This KCNA practice question tests your understanding of container orchestration. 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 THREE of the following are characteristics of a microservices architecture? (Select 3)
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Loose coupling between services
Option B is correct because microservices architecture emphasizes loose coupling, where each service communicates via well-defined APIs (e.g., REST, gRPC) and does not share internal implementation details. This allows services to evolve independently without affecting others, which is a core principle of the architecture.
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.
✗
Services share the same database schema
Why it's wrong here
Microservices often have their own databases.
✓
Loose coupling between services
Why this is correct
Services communicate via APIs, reducing dependencies.
Related concept
Read the scenario before looking for a memorised answer.
✓
Independent deployment of services
Why this is correct
Each service can be deployed independently.
Related concept
Read the scenario before looking for a memorised answer.
✗
All services are packaged in a single monolithic deployment
Why it's wrong here
That's monolithic, not microservices.
✓
Decomposition of application into small, independent services
Why this is correct
Microservices break down the app into small services.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
CNCF often tests the misconception that microservices share a database or are deployed as a single unit, confusing them with monolithic or service-oriented architectures (SOA) that may share schemas.
Detailed technical explanation
How to think about this question
Under the hood, microservices rely on bounded contexts from Domain-Driven Design (DDD) to define service boundaries, and each service exposes an API gateway or service mesh (e.g., Istio) for inter-service communication. In Kubernetes, this is implemented via Deployments and Services, where each microservice runs in its own Pod and scales independently based on resource metrics. A real-world scenario is Netflix, which uses microservices to deploy thousands of services independently, enabling rapid feature updates without global downtime.
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 practitioner preparing for the KCNA 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.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this KCNA question in full detail.
Container Orchestration — This question tests Container Orchestration — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Loose coupling between services — Option B is correct because microservices architecture emphasizes loose coupling, where each service communicates via well-defined APIs (e.g., REST, gRPC) and does not share internal implementation details. This allows services to evolve independently without affecting others, which is a core principle of the architecture.
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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