- A
READ UNCOMMITTED
Why wrong: READ UNCOMMITTED allows dirty reads, which can lead to data inconsistency issues.
- B
READ COMMITTED
READ COMMITTED reduces the number of locks held, thereby decreasing the likelihood of deadlocks while still preventing dirty reads.
- C
SNAPSHOT ISOLATION
Why wrong: SNAPSHOT ISOLATION is not a valid isolation level for Amazon Aurora MySQL; it is specific to Microsoft SQL Server.
- D
SERIALIZABLE
Why wrong: SERIALIZABLE increases locking and can actually increase the occurrence of deadlocks.
Question 99 of 1,730
DBS-C01 READ COMMITTED Practice Question
This DBS-C01 practice question tests your understanding of management and operations. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. A key principle to apply: rEAD COMMITTED. 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 company is using Amazon Aurora MySQL-Compatible Edition. The database has frequent deadlocks, and the application team suspects that the isolation level is causing the issue. The current isolation level is REPEATABLE READ. The team wants to reduce deadlocks while maintaining data consistency. Which isolation level should be recommended?
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
✓
READ COMMITTED
Option B (READ COMMITTED) is correct because it reduces locking compared to REPEATABLE READ, which helps minimize deadlocks in high-concurrency environments. In READ COMMITTED, MySQL uses row-level locks only for the duration of the statement, not the entire transaction, reducing the chance of deadlocks. It still provides consistent reads at the statement level, avoiding dirty reads. Option A (READ UNCOMMITTED) is wrong because it allows dirty reads and is not suitable for transactional consistency. Option C (SNAPSHOT ISOLATION) is wrong because it is not supported by MySQL; it is a SQL Server feature. Option D (SERIALIZABLE) is wrong because it increases locking, leading to more deadlocks.
Key principle: READ COMMITTED
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
READ UNCOMMITTED
Why it's wrong here
READ UNCOMMITTED allows dirty reads, which can lead to data inconsistency issues.
- ✓
READ COMMITTED
Why this is correct
READ COMMITTED reduces the number of locks held, thereby decreasing the likelihood of deadlocks while still preventing dirty reads.
Related concept
READ COMMITTED
- ✗
SNAPSHOT ISOLATION
Why it's wrong here
SNAPSHOT ISOLATION is not a valid isolation level for Amazon Aurora MySQL; it is specific to Microsoft SQL Server.
- ✗
SERIALIZABLE
Why it's wrong here
SERIALIZABLE increases locking and can actually increase the occurrence of deadlocks.
Common exam traps
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.
Detailed technical explanation
How to think about this question
Treat this as a scenario question. Identify the problem, the constraint, and the best action. Then compare each option against those facts.
KKey Concepts to Remember
- READ COMMITTED
- Deadlock
- Isolation Level
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
READ COMMITTED
Real-world example
How this comes up in practice
A cloud solutions architect for a retail company is evaluating services for a new workload. The correct answer here reflects best practice for the specific scenario described — not a general cloud recommendation. READ COMMITTED Cloud exam questions reward reading the constraint carefully: the same technology can be right or wrong depending on the use case.
What to study next
Got this wrong? Here's your next step.
Review rEAD COMMITTED, then practise related DBS-C01 questions on the same topic to reinforce the concept.
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Management and Operations — study guide chapter
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Management and Operations practice questions
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FAQ
Questions learners often ask
What does this DBS-C01 question test?
Management and Operations — This question tests Management and Operations — READ COMMITTED.
What is the correct answer to this question?
The correct answer is: READ COMMITTED — Option B (READ COMMITTED) is correct because it reduces locking compared to REPEATABLE READ, which helps minimize deadlocks in high-concurrency environments. In READ COMMITTED, MySQL uses row-level locks only for the duration of the statement, not the entire transaction, reducing the chance of deadlocks. It still provides consistent reads at the statement level, avoiding dirty reads. Option A (READ UNCOMMITTED) is wrong because it allows dirty reads and is not suitable for transactional consistency. Option C (SNAPSHOT ISOLATION) is wrong because it is not supported by MySQL; it is a SQL Server feature. Option D (SERIALIZABLE) is wrong because it increases locking, leading to more deadlocks.
What should I do if I get this DBS-C01 question wrong?
Review rEAD COMMITTED, then practise related DBS-C01 questions on the same topic to reinforce the concept.
What is the key concept behind this question?
READ COMMITTED
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Last reviewed: Jun 20, 2026
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