Question 1mediummultiple choice
Full question →mediummultiple choiceObjective-mapped
A banking application processes fund transfers. When a transfer is executed, the system must either successfully debit one account and credit the other, or if any step fails, the entire operation must be rolled back so no partial changes remain. Which ACID property directly enforces this behavior?
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
Best answer
A) Atomicity
Atomicity ensures the entire transaction is completed or fully rolled back, preventing partial updates.
B
Distractor review
B) Consistency
Consistency ensures data integrity constraints are maintained, but it does not guarantee that multiple steps succeed or fail together.
C
Distractor review
C) Isolation
Isolation controls visibility of intermediate states to other transactions, not the all-or-nothing outcome.
D
Distractor review
D) Durability
Durability guarantees that committed changes survive failures, but it does not enforce the rollback of partial transactions.
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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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: A) Atomicity — Atomicity guarantees that a transaction is treated as a single, indivisible unit of work. Either all operations within the transaction complete successfully, or none are applied. Consistency ensures data remains valid, Isolation prevents concurrent transactions from interfering, and Durability ensures committed changes persist. Atomicity is the property that ensures the all-or-nothing behavior described.
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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