LFCS Service Configuration Practice Question
Exhibit
● systemctl status myapp.service ● myapp.service - My Application Loaded: loaded (/etc/systemd/system/myapp.service; disabled; vendor preset: disabled) Active: inactive (dead) Docs: man:myapp(1) ● systemctl list-dependencies myapp.service ● myapp.service ● myapp.service does not have any dependencies.
Refer to the exhibit. An administrator tries to start myapp.service with 'systemctl start myapp.service' but receives 'Failed to start myapp.service: Unit myapp.service is not loaded properly: Invalid argument'. What is the most likely issue?
⚠ Common exam trap
Linux Foundation often tests the distinction between loading-phase errors (syntax, invalid argument) and runtime errors (execution failures, missing binaries), causing candidates to confuse a malformed unit file with a broken ExecStart path.
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
✓
The unit file has a syntax error.
The error 'Unit myapp.service is not loaded properly: Invalid argument' indicates that systemd attempted to parse the unit file but encountered a syntax error or an invalid directive. This typically happens when a key-value pair in the unit file is malformed, such as a missing equals sign, an unsupported option, or a value that does not conform to systemd's expected format. Unlike a runtime failure (e.g., a missing ExecStart binary), this error occurs during the loading phase, before any execution attempt.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
The unit file has a syntax error.
Why this is correct
'Invalid argument' indicates the unit file contains an incorrect directive or value.
- ✗
The service name is misspelled.
Why it's wrong here
A misspelled name would result in 'Unit not found'.
- ✗
The ExecStart path is invalid.
Why it's wrong here
An invalid ExecStart would produce a different error, like 'Executable not found'.
- ✗
The service is masked.
Why it's wrong here
Masked units show 'masked' in status and 'Failed to start... Unit is masked'.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This LFCS practice question is part of Courseiva's free Linux Foundation 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 LFCS exam.