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.
A development team is designing a new microservices application to run on a Kubernetes cluster. They want to ensure that each microservice can be developed, deployed, and scaled independently. Which cloud native architecture principle are they primarily applying?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Loose coupling
The principle of loose coupling ensures that each microservice can be developed, deployed, and scaled independently by minimizing dependencies between services. In Kubernetes, this is achieved through well-defined APIs and service boundaries, allowing teams to update or scale one service without affecting others. This directly supports the team's goal of independent lifecycle management for each microservice.
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.
✓
Loose coupling
Why this is correct
Loose coupling allows services to be developed, deployed, and scaled independently.
Related concept
Read the scenario before looking for a memorised answer.
✗
Immutable infrastructure
Why it's wrong here
Immutable infrastructure means servers are never modified after deployment, not about service independence.
✗
Statelessness
Why it's wrong here
Statelessness refers to applications not storing state between requests, not to independent deployability.
✗
Service discovery
Why it's wrong here
Service discovery is a mechanism for finding service endpoints, not an architectural principle.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse 'statelessness' with 'loose coupling' because both enable scaling, but statelessness is about session data management, not the architectural independence of service development and deployment.
Detailed technical explanation
How to think about this question
Loose coupling in Kubernetes is often implemented via service meshes (e.g., Istio) that handle traffic routing, retries, and circuit breaking without modifying application code. Under the hood, Kubernetes Services and EndpointSlices provide stable virtual IPs and DNS names, decoupling consumers from the actual Pod IPs that change during scaling or rolling updates. A real-world scenario is a payment service that can be scaled to 10 replicas without the order service needing to know, because the order service only references the payment service's ClusterIP or DNS name.
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: Loose coupling — The principle of loose coupling ensures that each microservice can be developed, deployed, and scaled independently by minimizing dependencies between services. In Kubernetes, this is achieved through well-defined APIs and service boundaries, allowing teams to update or scale one service without affecting others. This directly supports the team's goal of independent lifecycle management for each microservice.
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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