This FC0-U61 practice question tests your understanding of it concepts and terminology. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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 database administrator needs to ensure that a transaction either fully completes or is fully rolled back. Which database property guarantees this?
Isolation
Why wrong: Isolation ensures that concurrent transactions do not interfere with each other.
Durability
Why wrong: Durability ensures that once a transaction is committed, it remains so even after a system failure.
Atomicity
Atomicity ensures that each transaction is 'all or nothing'.
Consistency
Why wrong: Consistency ensures that a transaction brings the database from one valid state to another.
Answer choices
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 of its operations are committed successfully, or none are applied, and the database is rolled back to its previous state. This property directly guarantees the 'all or nothing' behavior required by the database administrator. In SQL databases, atomicity is typically enforced through transaction control statements like BEGIN TRANSACTION, COMMIT, and ROLLBACK, with the database engine managing undo logs to reverse partial changes if a failure occurs.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
Isolation
Why it's wrong here
Isolation ensures that concurrent transactions do not interfere with each other.
Durability
Why it's wrong here
Durability ensures that once a transaction is committed, it remains so even after a system failure.
Atomicity
Why this is correct
Atomicity ensures that each transaction is 'all or nothing'.
Related concept
Read the scenario before looking for a memorised answer.
Consistency
Why it's wrong here
Consistency ensures that a transaction brings the database from one valid state to another.
Common exam traps
The trap here is that candidates often confuse atomicity with consistency, mistakenly thinking that 'all or nothing' is about maintaining data rules, when in fact atomicity is the specific property that guarantees transactional indivisibility.
Detailed technical explanation
Under the hood, atomicity is implemented using a transaction log (often called a redo/undo log) where the database records every change before applying it. If a failure occurs mid-transaction, the database uses the undo log to revert any partial changes, ensuring no incomplete state persists. A real-world scenario is a bank transfer: atomicity ensures that if the debit succeeds but the credit fails, the entire transaction is rolled back, preventing the money from being lost or duplicated.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
A practitioner preparing for the FC0-U61 exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
What to study next
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FAQ
IT Concepts and Terminology — This question tests IT Concepts and Terminology — Read the scenario before looking for a memorised answer..
The correct answer is: Atomicity — Atomicity ensures that a transaction is treated as a single, indivisible unit of work: either all of its operations are committed successfully, or none are applied, and the database is rolled back to its previous state. This property directly guarantees the 'all or nothing' behavior required by the database administrator. In SQL databases, atomicity is typically enforced through transaction control statements like BEGIN TRANSACTION, COMMIT, and ROLLBACK, with the database engine managing undo logs to reverse partial changes if a failure occurs.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 25, 2026
This FC0-U61 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-U61 exam.
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