The correct configuration is multiple write regions enabled with automatic failover and session consistency. This achieves an RTO of under one second and an RPO of effectively zero within a region because the multi-master architecture allows any region to accept writes immediately during an outage, while automatic failover eliminates manual intervention delays and session consistency ensures your own writes are always readable. On the AZ-305 exam, this scenario tests your understanding of how Cosmos DB’s multi-region writes directly satisfy stringent SLA requirements for global, highly available applications—a common trap is choosing single-write regions with read replicas, which still require a manual or slower failover process, or selecting strong consistency, which sacrifices availability. Remember the memory tip: “Multi-write for zero RTO, session for zero RPO.”
AZ-305 Design infrastructure solutions Practice Question
This AZ-305 practice question tests your understanding of design infrastructure solutions. 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.
Your company is deploying a new application that uses Azure Cosmos DB for globally distributed low-latency reads and writes. The application must be highly available with a recovery point objective (RPO) of less than 5 seconds and recovery time objective (RTO) of less than 1 second in case of a regional outage. Which Cosmos DB configuration should you recommend?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Multiple write regions enabled with automatic failover and session consistency.
Option B is correct because enabling multiple write regions with automatic failover provides RTO < 1s and RPO = 0 within a region. Option A (single write region with read replicas) has RTO > 1s. Option C (strong consistency) limits availability. Option D (manual failover) increases RTO.
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.
✗
Multiple write regions with manual failover and eventual consistency.
Why it's wrong here
Manual failover increases RTO beyond 1s.
✗
Single write region with strong consistency and multi-region writes disabled.
Why it's wrong here
Strong consistency affects write performance and availability during failover.
✗
Single write region with multiple read regions and multi-region writes disabled.
Why it's wrong here
RTO requires manual or automatic failover, which takes minutes.
✓
Multiple write regions enabled with automatic failover and session consistency.
Why this is correct
Multi-region writes allow RTO < 1s and RPO = 0 for writes within the same region.
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 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 AZ-305 question in full detail.
Identify which AZ-305 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.
Design infrastructure solutions — This question tests Design infrastructure solutions — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Multiple write regions enabled with automatic failover and session consistency. — Option B is correct because enabling multiple write regions with automatic failover provides RTO < 1s and RPO = 0 within a region. Option A (single write region with read replicas) has RTO > 1s. Option C (strong consistency) limits availability. Option D (manual failover) increases RTO.
What should I do if I get this AZ-305 question wrong?
Identify which AZ-305 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.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
This AZ-305 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 AZ-305 exam.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.