hardMultiple ChoiceObjective-mapped
FC0-U71 Practice Question: An e-commerce application experiences a data…
An e-commerce application experiences a data anomaly where an order is partially recorded: the order header is saved but some order line items are missing due to a system crash. Which property of database transactions is violated?
⚠ Common exam trap
It's easy for candidates to confuse 'consistency' (which relates to data integrity rules) with the all-or-nothing requirement of atomicity, especially when the partial data appears to violate business logic rather than the transaction boundary.
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
✓
Atomicity
Atomicity ensures that a transaction is treated as a single, indivisible unit of work: either all operations (e.g., saving the order header and all line items) complete successfully, or none are applied. In this scenario, the system crash caused a partial write, leaving the order header committed while line items were lost, which directly violates atomicity. The database should have rolled back the entire transaction upon crash recovery, preventing the partial state.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Consistency
Why it's wrong here
Consistency means data follows all rules; the partial data might still be consistent if nulls are allowed.
- ✗
Isolation
Why it's wrong here
Isolation prevents interference between transactions; a crash is not about concurrency.
- ✓
Atomicity
Why this is correct
Atomicity requires all operations in a transaction to complete or none; a partial commit breaks this.
- ✗
Durability
Why it's wrong here
Durability ensures committed data survives failures; the issue is that the transaction was only partially committed.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This FC0-U71 practice question is part of Courseiva's free CompTIA 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 FC0-U71 exam.