406 questions with instant explanations, domain breakdown, and wrong-answer analysis. Built for the real exam.
This is exactly what you see during practice — question, options, and a full explanation after you answer.
A system administrator notices that a web server is not reachable from the internet but is reachable from the internal network. The server's IP is 10.0.1.10/24, and the gateway is 10.0.1.1. Which command should be used to verify the default gateway configuration?
The `ip route show` command displays the kernel routing table, including the default gateway entry. Since the server is reachable internally but not from the internet, a missing or incorrect default gateway is the likely cause. This command directly verifies whether a default rou…Read full explanation
An administrator runs 'systemctl status sshd' and sees the output above. The administrator wants sshd to start automatically at boot. Which command should be used?
The `systemctl enable sshd` command creates the necessary symlinks in the systemd unit configuration directories (e.g., `/etc/systemd/system/multi-user.target.wants/`) so that the sshd service is started automatically at boot. This is the correct way to configure a service to sta…Read full explanation
A server runs a custom application that listens on TCP port 8080. The administrator wants to ensure the application starts automatically on boot and restarts if it crashes. Which systemd unit file directive should be used to achieve the restart behavior?
The `Restart=on-failure` directive in a systemd unit file instructs systemd to automatically restart the service unit when it exits with a non-zero exit code, is terminated by a signal (including SIGKILL), or times out. This directly satisfies the requirement for the application …Read full explanation
Answer at your own pace. Explanation and domain tag shown immediately after each answer.
Countdown timer starts immediately. Results and domain scores shown at the end — just like the real exam.
Full explanations on every question
Not just the right answer — you get exactly why each wrong option is wrong, so you learn the concept, not the answer.
Domain score breakdown
After each session see your score by exam domain so you know exactly where to focus study time.
100% free, forever
No subscription, no trial, no email wall. Start a session in under 10 seconds.
Exam-style questions
Scenario-based, precise wording, realistic distractors — written to match what you actually see on exam day.