- A
Use a stored procedure that updates all products in one statement without error handling
Why wrong: Without error handling, a failure could still leave partial updates; a stored procedure alone does not guarantee atomicity without transaction control.
- B
Increase the frequency of the script to run every hour with smaller batches
Why wrong: Running more frequently does not solve the partial update problem; it may increase contention.
- C
Remove the transaction and use individual UPDATE statements with error logging
Why wrong: Without a transaction, partial updates can still occur, leading to inconsistency.
- D
Wrap all UPDATE statements in a single transaction with READ COMMITTED isolation level and add error handling to roll back on failure
This ensures atomicity (all or nothing) and prevents interference from other transactions.
Quick Answer
The correct action is to wrap all UPDATE statements in a single transaction with READ COMMITTED isolation level and add error handling to roll back on failure. This ensures atomicity, meaning the entire batch of updates either commits together or rolls back entirely, which directly addresses the need for transactions to maintain database consistency by preventing partial updates. On the CompTIA ITF+ FC0-U61 exam, this scenario tests your understanding of ACID properties—specifically atomicity and isolation—and how they apply to real-world database scripts. A common trap is thinking that simply grouping statements in a loop is enough, but without a transaction wrapper, a mid-script failure leaves the database in an inconsistent state. Remember the mnemonic “A-R-I” for Atomicity, Rollback, Isolation: if you can’t commit All, Roll back Immediately to keep data clean.
FC0-U61 Database Fundamentals Practice Question
This FC0-U61 practice question tests your understanding of database fundamentals. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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 small business uses a MySQL database to manage inventory and sales. The database has two tables: Products (ProductID, ProductName, QuantityInStock) and Sales (SaleID, ProductID, QuantitySold, SaleDate). The business runs a nightly script that updates QuantityInStock by subtracting QuantitySold from the Products table based on the day's sales. Recently, the inventory levels have become inaccurate. For example, a product shows negative stock even though no sales occurred that day. The database administrator suspects the issue is related to how transactions are handled. The nightly script runs multiple UPDATE statements in a loop. If the script fails partway through, some products' stock is updated while others are not, leaving inconsistent data. The administrator wants to ensure that either all updates succeed or none do, and that the script does not interfere with daytime operations. Which action should the administrator take?
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
Wrap all UPDATE statements in a single transaction with READ COMMITTED isolation level and add error handling to roll back on failure
Option D is correct because wrapping all UPDATE statements in a single transaction with READ COMMITTED isolation level ensures atomicity: either all updates commit or none do, preventing partial updates. Adding error handling with a rollback on failure guarantees that if the script fails partway through, the entire transaction is undone, leaving the database consistent. READ COMMITTED isolation prevents dirty reads and minimizes locking, reducing interference with daytime operations.
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.
- ✗
Use a stored procedure that updates all products in one statement without error handling
Why it's wrong here
Without error handling, a failure could still leave partial updates; a stored procedure alone does not guarantee atomicity without transaction control.
- ✗
Increase the frequency of the script to run every hour with smaller batches
Why it's wrong here
Running more frequently does not solve the partial update problem; it may increase contention.
- ✗
Remove the transaction and use individual UPDATE statements with error logging
Why it's wrong here
Without a transaction, partial updates can still occur, leading to inconsistency.
- ✓
Wrap all UPDATE statements in a single transaction with READ COMMITTED isolation level and add error handling to roll back on failure
Why this is correct
This ensures atomicity (all or nothing) and prevents interference from other transactions.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may think error logging (Option C) or batching (Option B) is sufficient to maintain consistency, but they overlook that without a transaction with rollback, partial updates are still committed and cannot be undone.
Detailed technical explanation
How to think about this question
In MySQL, transactions use the InnoDB storage engine's MVCC (Multi-Version Concurrency Control) to provide ACID compliance. READ COMMITTED isolation level ensures that each statement sees only committed data, reducing locking overhead compared to REPEATABLE READ, which is important for minimizing interference with daytime read/write operations. The ROLLBACK command in error handling undoes all changes made since the transaction's start, leveraging the undo log to restore the previous state, which is critical for batch update scripts that must maintain data integrity.
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 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
Got this wrong? Here's your next step.
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FAQ
Questions learners often ask
What does this FC0-U61 question test?
Database Fundamentals — This question tests Database Fundamentals — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Wrap all UPDATE statements in a single transaction with READ COMMITTED isolation level and add error handling to roll back on failure — Option D is correct because wrapping all UPDATE statements in a single transaction with READ COMMITTED isolation level ensures atomicity: either all updates commit or none do, preventing partial updates. Adding error handling with a rollback on failure guarantees that if the script fails partway through, the entire transaction is undone, leaving the database consistent. READ COMMITTED isolation prevents dirty reads and minimizes locking, reducing interference with daytime operations.
What should I do if I get this FC0-U61 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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Last reviewed: Jun 11, 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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