20+ practice questions focused on Application Design and Build — one of the most tested topics on the Certified Kubernetes Application Developer CKAD exam. Each question includes a detailed explanation so you learn why the right answer is correct.
Start Application Design and Build PracticeA developer needs to expose a deployment named 'web-app' running on port 8080 to external traffic. The cluster is on-premises with no cloud load balancer. Which service type should be used?
Explanation: (NodePort) is correct because it exposes a service on a static port on each node's IP address, allowing external traffic to reach the 'web-app' deployment on port 8080 without requiring a cloud load balancer. In on-premises clusters, NodePort is the standard service type for external access when no cloud LB is available, as it opens a high-port (30000-32767) on every node that forwards traffic to the ClusterIP service.
A developer is creating a ConfigMap from a file named 'app.properties'. The file contains key-value pairs. Which command correctly creates the ConfigMap with keys matching the file content?
Explanation: The file 'app.properties' contains key-value pairs. To create a ConfigMap with keys that match the keys in the file, use `kubectl create configmap my-config --from-env-file=app.properties`. This parses the file and creates one data entry per key=value line. Option A (`--from-file=app.properties`) stores the entire file content as a single value under the key 'app.properties', which does not produce keys matching the file content. Option B uses `--from-literal` incorrectly, and option C reads from stdin but still treats the input as a single file, not as key-value pairs.
Which TWO statements are true about Kubernetes Secrets?
Explanation: Kubernetes Secrets store data as base64-encoded strings in YAML manifests. This encoding is not encryption; it simply converts binary or non-printable data into an ASCII string format for safe inclusion in YAML. The base64 encoding is a standard practice for representing arbitrary data in Kubernetes resource definitions.
Which THREE are valid reasons to use a StatefulSet instead of a Deployment?
Explanation: StatefulSet assigns each pod a stable, unique network identity (e.g., a hostname like `web-0`, `web-1`) via a headless Service, which is critical for stateful applications like databases that rely on consistent DNS names for clustering and discovery. Deployments create pods with random, ephemeral hostnames, making them unsuitable for workloads requiring predictable network identities.
A developer is designing a Job that should run exactly once and then stop. The Job runs a batch process that is expected to complete within one hour. Which restartPolicy and backoffLimit are appropriate?
Explanation: A Job designed to run exactly once and stop should use `restartPolicy: OnFailure` or `Never`, and `backoffLimit: 4` provides a reasonable number of retries (up to 4) before the Job is marked as Failed, ensuring the batch process can recover from transient errors within the expected one-hour completion window. The `restartPolicy: Always` is invalid for Jobs (only `OnFailure` or `Never` are allowed), and `backoffLimit: 0` would prevent any retries, which is too restrictive for a batch process that may encounter temporary failures.
+15 more Application Design and Build questions available
Practice all Application Design and Build questions1. Baseline your knowledge
Start with 10 questions to gauge your current understanding of Application Design and Build. This tells you whether you need a concept refresher or just practice.
2. Review every explanation
For each question — right or wrong — read the full explanation. Understanding why an answer is correct is more valuable than knowing the answer itself.
3. Focus on exam traps
Application Design and Build questions on the CKAD frequently use trap wording. Look for subtle differences in answers that test your precision, not just general knowledge.
4. Reach 80% consistently
Do repeated sessions until you score 80%+ three times in a row. Then move to mixed-mode practice to test cross-topic recall under realistic conditions.
The exact number varies per candidate. Application Design and Build is tested as part of the Certified Kubernetes Application Developer CKAD blueprint. Practicing with targeted Application Design and Build questions ensures you can handle any format or difficulty that appears.
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Difficulty is subjective, but Application Design and Build is a high-priority exam concept tested in multiple ways — direct recall, scenario analysis, and command-output interpretation. Consistent practice is the best way to build confidence.
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