DBS-C01 Deployment and Migration Practice Question
This DBS-C01 practice question tests your understanding of deployment and migration. Examine the command output carefully: the correct answer depends on what the output actually shows, not on general recall alone. 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.
Network Topology
An administrator runs the CLI command shown in the exhibit and sees the output. The DB instance 'mydb' is currently running MySQL 5.7.22. What does the output indicate?
Network Topology
A
The master user password has been changed
Why wrong: The password is shown as pending, but the question is about the version.
B
The DB instance has failed to apply modifications
Why wrong: PendingModifiedValues indicates pending changes, not failure.
C
The DB instance is using a custom DB parameter group
Why wrong: The parameter group is default.mysql5.7, not custom.
D
The DB instance has a pending minor version upgrade to 5.7.23
The EngineVersion in PendingModifiedValues indicates a pending upgrade.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The DB instance has a pending minor version upgrade to 5.7.23
The output shows 'Pending maintenance: Yes' with 'Minor version upgrade to 5.7.23' listed. This indicates that the DB instance has a pending minor version upgrade that will be applied during the next maintenance window. The CLI command 'aws rds describe-db-instances --db-instance-identifier mydb' returns this information when a minor version upgrade is scheduled but not yet applied.
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.
✗
The master user password has been changed
Why it's wrong here
The password is shown as pending, but the question is about the version.
✗
The DB instance has failed to apply modifications
Why it's wrong here
PendingModifiedValues indicates pending changes, not failure.
✗
The DB instance is using a custom DB parameter group
Why it's wrong here
The parameter group is default.mysql5.7, not custom.
✓
The DB instance has a pending minor version upgrade to 5.7.23
Why this is correct
The EngineVersion in PendingModifiedValues indicates a pending upgrade.
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 confuse 'Pending maintenance' with a failed modification or a password change, but RDS clearly separates pending maintenance actions (like version upgrades) from immediate modifications (like password changes) in the CLI output.
Trap categories for this question
Command / output trap
The password is shown as pending, but the question is about the version.
Detailed technical explanation
How to think about this question
RDS uses maintenance windows to apply minor version upgrades and OS patches with minimal disruption. The 'PendingModifiedValues' field in the describe-db-instances output shows changes that have been requested but not yet applied, such as a 'DBEngineVersion' change. In MySQL 5.7, minor version upgrades (e.g., 5.7.22 to 5.7.23) are typically applied automatically during the maintenance window unless auto-minor-version-upgrade is disabled, and they include bug fixes and security patches without breaking compatibility.
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 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. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. 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.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Deployment and Migration — This question tests Deployment and Migration — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The DB instance has a pending minor version upgrade to 5.7.23 — The output shows 'Pending maintenance: Yes' with 'Minor version upgrade to 5.7.23' listed. This indicates that the DB instance has a pending minor version upgrade that will be applied during the next maintenance window. The CLI command 'aws rds describe-db-instances --db-instance-identifier mydb' returns this information when a minor version upgrade is scheduled but not yet applied.
What should I do if I get this DBS-C01 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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Question Discussion
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