How should I use these Troubleshooting practice questions?

Read each scenario carefully and choose your answer before revealing the explanation. Then check why your choice was right or wrong. Repeat until the reasoning feels automatic.

Can I practise just Troubleshooting questions in a focused session?

Yes — use the session launcher on this page to start a 10-, 20-, 30- or 50-question session drawn entirely from the Troubleshooting domain.

XK0-006 · topic practice

Troubleshooting practice questions

Practise CompTIA Linux+ (XK0-006) Troubleshooting practice questions — original exam-style scenarios with answer choices, explanations, and analysis of common mistakes.

Courseiva uses original exam-style practice questions designed for learning and revision. The goal is to understand the concepts, recognise exam patterns, and improve through explanations — not memorise copied exam dumps.

Reviewed byJohnson Ajibi· MSc IT Security

20 questionsDomain: Troubleshooting

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What the exam tests

What to know about Troubleshooting

Troubleshooting questions test whether you can apply the concept in context, not just recognise a definition.

How the topic appears in realistic exam-style scenarios.

Which detail in the question changes the correct answer.

How to eliminate plausible but wrong options.

How to connect the question back to the wider exam objective.

Watch out for

Common Troubleshooting exam traps

▸Answering from memory before reading the full scenario.
▸Missing a constraint such as cost, availability, security, scope or command context.
▸Choosing a broad answer when the question asks for the most specific fix.
▸Ignoring why the wrong options are tempting.

Practice set

Troubleshooting questions

20 questions · select your answer, then reveal the explanation

Question 1easymultiple choice

Read the full Troubleshooting explanation →

A user reports that they cannot reach a website. The administrator wants to check the path that packets take to the destination server. Which command should be used?

Trap 1: ip addr

ip addr shows IP addresses on the local host.

Trap 2: ss

ss shows socket statistics, not routing path.

Trap 3: ping

ping only tests connectivity, not the path.

Troubleshooting practice questions

What to know about Troubleshooting

Common Troubleshooting exam traps

Troubleshooting questions

A user reports that they cannot reach a website. The administrator wants to check the path that packets take to the destination server. Which command should be used?

A technician needs to perform a DNS query to retrieve the mail exchange (MX) record for example.com using a specific DNS server at 8.8.8.8. Which command accomplishes this?

A system administrator needs to collect performance data over time to analyze CPU and memory usage trends. Which THREE of the following commands can be used to gather historical performance data? (Choose THREE.)

A system administrator is troubleshooting a network issue and wants to use a tool that combines ping and traceroute functionality to identify packet loss and latency along the path. Which TWO tools can provide this combined functionality? (Choose two.)

A Linux administrator needs to check which services are listening on TCP ports on a server. Which command should be used to replace the deprecated netstat command?

A Linux engineer is investigating high disk I/O on a server. Which command provides disk I/O statistics including %util, await, r/s, and w/s?

During boot, a Linux system displays a kernel panic with 'VFS: Unable to mount root fs on unknown-block(0,0)'. Which of the following is the most likely cause?

An administrator needs to trace system calls made by a process that is misbehaving. Which command should be used to attach to the running process and display its system calls?

A user wants to look up the mail exchange (MX) records for a domain. Which command should be used?

An administrator wants to capture network traffic on interface eth0, writing the output to a file for later analysis, without resolving hostnames. Which command accomplishes this?

A system administrator needs to check the kernel ring buffer for hardware error messages. Which command should be used?

After modifying the network configuration on a RHEL 8 system, the administrator wants to bring up the interface without rebooting. Which command sequence should be used?

A technician needs to check the current memory usage on a Linux system, including buffers and cache. Which command provides the most user-friendly output?

A server is experiencing intermittent network connectivity issues. The administrator wants to run a continuous test that combines ping and traceroute to monitor the path and packet loss to a target host. Which command should be used?

An administrator needs to check the current routing table on a Linux system. Which command should be used?

A Linux administrator is troubleshooting a DNS resolution issue. The system uses /etc/resolv.conf. Which two of the following directives are commonly found in this file? (Choose two.)

A system fails to boot with a kernel panic. The administrator suspects a corrupt initramfs or missing kernel module. Which three methods could be used to recover the system? (Choose three.)

An administrator needs to identify which processes are consuming the most CPU and memory resources. Which two commands can provide this information? (Choose two.)

A Linux administrator needs to view all current IPv4 addresses assigned to network interfaces on a system. Which command should be used?

A user reports that they cannot access a web server at 192.168.1.100. The administrator wants to check if the server is reachable and measure round-trip time. Which command is most appropriate?

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Frequently asked questions

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Study resources

Exam traps to avoid