Tag: operating systems

Questions Related to operating systems

Which one of the following PIDs is assigned to the init program?
technology operating systems

  1. 0

  2. 1

  3. 2

  4. 100

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Correct Option: B

How can the time stamps of a file be preserved while copying a file?

technology operating systems

  1. cp -i

  2. cp -r

  3. cp -p

  4. cp -R

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Correct Option: C

How to send a running process to background?
technology operating systems

  1. ctrl+c then bg

  2. ctrl+z then bg

  3. ctlr+m then bg

  4. ctrl+z then fg

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Correct Option: B

"what does the command do? find . -type f -mtime 2"

technology operating systems

  1. list all ordinary files in current dir that have been modified within last 24 hours

  2. list all ordinary files in current dir that have been modified within last 4 days

  3. list all ordinary files in current dir that have been modified within last 48 hrs

  4. list all ordinary files in current dir that have been modified within last 2 hrs

Show answer
Correct Option: C

AI Explanation

To answer this question, let's break down the command and its options:

The command "find" is used to search for files and directories within a given directory hierarchy.

The dot (.) represents the current directory.

The option "-type f" is used to specify that the search should only include ordinary files (not directories or other types of files).

The option "-mtime 2" is used to specify that the search should include files that have been modified within the last 48 hours. The number 2 represents the number of days.

Therefore, the correct answer is C) list all ordinary files in the current directory that have been modified within the last 48 hours.

what is the name of the data structure to maintain file identification?

technology operating systems

  1. inode

  2. filter

  3. kernel

  4. shell

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Correct Option: A

How to save the output of any command in a file as well as display the same on the VDU?

technology operating systems

  1. echo “hello world” > temp.txt

  2. echo “hello world” | tee temp.txt

  3. echo "hello world">tmp.txt|tee tmp.txt

  4. echo "hello world">tmp.txt|print

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Correct Option: B

Which of the following will list the directories from the current working path.
technology operating systems

  1. ls -l | grep ^d

  2. ls | grep dir

  3. ls | grep ^d

  4. pwd

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Correct Option: A

How can you print the first 10 line of a file
technology operating systems

  1. head +10 file

  2. cat file

  3. tail -10 file

  4. head -10 file

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Correct Option: D

How can you display the line numbers after opening a file in vi ?
technology operating systems

  1. :se ic

  2. :se nu

  3. :set G

  4. ctrl+n

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Correct Option: B

How can you insert a new line in vi ?
technology operating systems

  1. Esc+O

  2. Esc+i

  3. Esc+G

  4. Esc+x

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Correct Option: A