DBS-C01 Deployment and Migration Practice Question
This DBS-C01 practice question tests your understanding of deployment and migration. 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.
Network Topology
Refer to the exhibit. A database specialist is taking a final snapshot of an RDS DB instance before deletion. The command returns the output shown. The snapshot is at 75% progress. What should the specialist do next?
Network Topology
A
Use the describe-db-snapshots command with --db-snapshot-identifier to get more details.
Why wrong: Already have details, just need to wait.
B
Use the stop-db-instance command to pause the snapshot.
Why wrong: There is no stop-db-instance for snapshots.
C
Wait for the snapshot status to become 'available' before deleting the instance.
Snapshot must be available before deletion to ensure completeness.
D
Delete the DB instance immediately; the snapshot will continue in the background.
Why wrong: Deleting the instance cancels the snapshot.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Wait for the snapshot status to become 'available' before deleting the instance.
Option C is correct because an RDS DB instance cannot be deleted while a final snapshot is in progress; the snapshot must reach the 'available' status first. The AWS CLI output shows the snapshot at 75% progress, meaning the snapshot is still being created. Attempting to delete the instance before the snapshot completes will result in an error, as the deletion operation requires the snapshot to be fully available.
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 the describe-db-snapshots command with --db-snapshot-identifier to get more details.
Why it's wrong here
Already have details, just need to wait.
✗
Use the stop-db-instance command to pause the snapshot.
Why it's wrong here
There is no stop-db-instance for snapshots.
✓
Wait for the snapshot status to become 'available' before deleting the instance.
Why this is correct
Snapshot must be available before deletion to ensure completeness.
Related concept
Read the scenario before looking for a memorised answer.
✗
Delete the DB instance immediately; the snapshot will continue in the background.
Why it's wrong here
Deleting the instance cancels the snapshot.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may assume the snapshot continues independently after instance deletion (Option D), but AWS RDS enforces that the instance cannot be deleted until the final snapshot is fully available, preventing data loss.
Detailed technical explanation
How to think about this question
When you initiate a final snapshot for an RDS DB instance, the snapshot is created as a point-in-time copy of the instance's storage volume using AWS's snapshot subsystem, which operates asynchronously. The snapshot status transitions from 'creating' to 'available' only after all data blocks are copied and the snapshot is fully consistent; during this time, the DB instance remains in a 'deleting' state if deletion was attempted, but the operation will be blocked until the snapshot completes. In real-world scenarios, large instances with high write activity can cause the snapshot to take significant time, and attempting to force-delete may require manual intervention via AWS support.
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: Wait for the snapshot status to become 'available' before deleting the instance. — Option C is correct because an RDS DB instance cannot be deleted while a final snapshot is in progress; the snapshot must reach the 'available' status first. The AWS CLI output shows the snapshot at 75% progress, meaning the snapshot is still being created. Attempting to delete the instance before the snapshot completes will result in an error, as the deletion operation requires the snapshot to be fully available.
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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