The answer is Business Critical with zone redundancy and a failover group. This configuration meets the 99.99% availability SLA because zone-redundant Business Critical replicates your database across three Azure availability zones within a single region, while the failover group enables automated, fast failover to a secondary region within 30 seconds. Additionally, Business Critical provides a readable secondary replica, which offloads reporting workloads without impacting the primary database. On the DP-300 exam, this scenario tests your understanding of how service tiers map to specific SLA guarantees and read-scale features; a common trap is choosing General Purpose for its lower cost, but it lacks a readable secondary and does not support zone redundancy for the 99.99% SLA. Remember the mnemonic “BCR-FG” for Business Critical, zone Redundancy, and Failover Group—the three pillars that together deliver high availability, fast failover, and read-scale.
DP-300 Plan and implement data platform resources Practice Question
This DP-300 practice question tests your understanding of plan and implement data platform resources. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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.
You are designing a new Azure SQL Database deployment for a mission-critical application. The application requires 99.99% availability SLA, automated failover within 30 seconds, and read-scale capability for reporting. Which tier and configuration should you choose?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Business Critical with zone redundancy and a failover group
Business Critical with zone redundancy and a failover group meets all requirements: 99.99% SLA (supported by zone-redundant Business Critical), automated failover within 30 seconds (failover groups provide automatic, fast failover across regions), and read-scale capability (Business Critical includes a readable secondary replica).
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.
✓
Business Critical with zone redundancy and a failover group
Why this is correct
Business Critical provides zone-redundant high availability, automatic failover, and readable secondaries for reporting.
Related concept
Read the scenario before looking for a memorised answer.
✗
General Purpose serverless with geo-replication
Why it's wrong here
Serverless is not for mission-critical, and geo-replication does not provide automatic failover within 30 seconds.
✗
General Purpose with active geo-replication and read-scale
Why it's wrong here
General Purpose does not have readable secondaries; active geo-replication does not guarantee 30-second failover.
✗
Hyperscale with zone redundancy enabled
Why it's wrong here
Hyperscale does not support zone redundancy for high availability regarding Business Critical.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates confuse 'read-scale' with 'geo-replication read-only secondary' — only Business Critical and Hyperscale offer a built-in readable secondary replica, while General Purpose requires a separate geo-replicated secondary for read-only access, which does not meet the 30-second failover requirement.
Detailed technical explanation
How to think about this question
Business Critical uses a quorum-based commit model with three synchronous replicas in a single region; zone redundancy distributes these replicas across availability zones, ensuring 99.99% SLA even during a zone outage. Failover groups leverage the auto-failover policy with a grace period (default 1 hour, configurable down to 1 minute) to trigger automatic failover within 30 seconds when combined with a short grace period and health probe interval. The readable secondary replica in Business Critical is a synchronous replica that can serve read-only queries without impacting primary write performance, ideal for reporting workloads.
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 media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this DP-300 question in full detail.
Plan and implement data platform resources — This question tests Plan and implement data platform resources — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Business Critical with zone redundancy and a failover group — Business Critical with zone redundancy and a failover group meets all requirements: 99.99% SLA (supported by zone-redundant Business Critical), automated failover within 30 seconds (failover groups provide automatic, fast failover across regions), and read-scale capability (Business Critical includes a readable secondary replica).
What should I do if I get this DP-300 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.
About these practice questions
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Variation 1. You are deploying an Azure SQL Database for a new application that requires high availability with automatic failover within the same region. The database must be able to recover from a zonal failure without data loss. Which deployment option should you use?
easy
A.Hyperscale tier with zone redundancy
B.Standard tier with failover group
✓ C.Business Critical tier with zone redundancy enabled
D.Basic tier with active geo-replication
Why C: The Business Critical tier with zone redundancy enabled provides the highest level of availability within a single Azure region by synchronously replicating data across three different availability zones. This ensures that if one zone fails, automatic failover occurs with no data loss because all transactions are committed to at least two replicas before being acknowledged. This meets the requirement for zonal failure recovery without data loss.
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Question Discussion
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