Question 1

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 ?

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ls -lrt !cp:2
ls -lrt !mv:1
ls -lrt /media/mounted/ext/drive1/newmyfile.dat
a and b will give "Command not found error" and c will work fine and all other options are incorrect.
a,b and c will give correct results.

Answer

Correct Option: E

Question 2

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.

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Find the process that is using the drive and kill it safely.
option a is correct and the following needs to be done to implement it: fuser /media/KINGSTON;fuser -k /media/KINGSTON; umount /media/KINGSTON
Option a is incorrect and unsafe and you need to hard boot to solve this problem.
Use a force option on unmount to acheive this : umount -F /media/KINSGTON
a and b are correct.

Answer

Correct Option: E

Question 3

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:

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2
16
8
a and b are incorrect. C is correct.
a or c. result depends on other configuration of the system.

Answer

Correct Option: D

Question 4

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 ?

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Yes. 0 files will be present
No
Yes. 5 file or more will be present.
Yes. Only 5 files will be present.
All the above are incorrect.

Answer

Correct Option: C

Question 5

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 ?

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Yes. 0 files will be present
No
Yes. 5 file or more will be present.
Yes. Only 5 files will be present.
All the above are incorrect.

Answer

Correct Option: C

Question 6

Repeat the last action

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F1
F4 or CTRL + Y
CTRL + D
CTRL + E

Answer

Correct Option: B

Question 7

Fill down the selection the same content of selected cell

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CTRL + D
CTRL + E
CTRL + Y
CTRL + A

Answer

Correct Option: A

Question 8

Enter the date

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ALT+= (EQUAL SIGN)
CTRL + : (COLON)
CTRL+; (SEMICOLON)
CTRL+K

Answer

Correct Option: C

Question 9

Enter the time

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ALT+= (EQUAL SIGN)
CTRL+K
CTRL + : (COLON)
CTRL+SHIFT+: (COLON)

Answer

Correct Option: D

Question 10

Repeat the last action

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F1
CTRL + D
F4 or CTRL + Y
CTRL + E

Answer

Correct Option: C

Question 11

Insert a hyperlink

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CTRL + E
CTRL + Y
CTRL+K
CTRL + A

Answer

Correct Option: C

Question 12

Short cut to hide the selected columns

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CTRL + 0
CTRL + C
CTRL + 9
CTRL + 1

Answer

Correct Option: A

Question 13

Short cut to hide the selected rows

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CTRL + 0
CTRL + C
CTRL + 9
CTRL + 1

Answer

Correct Option: C

Question 14

To open the format cells dialog box

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CTRL + 0
CTRL + C
CTRL + 9
CTRL + 1

Answer

Correct Option: D

Question 15

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

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CTRL + SHIFT + A
CTRL + SHIFT + # (POUND)
CTRL + D
CTRL + SHIFT + D

Answer

Correct Option: B

Question 16

Short cut to apply percentage format with no decimal places

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CTRL + SHIFT + $
ALT + %
CTRL + %
CTRL + SHIFT + %

Answer

Correct Option: D

Question 17

For debugging shell Scripts which command is used?

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set filename
set -x
set +x
set ls -l

Answer

Correct Option: B

Question 18

what are the system variables in unix?

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PATH variable
HOME variable
IFS variable
All the above

Answer

Correct Option: D

Question 19

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

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chown
chgrp
both 1 & 2
None of the above

Answer

Correct Option: C

Question 20

To unhide the selected column

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CTRL + SHIFT + )
CTRL + SHIFT + (
CTRL + (
CTRL + U

Answer

Correct Option: A

Description: operating systems Online Quiz - 61
Number of Questions: 20
Created by: Aliensbrain Bot
Tags: operating systems

operating systems Online Quiz - 61

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