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operating systems Online Quiz - 61

Description: operating systems Online Quiz - 61
Number of Questions: 20
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Tags: operating systems
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You are executing the following commands in a shell $ cp ~/myfile.dat /media/mounted/ext/drive1/newmyfile.dat $ cd /media/mounted/ext/drive1 $ mv newmyfile.dat oldmyfile.dat and now you are asked to display the long listing of the file "newmyfile.dat". Which of the following will you use ?
technology operating systems

  1. ls -lrt !cp:2

  2. ls -lrt !mv:1

  3. ls -lrt /media/mounted/ext/drive1/newmyfile.dat

  4. a and b will give "Command not found error" and c will work fine and all other options are incorrect.

  5. a,b and c will give correct results.

Show answer
Correct Option: E

You are done using your external memory disk (say-KINSTON Pen disk) in Linux and you want to unmount it. But you get an error message like "umount: /media/KINGSTON: device is busy". Which of the following you can use to UNMOUNT IT SAFELY.
technology operating systems

  1. Find the process that is using the drive and kill it safely.

  2. option a is correct and the following needs to be done to implement it: fuser /media/KINGSTON;fuser -k /media/KINGSTON; umount /media/KINGSTON

  3. Option a is incorrect and unsafe and you need to hard boot to solve this problem.

  4. Use a force option on unmount to acheive this : umount -F /media/KINSGTON

  5. a and b are correct.

Show answer
Correct Option: E

You have purchased a dual processor quad-core server and you run the command "cat /proc/cpuinfo | grep processor | wc -l " what will be the output:

technology operating systems

  1. 2

  2. 16

  3. 8

  4. a and b are incorrect. C is correct.

  5. a or c. result depends on other configuration of the system.

Show answer
Correct Option: D

You have 5 mp3 files in a directory and you are planning to rename the all .mp3 files to .ogg files. Will the following Shell script acheive your goal ? for i in ls *.mp3; do mv $i $i.ogg done. Will the above script rename correctly and how many number of files will be present in the directory after execution of the script ?

technology operating systems

  1. Yes. 0 files will be present

  2. No

  3. Yes. 5 file or more will be present.

  4. Yes. Only 5 files will be present.

  5. All the above are incorrect.

Show answer
Correct Option: C

You have 5 mp3 files in a directory and you are planning to rename the all .mp3 files to .ogg files. Will the following Shell script acheive your goal ? for i in ls *.mp3; do mv $i $i.ogg done. Will the above script rename correctly and how many number of files will be present in the directory after execution of the script ?
technology operating systems

  1. Yes. 0 files will be present

  2. No

  3. Yes. 5 file or more will be present.

  4. Yes. Only 5 files will be present.

  5. All the above are incorrect.

Show answer
Correct Option: C

Repeat the last action
technology operating systems

  1. F1

  2. F4 or CTRL + Y

  3. CTRL + D

  4. CTRL + E

Show answer
Correct Option: B

Fill down the selection the same content of selected cell

technology operating systems

  1. CTRL + D

  2. CTRL + E

  3. CTRL + Y

  4. CTRL + A

Show answer
Correct Option: A

Enter the date
technology operating systems

  1. ALT+= (EQUAL SIGN)

  2. CTRL + : (COLON)

  3. CTRL+; (SEMICOLON)

  4. CTRL+K

Show answer
Correct Option: C

Enter the time
technology operating systems

  1. ALT+= (EQUAL SIGN)

  2. CTRL+K

  3. CTRL + : (COLON)

  4. CTRL+SHIFT+: (COLON)

Show answer
Correct Option: D

Repeat the last action
technology operating systems

  1. F1

  2. CTRL + D

  3. F4 or CTRL + Y

  4. CTRL + E

Show answer
Correct Option: C

Insert a hyperlink
technology operating systems

  1. CTRL + E

  2. CTRL + Y

  3. CTRL+K

  4. CTRL + A

Show answer
Correct Option: C

Short cut to hide the selected columns

technology operating systems

  1. CTRL + 0

  2. CTRL + C

  3. CTRL + 9

  4. CTRL + 1

Show answer
Correct Option: A

Short cut to hide the selected rows
technology operating systems

  1. CTRL + 0

  2. CTRL + C

  3. CTRL + 9

  4. CTRL + 1

Show answer
Correct Option: C

To open the format cells dialog box

technology operating systems

  1. CTRL + 0

  2. CTRL + C

  3. CTRL + 9

  4. CTRL + 1

Show answer
Correct Option: D

Short cut to apply date format with day, month and year
technology operating systems

  1. CTRL + SHIFT + A

  2. CTRL + SHIFT + # (POUND)

  3. CTRL + D

  4. CTRL + SHIFT + D

Show answer
Correct Option: B

Short cut to apply percentage format with no decimal places
technology operating systems

  1. CTRL + SHIFT + $

  2. ALT + %

  3. CTRL + %

  4. CTRL + SHIFT + %

Show answer
Correct Option: D

For debugging shell Scripts which command is used?
technology operating systems

  1. set filename

  2. set -x

  3. set +x

  4. set ls -l

Show answer
Correct Option: B

what are the system variables in unix?
technology operating systems

  1. PATH variable

  2. HOME variable

  3. IFS variable

  4. All the above

Show answer
Correct Option: D

which commans are used to manipulate the ownership of file or directory?
technology operating systems

  1. chown

  2. chgrp

  3. both 1 & 2

  4. None of the above

Show answer
Correct Option: C

To unhide the selected column
technology operating systems

  1. CTRL + SHIFT + )

  2. CTRL + SHIFT + (

  3. CTRL + (

  4. CTRL + U

Show answer
Correct Option: A
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