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.
Which TWO of the following are valid parameters for configuring probes in Kubernetes? (Select TWO.)
intervalSeconds
Why wrong: The correct parameter is periodSeconds.
initialDelaySeconds
Valid parameter to delay the first probe.
retryCount
Why wrong: Not a valid Kubernetes probe parameter.
failureThreshold
Valid parameter to define consecutive failures before action.
readinessProbe
Why wrong: This is a probe type, not a parameter.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
initialDelaySeconds
Option B is correct because `initialDelaySeconds` is a valid field in a Kubernetes probe configuration (liveness, readiness, or startup probe). It specifies the number of seconds to wait after the container starts before initiating the first probe, allowing the application to initialize before being checked.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
intervalSeconds
Why it's wrong here
The correct parameter is periodSeconds.
initialDelaySeconds
Why this is correct
Valid parameter to delay the first probe.
Related concept
Read the scenario before looking for a memorised answer.
retryCount
Why it's wrong here
Not a valid Kubernetes probe parameter.
failureThreshold
Why this is correct
Valid parameter to define consecutive failures before action.
Related concept
Read the scenario before looking for a memorised answer.
readinessProbe
Why it's wrong here
This is a probe type, not a parameter.
Common exam traps
The trap here is that candidates confuse the naming convention of probe parameters (e.g., `intervalSeconds` vs `periodSeconds`, `retryCount` vs `failureThreshold`) or mistake a top-level probe field like `readinessProbe` for a parameter within the probe configuration.
Detailed technical explanation
Kubernetes probes are configured under `livenessProbe`, `readinessProbe`, or `startupProbe` in the container spec, each supporting fields like `initialDelaySeconds`, `periodSeconds`, `timeoutSeconds`, `successThreshold`, and `failureThreshold`. The `failureThreshold` defaults to 3, meaning after three consecutive failures the probe is considered failed, triggering a restart (for liveness) or removal from service (for readiness). Understanding these defaults is critical for tuning probe behavior in production environments.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
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.
What to study next
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
Application Observability and Maintenance — This question tests Application Observability and Maintenance — Read the scenario before looking for a memorised answer..
The correct answer is: initialDelaySeconds — Option B is correct because `initialDelaySeconds` is a valid field in a Kubernetes probe configuration (liveness, readiness, or startup probe). It specifies the number of seconds to wait after the container starts before initiating the first probe, allowing the application to initialize before being checked.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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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