42 interview questions for developers (2025)

Hard

2 votes361 runs0 comment

Display lines containing 'Error' in all .txt files

System Administrator

grep

bash

Anonymous authorat Sep 19, 2022

Medium

1 vote362 runs0 comment

Find the default shell for a user in Bash

System Administrator

bash

shell

Anonymous authorat Sep 19, 2022

Hard

1 vote326 runs

1 comment

Find all rows containing patterns 1 and 2 in a file using Bash

System Administrator

bash

grep

regular expression

Anonymous authorat Sep 19, 2022

Medium

1 vote321 runs0 comment

What does the shell prompt `user@user:~$` mean?

System Administrator

bash

shell

Anonymous authorat Sep 19, 2022

Hard

1 vote296 runs

3 comments

How to count the number of lines in a file in Bash

System Administrator

bash

command line

wc

Anonymous authorat Mar 23, 2022

Easy

1 vote283 runs0 comment

What does 2>&1 means in the script below? ``` compile "$i" > "${i%.txt}".ass 2>&1 ```

System Administrator

bash

redirect

Anonymous authorat Sep 19, 2022

Hard

1 vote209 runs0 comment

Which line deletes all files in a directory? (visible and hidden files)

System Administrator

bash

files

F. Boutalebat Apr 28, 2023

Medium

1 vote82 runs0 comment

How to set the permissions of a file in Bash?

System Administrator

permissions

chmod

Anonymous authorat Mar 23, 2022

Hard

1 vote80 runs0 comment

Display lines 4 to 12 of a file in Bash

System Administrator

bash

file

Anonymous authorat Mar 23, 2022

Expert

0 vote336 runs0 comment

Write a bash script that prints the numbers from 1 to 11.

System Administrator

bash

functions

arguments

Anonymous authorat Sep 19, 2022

Hard

0 vote314 runs0 comment

How to do an infinite loop in bash?

System Administrator

loops

bash

Anonymous authorat Mar 23, 2022

Expert

0 vote310 runs0 comment

How to use egrep and diff in Bash

System Administrator

bash

command line

Anonymous authorat Sep 19, 2022

Medium

0 vote296 runs0 comment

Explain what happens when the user types a command in a shell.

System Administrator

shell

command

Anonymous authorat Mar 23, 2022

Expert

0 vote294 runs0 comment

Write a Bash script that prints 3.

System Administrator

bash

variables

operators

Anonymous authorat Sep 19, 2022

Medium

0 vote290 runs0 comment

Write the first 10 lines of a file in Bash

System Administrator

bash

file

Anonymous authorat Mar 23, 2022

Medium

0 vote288 runs0 comment

Write a Bash script that counts the number of lines in all text files in the current directory.

System Administrator

bash

loops

files

Anonymous authorat Sep 19, 2022

Hard

0 vote286 runs0 comment

Return the parent directory of a path in Bash

System Administrator

bash

command line

Anonymous authorat Mar 23, 2022

Medium

0 vote284 runs0 comment

Declare a function in Bash with or without the keyword `function`

System Administrator

functions

Anonymous authorat Mar 23, 2022

Hard

0 vote281 runs0 comment

Switch to privileged mode in Bash

System Administrator

sudo

privileges

Anonymous authorat Sep 19, 2022

Easy

0 vote272 runs0 comment

Write an extra line to a file in Bash

System Administrator

files

bash

Anonymous authorat Mar 23, 2022

42 interview questionsfor developers (2025)

Test your developer skills before an interview with 42 corrected questions on 80+ topics. Beginner, Intermediate or Expert level.

Display lines containing 'Error' in all .txt files

Find the default shell for a user in Bash

Find all rows containing patterns 1 and 2 in a file using Bash

What does the shell prompt `user@user:~$` mean?

How to count the number of lines in a file in Bash

What does 2>&1 means in the script below? ``` compile "$i" > "${i%.txt}".ass 2>&1 ```

Which line deletes all files in a directory? (visible and hidden files)

How to set the permissions of a file in Bash?

Display lines 4 to 12 of a file in Bash

Write a bash script that prints the numbers from 1 to 11.

How to do an infinite loop in bash?

How to use egrep and diff in Bash

Explain what happens when the user types a command in a shell.

Write a Bash script that prints 3.

Write the first 10 lines of a file in Bash

Write a Bash script that counts the number of lines in all text files in the current directory.

Return the parent directory of a path in Bash

Declare a function in Bash with or without the keyword `function`

Switch to privileged mode in Bash

Write an extra line to a file in Bash