The answer is Azure SQL Database, as it is the most appropriate Azure data service for a financial application requiring strict consistency and ACID transaction support. Azure SQL Database is a fully managed relational database built on the SQL Server engine, which guarantees Atomicity, Consistency, Isolation, and Durability—ensuring that every transaction is processed reliably and that data integrity is maintained even during concurrent operations or system failures. On the DP-900 exam, this question tests your ability to match workload requirements to the correct Azure data service; a common trap is choosing Azure Cosmos DB for its high availability, but Cosmos DB offers tunable consistency levels rather than full ACID guarantees. Remember that any scenario demanding strict transactional integrity—like banking, inventory, or order processing—points directly to a relational service like Azure SQL Database. A helpful memory tip: think of the word “ACID” as a strict chemistry rule—only a relational database can hold that formula.
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 financial application requires strict consistency and transaction support (ACID). Which Azure data service is most appropriate for storing its core transactional data?
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
Azure SQL Database is a fully managed relational database service that provides full ACID (Atomicity, Consistency, Isolation, Durability) transaction support through its SQL Server engine. It is the correct choice for a financial application requiring strict consistency and transactional integrity, as it guarantees that all transactions are processed reliably and adhere to the ACID properties.
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 Cosmos DB
Why it's wrong here
Cosmos DB is a multi-model NoSQL database with configurable consistency but does not guarantee ACID across multiple documents.
✓
Azure SQL Database
Why this is correct
Azure SQL Database is a relational database engine that fully supports ACID properties for transactional workloads.
Related concept
Read the scenario before looking for a memorised answer.
✗
Azure Table Storage
Why it's wrong here
Table Storage is a NoSQL key-value store that uses eventual consistency by default, not suitable for ACID requirements.
✗
Azure Data Lake Storage
Why it's wrong here
Data Lake Storage is optimized for big data analytics and does not provide ACID transactional guarantees.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse Azure Cosmos DB's 'consistency levels' with full ACID transaction support, not realizing that Cosmos DB sacrifices strict transactional guarantees for global scalability and low latency.
Detailed technical explanation
How to think about this question
Under the hood, Azure SQL Database uses the same SQL Server engine as on-premises, implementing transaction logs and locking mechanisms (e.g., row-level locking, snapshot isolation) to enforce ACID properties. In a real-world financial scenario, this ensures that a funds transfer between accounts either fully completes or fully rolls back, preventing partial updates that could lead to data corruption. The service also supports T-SQL commands like BEGIN TRANSACTION, COMMIT, and ROLLBACK, giving developers fine-grained control over transactional boundaries.
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.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this DP-900 question in full detail.
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 — Azure SQL Database is a fully managed relational database service that provides full ACID (Atomicity, Consistency, Isolation, Durability) transaction support through its SQL Server engine. It is the correct choice for a financial application requiring strict consistency and transactional integrity, as it guarantees that all transactions are processed reliably and adhere to the ACID properties.
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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Question Discussion
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