KCNA Container Orchestration Practice Question
Which THREE of the following are key characteristics of microservices architecture?
⚠ Common exam trap
A common misconception is that microservices can share a single database or persistent volume in Kubernetes for simplicity. However, each service should own its data to maintain loose coupling and independent deployability within a Kubernetes cluster.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Independent deployment of services
Microservices architecture mandates that each service can be independently deployed, updated, and scaled without affecting other services. This is achieved through separate deployment pipelines, containerization (e.g., Docker), and orchestration platforms like Kubernetes that manage service lifecycles independently. Independent deployment enables continuous delivery and reduces the blast radius of changes.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Independent deployment of services
Why this is correct
Each microservice can be deployed independently.
- ✓
Decomposition by business capability
Why this is correct
Services are organized around business functions.
- ✗
Single monolithic codebase
Why it's wrong here
Monolithic is the opposite of microservices.
- ✗
Shared database schema across services
Why it's wrong here
Microservices often use separate databases per service.
- ✓
Loose coupling between services
Why this is correct
Services are independent and loosely coupled.
Quick reference
AAA Protocol Comparison
| Protocol | Port(s) | Encryption | Transport | Primary Use |
|---|---|---|---|---|
| RADIUS | 1812 / 1813 | Password only | UDP | Network access control |
| TACACS+ | 49 | Full packet | TCP | Device administration |
| Diameter | 3868 | Full session | TCP / SCTP | Carrier / mobile networks |
| 802.1X | — | EAP-based | Layer 2 | Port-based access control |
TACACS+ encrypts the entire packet; RADIUS only encrypts the password field — a key exam distinction.
Go deeper
Related to this question
Learn chapter
Cloud Native Architecture and Concepts
Key term
ReplicaSet and Replication
A ReplicaSet ensures a specified number of identical pod instances are running at all times in Kubernetes, using replication to maintain availability and stability.
Key term
Microservices Architecture
Microservices architecture is a way of building software as a collection of small, independent services that each handle one specific business function and communicate over a network.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This KCNA 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 KCNA exam.