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. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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 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?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Business Critical tier with zone redundancy enabled
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.
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.
✗
Hyperscale tier with zone redundancy
Why it's wrong here
Hyperscale zone redundancy does not guarantee zero data loss for all scenarios.
✗
Standard tier with failover group
Why it's wrong here
Standard tier does not support zone redundancy.
✓
Business Critical tier with zone redundancy enabled
Why this is correct
Business Critical tier with zone redundancy provides zonal failover with zero data loss.
Related concept
Read the scenario before looking for a memorised answer.
✗
Basic tier with active geo-replication
Why it's wrong here
Basic tier does not support zone redundancy.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse zone redundancy with geo-replication, assuming that any tier with failover groups or geo-replication can handle zonal failures, but only zone-redundant configurations within the same region guarantee zero data loss during a zonal outage.
Trap categories for this question
Scenario analysis trap
Hyperscale zone redundancy does not guarantee zero data loss for all scenarios.
Detailed technical explanation
How to think about this question
Under the hood, the Business Critical tier uses a quorum-based commit model where a transaction must be written to the primary replica and at least one secondary replica in a different availability zone before being acknowledged to the client. This synchronous replication ensures RPO=0 during a zonal failure, as the secondary replicas are fully up-to-date. In a real-world scenario, if a power outage takes down an entire zone, the database automatically fails over to a secondary replica in another zone within seconds, with no data loss and minimal downtime.
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 tier with zone redundancy enabled — 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.
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.
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Question Discussion
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