mediumMultiple SelectObjective-mapped
XK0-006 Practice Question: Ensure that a web service starts after the…
An administrator wants to ensure that a web service starts after the database service has fully initialized. Which TWO methods can be used to achieve this ordering dependency in systemd?
⚠ Common exam trap
The trap here is that candidates often pick only `After=` (option B) thinking it alone enforces the dependency, forgetting that `After=` only orders startup and does not prevent the web service from starting if the database fails — the exam expects the combination of `Requires=` and `After=` to fully satisfy the 'starts after and depends on' requirement.
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
✓
Add Requires=db.service in the [Unit] section
`Requires=db.service` in the `[Unit]` section declares a strong dependency: if `db.service` fails to start, `web.service` will not be started. Option B is correct because `After=db.service` in the `[Unit]` section of `web.service` ensures that `web.service` starts only after `db.service` has reached the 'active' state, enforcing the required ordering. Together, these two directives guarantee both dependency and sequencing.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Add Requires=db.service in the [Unit] section
Why this is correct
Makes db.service a required dependency; together with After, it ensures ordering.
- ✓
Add After=db.service in the [Unit] section of web.service
Why this is correct
Specifies that web.service should be started after db.service.
- ✗
Add BindsTo=db.service in the [Unit] section
Why it's wrong here
BindsTo ties the lifecycle; stopping db stops web, but ordering is not guaranteed.
- ✗
Add Wants=db.service in the [Unit] section
Why it's wrong here
Wants is a weak dependency; db.service may not start.
- ✗
Add PartOf=db.service in the [Unit] section
Why it's wrong here
PartOf is used for stopping/restarting together, not ordering.
Go deeper
Related to this question
Learn chapter
File Permissions and Ownership
Key term
systemd
systemd is a system and service manager for Linux operating systems that initializes and manages processes, services, and system resources after the kernel boots.
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.