This KCNA practice question tests your understanding of cloud native architecture. 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 TWO practices are recommended for designing cloud-native microservices? (Choose 2)
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Implement health check endpoints for each service.
Option C is correct because health check endpoints (e.g., /healthz or /ready) are a fundamental pattern in cloud-native microservices. They allow orchestration platforms like Kubernetes to perform liveness and readiness probes, ensuring that traffic is only routed to healthy instances and that unhealthy pods are automatically restarted. This aligns with the cloud-native principle of designing for resilience and self-healing.
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.
✗
Share a common database schema across all services.
Why it's wrong here
Shared schema creates coupling; each service should own its data.
✗
Store configuration in environment variables inside the container image.
Why it's wrong here
Configuration should be externalized, not baked into images.
✓
Implement health check endpoints for each service.
Why this is correct
Health checks enable orchestration platforms to manage service lifecycle.
Related concept
Read the scenario before looking for a memorised answer.
✗
Use synchronous HTTP calls for all inter-service communication.
Why it's wrong here
Excessive synchronous calls can cause cascading failures; async messaging is often better.
✓
Design services around business capabilities.
Why this is correct
Bounded context aligns services with business domains.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse 'configuration in environment variables' (which is acceptable when injected at runtime) with 'storing configuration inside the container image' (which is an anti-pattern), leading them to incorrectly select Option B.
Detailed technical explanation
How to think about this question
Health check endpoints typically expose two types: liveness probes (to detect if the process is stuck or deadlocked) and readiness probes (to indicate if the service is ready to accept traffic). Kubernetes executes these probes via HTTP GET, TCP socket, or command execution, with configurable initial delay, period, and failure thresholds. In practice, a readiness probe might check if a database connection pool is initialized, while a liveness probe might verify the application's main event loop is responsive, preventing the pod from being prematurely terminated.
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 KCNA question in full detail.
Cloud Native Architecture — This question tests Cloud Native Architecture — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Implement health check endpoints for each service. — Option C is correct because health check endpoints (e.g., /healthz or /ready) are a fundamental pattern in cloud-native microservices. They allow orchestration platforms like Kubernetes to perform liveness and readiness probes, ensuring that traffic is only routed to healthy instances and that unhealthy pods are automatically restarted. This aligns with the cloud-native principle of designing for resilience and self-healing.
What should I do if I get this KCNA 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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