Plan and configure a high availability and disaster recovery environment →easyMultiple ChoiceObjective-mapped
DP-300 Practice Question: Plan and configure a high availability and disaster recovery environment
You have an Azure SQL Database that uses the Business Critical service tier with zone redundancy enabled. The database is deployed in a single region. You want to ensure that if a zone fails, the database remains available with minimal downtime. How does zone redundancy 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
✓
It maintains multiple synchronous replicas in different availability zones within the region.
Zone redundancy for Azure SQL Database Business Critical tier maintains multiple synchronous replicas in different availability zones within the same region. If one zone fails, another replica automatically becomes the primary, ensuring minimal downtime. Option B is incorrect because read-only replicas are not promoted to primary; all replicas are read/write capable and failover is automatic. Option C is incorrect as it describes geo-replication to a secondary region, not zone redundancy. Option D is incorrect because replicas are kept synchronous, not asynchronous.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
It maintains multiple synchronous replicas in different availability zones within the region.
Why this is correct
Zone redundancy uses synchronous replicas across zones for automatic failover.
- ✗
It creates read-only replicas in other zones that can be promoted to primary.
Why it's wrong here
While replicas are readable, the key is synchronous replication and automatic failover.
- ✗
It replicates data to a secondary region for failover.
Why it's wrong here
Zone redundancy is within a region, not across regions.
- ✗
It uses asynchronous replication to a standby replica in another zone.
Why it's wrong here
Replication is synchronous to ensure no data loss.
Go deeper
Related to this question
Learn chapter
Overview of Azure Data Platform Options
Key term
Azure SQL Performance Tuning
Azure SQL Performance Tuning is the process of optimizing the speed and efficiency of queries and database operations in Microsoft Azure SQL Database or SQL Managed Instance to reduce latency and improve throughput.
About these practice questions
Courseiva writes every DP-300 question from scratch — 906 in total, each with an explanation and a wrong-answer breakdown. None are copied from real exams or dumps. Learn why practice questions differ from exam dumps →
JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This DP-300 practice question is part of Courseiva's free Microsoft 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 DP-300 exam.