SAP-C02 Continuous Improvement for Existing Solutions Practice Question
A company is migrating from a monolithic application to microservices on AWS. They need to reduce the blast radius of failures. Which architecture pattern should they implement?
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
✓
Use a cell-based architecture where each microservice runs in isolated cells with independent data stores.
Cell-based architecture isolates failures to individual cells, reducing blast radius. Option A is wrong because sharing a data store creates a single point of failure. Option C is wrong because a single Application Load Balancer creates a single point of failure and bottleneck. Option D is wrong because a single Availability Zone and shared database are single points of failure.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Implement Auto Scaling groups for each microservice without separating data stores.
Why it's wrong here
Without data isolation, failures can propagate.
- ✓
Use a cell-based architecture where each microservice runs in isolated cells with independent data stores.
Why this is correct
Cell-based architecture isolates failures to one cell, reducing overall impact.
- ✗
Route all traffic through a single Application Load Balancer to simplify management.
Why it's wrong here
A single ALB is a single point of failure.
- ✗
Deploy all microservices in a single Availability Zone with a shared database.
Why it's wrong here
A single AZ and shared database increase blast radius.
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
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This SAP-C02 practice question is part of Courseiva's free Amazon Web Services 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 SAP-C02 exam.