XK0-005 Scripting, Containers and Automation Practice Question
This XK0-005 practice question tests your understanding of scripting, containers and automation. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A system administrator is troubleshooting a bash script that fails when run from cron but works when run from the terminal. Which two factors could explain this behavior? (Select TWO.)
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The script uses interactive commands
Option A is correct because interactive commands (e.g., `read`, `select`, or commands that require a TTY) fail when run from cron, as cron does not allocate a terminal. The script expects user input or terminal interaction, which is not available in the cron environment, causing it to hang or error out. Option E is correct because cron runs with a minimal PATH (often `/usr/bin:/bin`), so the script may fail to locate commands that are found in the user's interactive shell PATH (e.g., `/usr/local/bin`).
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
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 script uses interactive commands
Why this is correct
Commands like read, vi, or those requiring a terminal fail non-interactively.
Related concept
Read the scenario before looking for a memorised answer.
✗
The script uses a different shell interpreter
Why it's wrong here
The shebang line defines the interpreter; cron uses the same if defined.
✗
The script uses absolute paths
Why it's wrong here
Using absolute paths reduces PATH-related issues and would not cause failure.
✗
The script runs with a different user ID
Why it's wrong here
If the same user runs both, user ID is same. Even if different, it would typically cause permission errors, not complete failure.
✓
Different PATH environment variable
Why this is correct
Cron typically has a limited PATH, causing commands to not be found unless full paths are used.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
CompTIA often tests the misconception that cron runs scripts with the same environment as the user's interactive shell, leading candidates to overlook PATH and interactive command issues in favor of user ID or interpreter differences.
Detailed technical explanation
How to think about this question
Cron jobs execute in a non-interactive, non-login shell with a stripped-down environment. The `env` command run from cron shows only a few variables (HOME, LOGNAME, SHELL, PATH), whereas an interactive shell inherits many more (e.g., LANG, LS_COLORS, custom aliases). A common real-world scenario is a script that calls `aws` or `docker` commands installed in `/usr/local/bin` — these fail silently in cron unless the PATH is explicitly set inside the script or crontab.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A small business has 20 workstations on the 192.168.1.0/24 network and one public IP from its ISP. The router uses PAT (NAT overload) so all 20 devices share one public address using different source ports. NAT questions test whether you understand the four address terms and which direction each translation applies.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this XK0-005 question in full detail.
Scripting, Containers and Automation — This question tests Scripting, Containers and Automation — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The script uses interactive commands — Option A is correct because interactive commands (e.g., `read`, `select`, or commands that require a TTY) fail when run from cron, as cron does not allocate a terminal. The script expects user input or terminal interaction, which is not available in the cron environment, causing it to hang or error out. Option E is correct because cron runs with a minimal PATH (often `/usr/bin:/bin`), so the script may fail to locate commands that are found in the user's interactive shell PATH (e.g., `/usr/local/bin`).
What should I do if I get this XK0-005 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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