CKAD Application Design and Build Practice Question
This CKAD practice question tests your understanding of application design and build. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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.
Which THREE options are valid fields in a CronJob spec? (Select 3)
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
.spec.successfulJobsHistoryLimit
Option B is correct because `.spec.successfulJobsHistoryLimit` is a valid field in a CronJob spec that controls how many completed jobs are retained for inspection. This field defaults to 3 and helps manage cluster resource usage by limiting the number of successful job records kept in the history.
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.
This is a Pod spec field, not directly in CronJob spec.
✓
.spec.successfulJobsHistoryLimit
Why this is correct
Valid CronJob field to limit history.
Related concept
Read the scenario before looking for a memorised answer.
✓
.spec.schedule
Why this is correct
Required CronJob field for cron expression.
Related concept
Read the scenario before looking for a memorised answer.
✓
.spec.concurrencyPolicy
Why this is correct
Valid CronJob field: Allow, Forbid, Replace.
Related concept
Read the scenario before looking for a memorised answer.
✗
.spec.jobTemplate.spec.parallelism
Why it's wrong here
This is a Job field, part of jobTemplate, but the question asks for fields in CronJob spec directly.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates confuse fields that belong to the CronJob spec with fields that belong to the underlying Job spec, such as `parallelism` or `restartPolicy`, which are valid in a Job but not directly in the CronJob spec's top-level fields.
Detailed technical explanation
How to think about this question
The CronJob controller creates Job objects based on the `schedule` and uses the `jobTemplate` to define the Job's spec. The `successfulJobsHistoryLimit` and `failedJobsHistoryLimit` fields are part of the CronJob spec to control garbage collection of old Job objects, preventing etcd from being overwhelmed with historical records. In a real-world scenario, setting `successfulJobsHistoryLimit` to a low value like 1 is useful for batch processing pipelines where only the latest successful run matters for auditing.
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 practitioner preparing for the CKAD exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this CKAD question in full detail.
Application Design and Build — This question tests Application Design and Build — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: .spec.successfulJobsHistoryLimit — Option B is correct because `.spec.successfulJobsHistoryLimit` is a valid field in a CronJob spec that controls how many completed jobs are retained for inspection. This field defaults to 3 and helps manage cluster resource usage by limiting the number of successful job records kept in the history.
What should I do if I get this CKAD 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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