The correct answer is to implement retry logic in the application to reconnect to the new primary after failover. This works because active geo-replication does not provide a listener endpoint like failover groups do; instead, the application must handle connection failures by catching transient errors and retrying with a connection string that includes the secondary server as the failover partner. On the DP-300 exam, this scenario tests your understanding of the difference between active geo-replication and failover groups—a common trap is assuming a listener or Traffic Manager is required, but those add unnecessary complexity. The key insight is that the application itself must be resilient, using retry patterns to automatically reconnect when the primary becomes the secondary after a geo-replication failover. Memory tip: think “retry, not redirect”—the app retries the connection, it doesn’t rely on an external redirector.
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 that uses active geo-replication with a readable secondary in another region. You need to ensure that if a failover occurs, the application can automatically reconnect to the new primary with minimal code changes. What should you configure?
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
✓
Implement retry logic in the application to reconnect to the secondary server after failover.
Option D is correct because using a retry logic with a connection string that includes the failover partner (or using the ApplicationIntent=ReadWrite) and implementing retry logic allows the application to reconnect automatically. Option A is wrong because the listener endpoint is a feature of failover groups, not active geo-replication. Option B is wrong because Traffic Manager can be used but adds complexity. Option C is wrong because the application needs to handle failover; DNS change is not automatic.
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.
✗
Manually update the DNS record to point to the new primary after failover.
Why it's wrong here
Manual update violates automation goal.
✗
Configure a failover group listener endpoint and use that in the connection string.
Why it's wrong here
Failover group listener is not available with active geo-replication alone.
✗
Use Azure Traffic Manager with priority routing to the secondary server.
Why it's wrong here
Traffic Manager can be used but is not the simplest solution; also requires health probes.
✓
Implement retry logic in the application to reconnect to the secondary server after failover.
Why this is correct
Retry logic with appropriate connection string allows automatic reconnection.
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.
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.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this DP-300 question in full detail.
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.
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: Implement retry logic in the application to reconnect to the secondary server after failover. — Option D is correct because using a retry logic with a connection string that includes the failover partner (or using the ApplicationIntent=ReadWrite) and implementing retry logic allows the application to reconnect automatically. Option A is wrong because the listener endpoint is a feature of failover groups, not active geo-replication. Option B is wrong because Traffic Manager can be used but adds complexity. Option C is wrong because the application needs to handle failover; DNS change is not automatic.
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.
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