LPIC 1 Shells and Shell Scripting Quiz

1. What does the 'test' command (or [ ]) evaluate in shell scripts?

File operations and conditions

Network connectivity

Disk space usage

System performance

2. In shell scripting, what is the purpose of the 'read' command?

Displays file contents

Accepts user input into a variable

Searches for text patterns

Counts lines in input

3. Which command lists all available shells on a system?

Cat /etc/shells

List shells

Shells -a

Show /etc/shellrc

4. What does 'set -e' do in a bash script?

Enables debug mode

Exits on first error

Enables extended globbing

Sets environment variables

5. In a shell script, how do you capture command output into a variable?

Var = command

Var=$(command)

Var={command}

Var=[command]

6. What does the 'sed' command do?

Displays file statistics

Stream editor for filtering and transforming text

Searches for duplicate lines

Secures data encryption

7. Which shell configuration file is sourced for interactive login shells?

.bashrc

.bash_profile

.bash_logout

/etc/bash.conf

8. In bash, how do you execute a command stored in a variable?

Run $variable

Eval $variable

$variable

Execute $variable

9. What does the 'grep' command primarily do?

Searches for patterns in files

Counts lines in a file

Sorts file contents

Compresses files

10. Which operator tests if a file exists?

-e

-f

-d

-x

11. Which shell is the default interactive shell on most modern Linux systems?

Bash

Sh

Ksh

Csh

12. In shell scripting, which special variable contains the script's filename?

$0

$1

$#

$@

13. What does the 'source' command do in bash?

Displays file contents

Executes commands from a file in the current shell

Creates a new shell process

Finds the origin of a command

14. Which loop construct repeats a block while a condition is true?

For

Until

While

Foreach

15. What keyword starts a conditional block in bash?

Test

Condition

If

Case

16. In a shell script, how do you define a variable named 'name' with value 'John'?

Name = John

Name='John'

$name='John'

Set name John

17. Which variable represents the process ID of the current shell?

$PID

$$

$!

$0

18. What does the pipe operator (|) do in shell commands?

Redirects stderr to stdout

Sends output of one command as input to another

Appends output to a file

Executes commands in parallel

19. In bash, which symbol is used to redirect standard output to a file, overwriting it?

>>

>

20. What command displays the current shell environment variable?

Echo $SHELL

Show shell

Which shell

Shell --version