- A
Azure SQL Database elastic pool
Elastic pools allow databases to share resources from a common pool, reducing cost for databases with low average usage and high, unpredictable spikes. They also simplify adding new databases.
- B
Azure SQL Database single database with reserved capacity
Why wrong: Single databases are isolated and may be underutilized, leading to higher costs. Reserved capacity reduces cost but does not pool resources across databases.
- C
Azure SQL Managed Instance
Why wrong: SQL Managed Instance is intended for lift-and-shift migrations of large databases and includes more overhead and cost. It is not optimized for pooling many small databases.
- D
SQL Server on Azure Virtual Machines
Why wrong: SQL Server on VMs requires manual management of resources and is more expensive and complex for many small databases compared to an elastic pool.
Quick Answer
The answer is Azure SQL Database elastic pool, which is the correct choice because it enables resource pooling across multiple databases with low average usage and unpredictable spikes, allowing each database to burst up to a configurable per-database limit (such as max eDTU or max vCores) while sharing a fixed pool of resources, thereby minimizing cost and eliminating the need for manual sizing when adding new databases. On the Microsoft Azure Solutions Architect Expert AZ-305 exam, this scenario tests your understanding of how elastic pools optimize for variable, spiky workloads across many small databases, often appearing as a contrast to single databases or managed instances—a common trap is choosing a single database with auto-scaling, which would not pool resources across clients. Remember the memory tip: “Pool for spiky, small DBs; single for steady, large ones.”
AZ-305 Design data storage solutions Practice Question
This AZ-305 practice question tests your understanding of design data storage solutions. 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.
A software company hosts multiple small databases for different clients on Azure SQL Database. Each database has low average usage but experiences unpredictable spikes. The company wants to minimize cost by pooling resources across databases while allowing each database to consume resources up to a set limit during spikes. They also need the ability to easily add new databases without manual sizing. Which Azure SQL Database deployment option should they choose?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue:
"minimum / minimize"Why it matters: Asks for the least resource use — fewest addresses, smallest subnet, lowest overhead. Eliminate over-provisioned options even if they would technically work.
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
Azure SQL Database elastic pool
Azure SQL Database elastic pool is the correct choice because it allows multiple databases to share a fixed pool of resources (eDTUs or vCores), which minimizes cost by pooling resources across databases with low average usage and unpredictable spikes. Each database can automatically burst up to a configurable per-database resource limit (e.g., max eDTU per database) during spikes, and new databases can be added to the pool without manual sizing, as they simply consume from the shared pool.
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.
- ✓
Azure SQL Database elastic pool
Why this is correct
Elastic pools allow databases to share resources from a common pool, reducing cost for databases with low average usage and high, unpredictable spikes. They also simplify adding new databases.
Clue confirmation
The clue word "minimum / minimize" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Azure SQL Database single database with reserved capacity
Why it's wrong here
Single databases are isolated and may be underutilized, leading to higher costs. Reserved capacity reduces cost but does not pool resources across databases.
- ✗
Azure SQL Managed Instance
Why it's wrong here
SQL Managed Instance is intended for lift-and-shift migrations of large databases and includes more overhead and cost. It is not optimized for pooling many small databases.
- ✗
SQL Server on Azure Virtual Machines
Why it's wrong here
SQL Server on VMs requires manual management of resources and is more expensive and complex for many small databases compared to an elastic pool.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may choose single database with reserved capacity (Option B) thinking it offers cost savings, but they overlook that reserved capacity applies to a single database and does not provide resource pooling or automatic bursting across multiple databases, making it more expensive for the described workload.
Detailed technical explanation
How to think about this question
Under the hood, elastic pools use a shared resource model where the pool's total eDTU or vCore limit is allocated across all databases, with each database having a configurable min and max resource limit (e.g., min eDTU per database ensures baseline performance, max eDTU per database allows bursting). A subtle behavior is that if the pool's total resource usage exceeds the pool limit, all databases experience throttling, so proper pool sizing based on aggregate DTU consumption is critical. In a real-world scenario, a SaaS provider hosting hundreds of customer databases with sporadic usage can use elastic pools to achieve up to 80% cost savings compared to single databases, while still meeting spike demands.
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 startup's cloud architect reviews their monthly bill and notices costs are higher than expected for a long-running batch job. Switching from on-demand instances to Reserved Instances — or using Spot/Preemptible VMs — can reduce compute costs by up to 72 %. Questions like this test whether you understand the tradeoffs between commitment, flexibility, and cost across cloud pricing models.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
- →
Design data storage solutions — study guide chapter
Learn the concepts, then practise the questions
- →
Design data storage solutions practice questions
Targeted practice on this topic area only
- →
All AZ-305 questions
999 questions across all exam domains
- →
Microsoft Azure Solutions Architect Expert AZ-305 study guide
Full concept coverage aligned to exam objectives
- →
AZ-305 practice test guide
How to use practice tests most effectively before exam day
Related practice questions
Related AZ-305 practice-question pages
Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.
Design identity, governance, and monitoring solutions practice questions
Practise AZ-305 questions linked to Design identity, governance, and monitoring solutions.
Design data storage solutions practice questions
Practise AZ-305 questions linked to Design data storage solutions.
Design business continuity solutions practice questions
Practise AZ-305 questions linked to Design business continuity solutions.
Design infrastructure solutions practice questions
Practise AZ-305 questions linked to Design infrastructure solutions.
SAA-C03 VPC practice questions
Practise AZ-305 questions linked to SAA-C03 VPC.
SAA-C03 S3 lifecycle policy questions
Practise AZ-305 questions linked to SAA-C03 S3 lifecycle policy questions.
SAA-C03 RDS Multi-AZ questions
Practise AZ-305 questions linked to SAA-C03 RDS Multi-AZ questions.
SAA-C03 IAM policy practice questions
Practise AZ-305 questions linked to SAA-C03 IAM policy.
SAA-C03 Route 53 failover questions
Practise AZ-305 questions linked to SAA-C03 Route 53 failover questions.
SAA-C03 CloudFront practice questions
Practise AZ-305 questions linked to SAA-C03 CloudFront.
SAA-C03 NAT gateway questions
Practise AZ-305 questions linked to SAA-C03 NAT gateway questions.
SAA-C03 VPC endpoint questions
Practise AZ-305 questions linked to SAA-C03 VPC endpoint questions.
Practice this exam
Start a free AZ-305 practice session
Short sessions build daily habit. Longer sessions build exam-day stamina. Try a timed session to simulate real conditions.
FAQ
Questions learners often ask
What does this AZ-305 question test?
Design data storage solutions — This question tests Design data storage solutions — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Azure SQL Database elastic pool — Azure SQL Database elastic pool is the correct choice because it allows multiple databases to share a fixed pool of resources (eDTUs or vCores), which minimizes cost by pooling resources across databases with low average usage and unpredictable spikes. Each database can automatically burst up to a configurable per-database resource limit (e.g., max eDTU per database) during spikes, and new databases can be added to the pool without manual sizing, as they simply consume from the shared pool.
What should I do if I get this AZ-305 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: "minimum / minimize". Asks for the least resource use — fewest addresses, smallest subnet, lowest overhead. Eliminate over-provisioned options even if they would technically work.
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 →
Last reviewed: Jun 11, 2026
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.