XK0-006 Troubleshooting Practice Question
An administrator is troubleshooting a service that fails to start with a 'Permission denied' error. The administrator runs `strace -f -o /tmp/strace.log systemctl start myservice`. Which of the following best describes what this command achieves?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
It traces system calls for systemctl and its children, recording them to a file.
strace traces system calls; -f follows child processes; -o writes output to file.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
It records the kernel messages related to the service start.
Why it's wrong here
That would be dmesg or journalctl, not strace.
- ✓
It traces system calls for systemctl and its children, recording them to a file.
Why this is correct
Correct: strace traces syscalls, -f follows forks, -o outputs to file.
- ✗
It monitors network connections opened by the service.
Why it's wrong here
Strace can show network syscalls but not specifically monitor connections.
- ✗
It traces library calls made by the service startup.
Why it's wrong here
That would be ltrace, not strace.
Go deeper
Related to this question
Learn chapter
File Permissions and Ownership
Key term
systemctl
systemctl is the command-line tool used to inspect, start, stop, enable, or disable services managed by the systemd init system in Linux.
Key term
Service
A service is a software component or system that performs a specific function and is available to be used by other programs or users over a network.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This XK0-006 practice question is part of Courseiva's free CompTIA certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the XK0-006 exam.