The answer is to create an auto-failover group with the primary in West US and add a readable secondary in North Europe, using synchronous commit. This configuration meets the requirement for a readable secondary replica for Azure SQL Managed Instance in another region because synchronous replication within the failover group ensures an RPO of less than 5 seconds—typically 0–2 seconds—while the readable secondary serves low-latency read-only traffic for European users. On the DP-300 exam, this scenario tests your understanding of combining disaster recovery with read scaling using auto-failover groups, a common trap being to confuse asynchronous commit (which increases RPO) with synchronous commit for strict RPO requirements. Remember that for readable secondaries in a failover group, synchronous commit is mandatory when you need near-zero data loss, while the secondary automatically handles read traffic without additional configuration. A helpful memory tip: “Sync for RPO, async for RTO” — synchronous commit prioritizes data loss prevention, while asynchronous commit prioritizes availability during a regional outage.
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. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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 a database administrator for a global e-commerce company. The company runs a critical transactional workload on an Azure SQL Managed Instance (MI) in the West US region. The database is approximately 1 TB in size and uses the Business Critical tier with zone redundancy enabled. The application requires read latency for reporting queries to be under 10 ms. The company is expanding to Europe and needs to deploy a secondary copy of the database in the North Europe region to serve read-only reporting traffic for European users. The secondary must be kept in sync with the primary with a recovery point objective (RPO) of less than 5 seconds. Additionally, the solution must support automatic failover if the primary region becomes unavailable. You need to design the disaster recovery and read scaling solution. Which approach should you take?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "primary"
Why it matters: Asks for the main purpose or function, not a secondary benefit. Eliminate answers that describe side-effects or partial functions.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Create an auto-failover group with the primary in West US and add a readable secondary in North Europe, using synchronous commit
Option C is correct because Azure SQL Managed Instance supports auto-failover groups with a readable secondary in a paired region. By configuring synchronous commit within the failover group, you achieve an RPO of less than 5 seconds (typically 0-2 seconds) while the secondary in North Europe can serve read-only traffic with low latency. The auto-failover group also provides automatic failover if the primary region becomes unavailable, meeting both the read scaling and disaster recovery requirements.
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.
✗
Create a geo-replica of the MI in North Europe and manually failover when needed
Why it's wrong here
Geo-replica does not automatically support low-latency reads and automatic failover.
✗
Deploy a separate managed instance in North Europe and use transactional replication to keep it in sync
Why it's wrong here
Transactional replication does not guarantee RPO < 5 seconds and does not support automatic failover.
✓
Create an auto-failover group with the primary in West US and add a readable secondary in North Europe, using synchronous commit
Why this is correct
This meets all requirements.
Clue confirmation
The clue word "primary" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
Create an auto-failover group with the primary in West US and secondary in North Europe, but do not make the secondary readable
Why it's wrong here
Without readable secondary, read queries cannot be offloaded.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may confuse geo-replication (which requires manual failover) with auto-failover groups (which support automatic failover and readable secondaries), or they may overlook that transactional replication cannot meet the strict RPO requirement due to asynchronous nature and potential lag.
Detailed technical explanation
How to think about this question
Auto-failover groups for Azure SQL Managed Instance use the Availability Groups technology under the hood, with synchronous commit ensuring data is written to both the primary and secondary before the transaction is committed. The readable secondary allows read-only queries to be offloaded without affecting primary performance, and the failover group automatically handles endpoint redirection during failover. In practice, the RPO is typically less than 2 seconds with synchronous commit, and the read latency for reporting queries can be under 10 ms if the secondary is in the same region as the users.
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: Create an auto-failover group with the primary in West US and add a readable secondary in North Europe, using synchronous commit — Option C is correct because Azure SQL Managed Instance supports auto-failover groups with a readable secondary in a paired region. By configuring synchronous commit within the failover group, you achieve an RPO of less than 5 seconds (typically 0-2 seconds) while the secondary in North Europe can serve read-only traffic with low latency. The auto-failover group also provides automatic failover if the primary region becomes unavailable, meeting both the read scaling and disaster recovery requirements.
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.
Are there clue words in this question I should notice?
Yes — watch for: "primary". Asks for the main purpose or function, not a secondary benefit. Eliminate answers that describe side-effects or partial functions.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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