Tag: operating systems

Questions Related to operating systems

Which of the following is a commented line?
technology operating systems

  1. *This is commented

  2. //This is commented

  3. #This is commented

  4. #/This is commented

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Correct Option: C

What is the output? #!/bin/sh msg1="one" Msg2="$msg1 two" Msg3="$msg2 three" echo $msg3
technology operating systems

  1. “””one” two” three”

  2. “one two three”

  3. one two three

  4. “$msg2 three”

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Correct Option: C

Which of the following is a commented line?
technology operating systems

  1. *This is commented

  2. //This is commented

  3. #This is commented

  4. #/This is commented

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Correct Option: C

What is the result of doing the following? date >> file
technology operating systems

  1. The date output is redirected to the file.

  2. The date output is redirected and appended to the end of the file.

  3. The date output is redirected and appended to the beginning of the file.

  4. None of the above

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Correct Option: B

What is the command used for redirecting the standard error (stderr) to a file?
technology operating systems

  2. >>

  3. 2>

  4. <2

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Correct Option: C

What is the output? #!/bin/sh msg1="one" Msg2="$msg1 two" Msg3="$msg2 three" echo $msg3
technology operating systems

  1. “””one” two” three”

  2. “one two three”

  3. one two three

  4. “$msg2 three”

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Correct Option: C

Which of the following will return the exit code of the last executed command?
technology operating systems

  1. $%

  2. $#

  3. $?

  4. $!

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Correct Option: C

What is the command used for changing the scope of a shell variable to a global variable?
technology operating systems

  1. global

  2. shell

  3. export

  4. None of the above

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Correct Option: C

What is the command used for printing in Shell Script?
technology operating systems

  1. print

  2. printf

  3. echo

  4. echo$

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Correct Option: C

What is the command used for defining a shell variable?
technology operating systems

  1. setenv

  2. setexp

  3. set

  4. unset

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Correct Option: C