- A
Use the 'az sql db failover-group re-sync' command to re-synchronize
Why wrong: There is no such command; you must remove and recreate the secondary.
- B
Configure replication from the new primary to the old primary using active geo-replication
Why wrong: Active geo-replication is separate from failover groups; mixing both is not supported.
- C
Restore the original primary from backup and re-add it to the failover group
Why wrong: Restoring from backup will lose transactions that occurred after the failover, unless point-in-time is used, but it's not the standard procedure.
- D
Remove the original primary from the failover group, drop the database, and recreate it as a new secondary
This is the recommended approach to rejoin a failed primary after a forced failover.
Quick Answer
The correct answer is to remove the original primary from the failover group, drop the database, and recreate it as a new secondary. This is necessary because after a forced failover, the original primary is left in an unsynchronizable, broken state—it cannot simply rejoin the failover group or resume replication without being fully reseeded from the current primary. The only way to bring it back without data loss is to treat it as a fresh secondary, which forces a complete copy of all data from the new primary. On the DP-300 exam, this scenario tests your understanding of disaster recovery mechanics and the limitations of geo-replication after an outage. A common trap is assuming you can re-sync or restore a backup without losing recent transactions, but both options introduce data loss or are technically invalid. Remember the mnemonic: “Drop and re-seed, no data bleed”—if the primary is dead, you must remove, drop, and add it fresh to preserve every committed row.
DP-300 Practice Question: Plan and configure a high availability and disaster recovery environment
This DP-300 practice question tests your understanding of plan and configure a high availability and disaster recovery environment. 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 have an Azure SQL Database configured with a failover group that includes a secondary in another region. The primary region experiences a complete outage. You initiate a forced failover. After the outage is resolved, you want to bring the original primary back as a secondary without data loss. What should you do?
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 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
Remove the original primary from the failover group, drop the database, and recreate it as a new secondary
Option C is correct. After a forced failover, the original primary becomes unavailable. To rejoin it without data loss, you must remove the failed primary from the failover group, drop it, and then add a new secondary database (which will be seeded from the current primary). Restoring from backup (A) will cause data loss. Re-synchronizing (B) is not possible as the original primary is in a broken state. Forcing replication (D) is not a valid operation.
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.
- ✗
Use the 'az sql db failover-group re-sync' command to re-synchronize
Why it's wrong here
There is no such command; you must remove and recreate the secondary.
- ✗
Configure replication from the new primary to the old primary using active geo-replication
Why it's wrong here
Active geo-replication is separate from failover groups; mixing both is not supported.
- ✗
Restore the original primary from backup and re-add it to the failover group
Why it's wrong here
Restoring from backup will lose transactions that occurred after the failover, unless point-in-time is used, but it's not the standard procedure.
- ✓
Remove the original primary from the failover group, drop the database, and recreate it as a new secondary
Why this is correct
This is the recommended approach to rejoin a failed primary after a forced failover.
Clue confirmation
The clue word "primary" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Trap categories for this question
Command / output trap
There is no such command; you must remove and recreate the secondary.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
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.
- Use explanations to understand the rule behind the answer.
TExam Day Tips
- Underline the problem statement mentally.
- 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 cloud solutions architect for a retail company is evaluating services for a new workload. The correct answer here reflects best practice for the specific scenario described — not a general cloud recommendation. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Cloud exam questions reward reading the constraint carefully: the same technology can be right or wrong depending on the use case.
What to study next
Got this wrong? Here's your next step.
Identify which DP-300 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
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Plan and configure a high availability and disaster recovery environment — study guide chapter
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FAQ
Questions learners often ask
What does this DP-300 question test?
Plan and configure a high availability and disaster recovery environment — This question tests Plan and configure a high availability and disaster recovery environment — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Remove the original primary from the failover group, drop the database, and recreate it as a new secondary — Option C is correct. After a forced failover, the original primary becomes unavailable. To rejoin it without data loss, you must remove the failed primary from the failover group, drop it, and then add a new secondary database (which will be seeded from the current primary). Restoring from backup (A) will cause data loss. Re-synchronizing (B) is not possible as the original primary is in a broken state. Forcing replication (D) is not a valid operation.
What should I do if I get this DP-300 question wrong?
Identify which DP-300 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
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.
About these practice questions
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Last reviewed: Jun 21, 2026
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.
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