Question 789 of 982

Identify considerations for relational data on Azure →easyMultiple ChoiceObjective-mapped

Quick Answer

The answer is Azure SQL Database elastic pool, the correct choice because it enables resource sharing and cost reduction by pooling eDTUs or eVCores across multiple databases with fluctuating usage patterns. When one database is idle, its unused capacity is automatically reallocated to heavily loaded databases, ensuring each gets resources when needed without over-provisioning. On the Microsoft Azure Data Fundamentals DP-900 exam, this scenario tests your understanding of how elastic pools solve the challenge of unpredictable, variable workloads across independent databases—a common trap is confusing elastic pools with single databases or managed instances, which lack this shared resource model. Remember the key phrase: “pool the idle, feed the peak.” For a quick memory tip, think of an elastic pool as a shared pizza: when one person isn’t hungry, their slices go to someone who’s starving, so nobody pays for a whole pizza they don’t finish.

DP-900 Practice Question: Identify considerations for relational data on Azure

This DP-900 practice question tests your understanding of identify considerations for relational data on azure. 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 company runs individual Azure SQL Databases for each of its departments. The databases experience varying usage patterns; sometimes one database is idle while another is heavily loaded. The company wants to pool resources to reduce cost while ensuring each database gets resources when needed. Which Azure feature should they use?

Question 1easymultiple choice

Read the full NAT/PAT explanation →

A
Azure SQL Database single database with provisioned DTUs
Why wrong: Single databases are isolated and each has its own fixed resource allocation. They cannot share resources with other databases, leading to potential over-provisioning and higher cost.
B
Azure SQL Database elastic pool
An elastic pool allows multiple databases to share a common pool of resources. This is cost-effective for databases with fluctuating usage, as idle databases free up resources for active ones.
C
Azure SQL Managed Instance
Why wrong: Azure SQL Managed Instance provides instance-scoped features like linked servers but does not support elastic pools. Each instance hosts databases, but they share the instance's fixed resources without the pooling flexibility of elastic pools.
D
SQL Server on Azure Virtual Machines
Why wrong: SQL Server on Azure VMs gives full control but requires manual management of high availability and resource allocation. It does not provide a built-in resource pooling feature like elastic pools.

Full breakdown with real-world context →

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 pools are designed to share resources (eDTUs or eVCores) across multiple databases with varying usage patterns. This allows idle databases to contribute their unused capacity to heavily loaded ones, reducing overall cost while ensuring each database gets resources when needed.

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 single database with provisioned DTUs
Why it's wrong here
Single databases are isolated and each has its own fixed resource allocation. They cannot share resources with other databases, leading to potential over-provisioning and higher cost.
✓
Azure SQL Database elastic pool
Why this is correct
An elastic pool allows multiple databases to share a common pool of resources. This is cost-effective for databases with fluctuating usage, as idle databases free up resources for active ones.
Related concept
Read the scenario before looking for a memorised answer.
✗
Azure SQL Managed Instance
Why it's wrong here
Azure SQL Managed Instance provides instance-scoped features like linked servers but does not support elastic pools. Each instance hosts databases, but they share the instance's fixed resources without the pooling flexibility of elastic pools.
✗
SQL Server on Azure Virtual Machines
Why it's wrong here
SQL Server on Azure VMs gives full control but requires manual management of high availability and resource allocation. It does not provide a built-in resource pooling feature like elastic pools.

Common exam traps

Common exam trap: answer the scenario, not the keyword

The trap here is that candidates might confuse elastic pools with single databases or managed instances, thinking that 'pooling' means using a single large instance rather than a shared resource model across multiple databases.

Detailed technical explanation

How to think about this question

Elastic pools use a shared resource model where the pool's total eDTUs or eVCores are allocated across all databases in the pool, with each database having a minimum and maximum resource guarantee. Under the hood, Azure SQL Database uses a resource governor to dynamically distribute CPU, memory, and I/O based on demand, ensuring no single database can starve others. In a real-world scenario, a pool of 10 databases with a total of 100 eDTUs can handle peak loads from 3 databases simultaneously while the other 7 are idle, reducing costs by up to 50% compared to individual databases.

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.

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FAQ

Questions learners often ask

What does this DP-900 question test?

Identify considerations for relational data on Azure — This question tests Identify considerations for relational data on Azure — 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 pools are designed to share resources (eDTUs or eVCores) across multiple databases with varying usage patterns. This allows idle databases to contribute their unused capacity to heavily loaded ones, reducing overall cost while ensuring each database gets resources when needed.

What should I do if I get this DP-900 question wrong?

Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.

What is the key concept behind this question?

Read the scenario before looking for a memorised answer.

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