- A
Use a HTTP GET liveness probe with path /healthz and port 8080
Why wrong: This is a type of liveness probe, not a solution to the slow startup problem; it would still probe too early.
- B
Set livenessProbe.initialDelaySeconds to 300
Why wrong: While this delays the liveness probe, it does not account for variability in startup time and may still fail if the container takes longer than expected.
- C
Configure a startup probe with a high failureThreshold and appropriate initialDelaySeconds
A startup probe delays liveness and readiness checks until the container has started successfully, preventing premature restarts.
- D
Set livenessProbe.periodSeconds to a high value, like 300
Why wrong: This only increases the interval between checks, not the initial delay. The first check may occur before the container is ready.
CKAD Application Observability and Maintenance Practice Question
This CKAD practice question tests your understanding of application observability and maintenance. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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.
You have a Deployment that must run a legacy application that takes up to 5 minutes to start. You need to ensure the liveness probe does not kill the container prematurely. Which probe configuration should you use?
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
Configure a startup probe with a high failureThreshold and appropriate initialDelaySeconds
Option C is correct because a startup probe is specifically designed for slow-starting containers. It runs before the liveness probe and allows the container extra time to initialize without being killed. By setting a high failureThreshold (e.g., 30) and an appropriate initialDelaySeconds, the probe can wait up to 5 minutes for the application to start, after which the liveness probe takes over.
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.
- ✗
Use a HTTP GET liveness probe with path /healthz and port 8080
Why it's wrong here
This is a type of liveness probe, not a solution to the slow startup problem; it would still probe too early.
- ✗
Set livenessProbe.initialDelaySeconds to 300
Why it's wrong here
While this delays the liveness probe, it does not account for variability in startup time and may still fail if the container takes longer than expected.
- ✓
Configure a startup probe with a high failureThreshold and appropriate initialDelaySeconds
Why this is correct
A startup probe delays liveness and readiness checks until the container has started successfully, preventing premature restarts.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Set livenessProbe.periodSeconds to a high value, like 300
Why it's wrong here
This only increases the interval between checks, not the initial delay. The first check may occur before the container is ready.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse initialDelaySeconds with a solution for slow starts, but it only delays the first probe and does not prevent the liveness probe from killing the container if the app takes longer than the sum of initialDelaySeconds and the failure threshold interval.
Detailed technical explanation
How to think about this question
Startup probes are defined in the Kubernetes API under spec.containers.startupProbe and are executed first, with the liveness probe disabled until the startup probe succeeds. This allows the container to have a separate, more lenient failure threshold (e.g., failureThreshold: 30 with periodSeconds: 10 gives 300 seconds total) without affecting the responsiveness of the liveness probe once the app is running. In real-world scenarios, legacy Java applications or databases with long initialization times benefit from this pattern, as it avoids the need to set artificially high liveness probe thresholds that would delay detection of runtime failures.
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.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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FAQ
Questions learners often ask
What does this CKAD question test?
Application Observability and Maintenance — This question tests Application Observability and Maintenance — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Configure a startup probe with a high failureThreshold and appropriate initialDelaySeconds — Option C is correct because a startup probe is specifically designed for slow-starting containers. It runs before the liveness probe and allows the container extra time to initialize without being killed. By setting a high failureThreshold (e.g., 30) and an appropriate initialDelaySeconds, the probe can wait up to 5 minutes for the application to start, after which the liveness probe takes over.
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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Last reviewed: Jun 25, 2026
This CKAD practice question is part of Courseiva's free CNCF 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 CKAD exam.
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