Question 1easymultiple choice
Full question →easymultiple choiceObjective-mapped
A financial company needs to store transactional records where each record has a fixed set of attributes (TransactionID, Amount, Date, AccountID). The data must support complex queries and enforce referential integrity. Which type of data store is most appropriate?
Answer choices
Why each option matters
Good practice is not just finding the correct option. The wrong answers often show the exact trap the exam wants you to fall into.
A
Distractor review
Key-value store
Key-value stores are optimized for simple lookups by a single key and do not support complex queries or referential integrity.
B
Distractor review
Document database
Document databases are flexible and schema-less, suitable for semi-structured data, but typically do not enforce referential integrity across collections.
C
Best answer
Relational database
Relational databases store data in tables with predefined schemas, support SQL for complex queries, and enforce referential integrity via foreign keys, making them ideal for transactional data.
D
Distractor review
Graph database
Graph databases excel at modeling relationships between entities, but they are not the best fit for simple transactional records that require strong consistency and complex SQL queries.
Common exam trap
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.
Technical deep dive
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.
Related practice questions
Related DP-900 practice-question pages
Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.
More questions from this exam
Keep practising from the same exam bank, or move into a focused topic page if this question exposed a weak area.
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Question 2
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Question 3
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Question 4
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Question 5
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Question 6
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FAQ
Questions learners often ask
What does this DP-900 question test?
Read the scenario before looking for a memorised answer.
What is the correct answer to this question?
The correct answer is: Relational database — Relational databases are designed for structured data with fixed schemas, support SQL queries, and enforce referential integrity through constraints like foreign keys. This matches the requirement of storing transactional records with a fixed schema and the need for complex queries and data integrity.
What should I do if I get this DP-900 question wrong?
Then try more questions from the same exam bank and focus on understanding why the wrong options are tempting.
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