Tag: operating systems

Questions Related to operating systems

I need the list of files in a csv format(comma separated values format).What will be my command?
technology operating systems

  1. ls -m

  2. ls -mlrt

  3. ls -mrt

  4. Both A(ls -m) and C(ls -mrt)

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Correct Option: D

What is the default parameter that attaches to ls?
technology operating systems

  1. ls -l

  2. ls -C

  3. ls -x

  4. ls -A

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Correct Option: B

There are 10 dot files (i,e files starting with .).What will be the output of ls command?
technology operating systems

  1. dot files will not be listed

  2. Last dot file only be listed

  3. only latest dot file be listed

  4. dot files will be listed

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Correct Option: A

There are 10 dot files (i,e files starting with .).What will be the output of ls command executed by root?
technology operating systems

  1. dot files will not be listed

  2. Last dot file only be listed

  3. only latest dot file be listed

  4. dot files will be listed

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Correct Option: D

What is the ls command to view subdirectories recursively?
technology operating systems

  1. ls -R

  2. ls -l

  3. ls -r

  4. ls -A

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Correct Option: A

Which variable determines the number of character positions in the output line for ls command?
technology operating systems

  1. COLUMNS

  2. If COLUMNS is not set,current column value of the display

  3. default value of 80

  4. Both A and B

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Correct Option: D

can you decipher the file type by its ls -lrt --> "prwxrwxr-x-" ?
technology operating systems

  1. The entry is a local socket

  2. The entry is a first-in,first-out (FIFO) special file

  3. The entry is an ordinary file

  4. Purged Permissions

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Correct Option: B

1 How to send signals to other processes?
technology operating systems

  1. 1 Use sigsend()

  2. 2 use kill()

  3. 3 use signal()

  4. 4 Only init can send signals

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Correct Option: B

2 Does Linux supports multi-threading?
technology operating systems

  1. 1 No

  2. 2 Yes

  3. 3

  4. 4

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Correct Option: A

3 How to create devices/device files in Linux
technology operating systems

  1. 1 mkdev

  2. 2 mknod

  3. 3 lndev

  4. 4 None

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Correct Option: B