A

Which is the command used to create a file with zero bytes

technology operating systems

  1. vi

  2. touch

  3. cat

  4. ls

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Correct Option: B

How to find the 51th record of a file containing 100 records in unix

technology operating systems

  1. head -n 51 filename |tail -1

  2. head -51 |tail -1

  3. sed -n 51p

  4. All of the above

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Correct Option: D

Write a command to display a file’s contents in various formats?

technology operating systems

  1. oc -db file_name

  2. oc -cdh filename

  3. od -cbo file_name

  4. od -cbd file_name

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Correct Option: D

What is the command to display all the files in the current directory?

technology operating systems

  1. echo *

  2. ll

  3. list

  4. cd

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Correct Option: A

Write a command to kill the last background job?
technology operating systems

  1. Kill $!

  2. Kill $@

  3. Kill $%

  4. Kill $&

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Correct Option: A

Which of the following commands is not a filter?
technology operating systems

  1. pg

  2. man

  3. cat

  4. head

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Correct Option: B

Name the data structure used to maintain file identification?
technology operating systems

  1. dir

  2. page

  3. inode

  4. istr

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Correct Option: C

which command is used to display information about local and remote users?
technology operating systems

  1. finger

  2. whois

  3. who

  4. whoami

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Correct Option: A

Which command is used to delete all files in the current directory and all its sub-directories?
technology operating systems

  1. rm

  2. rm -r

  3. rmdir

  4. del

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Correct Option: B