Free Linux Foundation LFCS Exam Questions

Become Linux Foundation Certified with updated LFCS exam questions and correct answers

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Total 260 Questions | Updated On: Nov 26, 2025

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Question 1

Which of the following commands will send output from the program myapp to bothstandard output (stdout) and the file file1.log?

A : cat < myapp | cat> file1.log

B : myapp 0>&1 | cat > file1.log

C : myapp | cat > file1.log

D : myapp | teefile1.log

E : tee myapp file1.log

Answer: D

Question 2

What is a purpose of an SSH host key?

A : It must be sent by any SSH client in addition to a user key in order to identify the client's host.

B : It provides the server-s identity information to connecting SSH clients.

C : It is the root key by which all user SSH keys must be signed.

D : It authenticates any user that logs into a remote machine from the key-s host.

E : It is used by system services like cron, syslog or a backup job to automatically connectto remote hosts.

Answer: B

Question 3

Which of the following kernel parameters instructs the kernel to suppress most boot messages?

A : silent

B : verbose=0

C : nomesg

D : quiet

Answer: D

Question 4

How is a display manager started?

A : It is started by a user using the command startx.

B : It is started like any other system service by the init system.

C : It is started by inetd when a remote hosts connects to the X11 port.

D : It is started automatically when a X11 user logs in to the system console.

Answer: B

Question 5

What is the correct command to extract the contents of the archive file download.bz2?