DS0-001 Database Planning And Deployment Practice Question
A company is designing a distributed NoSQL database deployment using MongoDB. They need to ensure high availability and automatic failover in the event that a primary node becomes unreachable. What must the architect configure to achieve this?
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
✓
Deploy a MongoDB Replica Set with at least three nodes.
A Replica Set provides automatic failover by electing a new primary when the existing primary fails.
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 database mirroring using the primary-secondary synchronous replication setting.
Why it's wrong here
MongoDB does not use the terminology 'database mirroring' in this context.
- ✗
Increase the write concern to 'all' to force nodes to write simultaneously.
Why it's wrong here
Write concern impacts data durability but does not manage failover mechanics.
- ✗
Configure a sharded cluster with a single mongos instance.
Why it's wrong here
A single mongos instance creates a single point of failure.
- ✓
Deploy a MongoDB Replica Set with at least three nodes.
Why this is correct
A replica set provides redundancy and automatic election of a new primary node.
About these practice questions
This DS0-001 question is part of Courseiva's 216-question bank — original exam-style content with full explanations and wrong-answer analysis, never real exam questions or exam dumps. Learn why practice questions differ from exam dumps →
JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed August 2026 · checked against the official CompTIA exam blueprint
This DS0-001 practice question is part of Courseiva's free CompTIA 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 DS0-001 exam.