- A
Elastic pool
Why wrong: Elastic pool is a shared resource model where databases share CPU, memory, and IO within the pool, providing the least isolation.
- B
Hyperscale
Why wrong: Hyperscale is a scalable architecture but still operates within the shared model of Azure SQL Database, not providing dedicated resources per database.
- C
Managed Instance
Correct. Managed Instance offers dedicated compute, storage, and network isolation, providing the highest level of resource isolation.
- D
Single database
Why wrong: Single database provides isolation at the database level but shares underlying server resources and lacks dedicated network isolation, making it less isolated than Managed Instance.
Question 426 of 963
DP-300 Plan and implement data platform resources Practice Question
This DP-300 practice question tests your understanding of plan and implement data platform resources. 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.
You are designing a new Azure SQL Database for an e-commerce application. The database will contain sensitive customer data and must be isolated from other tenants. Which deployment option provides the highest level of resource isolation?
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
✓
Managed Instance
Azure SQL Managed Instance provides the highest level of resource isolation among the listed options. It runs as an isolated instance with its own dedicated set of CPU, memory, and storage resources, and it is deployed into a dedicated virtual network, ensuring network isolation as well. This makes it ideal for scenarios requiring strict tenant separation, such as an e-commerce application handling sensitive customer data. In contrast, a single database in Azure SQL Database shares some underlying resources at the logical server level and does not offer the same degree of network isolation.
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.
- ✗
Elastic pool
Why it's wrong here
Elastic pool is a shared resource model where databases share CPU, memory, and IO within the pool, providing the least isolation.
- ✗
Hyperscale
Why it's wrong here
Hyperscale is a scalable architecture but still operates within the shared model of Azure SQL Database, not providing dedicated resources per database.
- ✓
Managed Instance
Why this is correct
Correct. Managed Instance offers dedicated compute, storage, and network isolation, providing the highest level of resource isolation.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Single database
Why it's wrong here
Single database provides isolation at the database level but shares underlying server resources and lacks dedicated network isolation, making it less isolated than Managed Instance.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The key trap is that candidates may assume a single database offers the highest isolation because it is not part of a pool, but they overlook that Managed Instance provides dedicated compute, memory, and network isolation with its own virtual network, making it more suitable for strict tenant isolation requirements.
Detailed technical explanation
How to think about this question
Under the hood, a single database in the Premium or Business Critical service tier uses a reserved set of replicas (primary and secondary) with dedicated compute and storage, ensuring predictable performance and full isolation. In contrast, Hyperscale separates compute from storage and uses a shared page server layer, which can introduce latency variability under heavy load. A real-world scenario where this matters is a multi-tenant SaaS application where each tenant's database must meet strict SLAs and compliance requirements, making a single database the safest choice.
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 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.
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-300 question test?
Plan and implement data platform resources — This question tests Plan and implement data platform resources — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Managed Instance — Azure SQL Managed Instance provides the highest level of resource isolation among the listed options. It runs as an isolated instance with its own dedicated set of CPU, memory, and storage resources, and it is deployed into a dedicated virtual network, ensuring network isolation as well. This makes it ideal for scenarios requiring strict tenant separation, such as an e-commerce application handling sensitive customer data. In contrast, a single database in Azure SQL Database shares some underlying resources at the logical server level and does not offer the same degree of network isolation.
What should I do if I get this DP-300 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.
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 →
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Last reviewed: Jun 24, 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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