Free Linux Foundation LFCT Exam Questions

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

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Total 200 Questions | Updated On: Jan 05, 2026

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Question 1

An administrator notices that a critical application service isn’t responding as expected on a Linux system. To diagnose the issue, which command should be used to display the current status of a service named ‘app_service’?

A : systemctl status app_service

B : ps aux | grep app_service

C : top -c | grep app_service

D : service app_service status

Answer: A

Question 2

You need to find all occurrences of the term ‘error’ in ‘application.log’ and redirect both the output and errors from this operation to a file named ‘errors_found.txt’. Which command should you use?

A : grep 'error' application.log > errors_found.txt

B : grep 'error' application.log 2>&1 errors_found.txt

C : grep 'error' application.log &> errors_found.txt

D : grep 'error' application.log > errors_found.txt 2>&1

Answer: D

Question 3

How would you display the differences in content between two configuration files, ‘config_old.txt’ and ‘config_new.txt’, highlighting only the lines that have been added or changed in ‘config_new.txt’?

A : diff config_old.txt config_new.txt

B : diff -u config_old.txt config_new.txt

C : comm -3 config_old.txt config_new.txt

D : diff -Naur config_old.txt config_new.txt

Answer: D

Question 4

When transitioning to a GitOps workflow for a cloud-native application, a DevOps team debates how best to manage configuration changes to their Kubernetes clusters. Which change management model should they employ to ensure configurations are consistently applied and easily auditable in alignment with GitOps practices?

A : Manual Intervention Model, requiring operations team members to apply changes directly using kubectl commands

B : Infrastructure as Code (IaC) Model, storing configuration files in Git repositories and applying changes through automated pipelines

C : Scheduled Updates Model, applying changes at fixed intervals regardless of the state of the repository

D : Centralized Command Center Model, using a single dashboard for manual updates by authorized personnel

Answer: B

Question 5

To configure a static IP address of 192.168.1.50 on a network interface named ‘eth0’ on a Linux system using the NetworkManager command-line tool (nmcli), which command should you use?

A : nmcli con add con-name eth0 ifname eth0 type ethernet ip4 192.168.1.50/24

B : nmcli device modify eth0 ipv4.addresses 192.168.1.50/24

C : nmcli con modify eth0 ipv4.addresses 192.168.1.50/24 ipv4.method manual

D : ifconfig eth0 192.168.1.50 netmask 255.255.255.0 up

Answer: C

Page: 1 / 40

Total 200 Questions | Updated On: Jan 05, 2026

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