The correct answer is that the RDS instances will become inaccessible and data will be lost. This happens because AWS KMS key deletion permanently destroys the customer master key (CMK) used for envelope encryption, meaning the encrypted data keys stored with the RDS volume can never be decrypted. Without the original CMK, Amazon RDS cannot read the master key to unlock the database, rendering the instance completely unrecoverable. On the AWS Certified Security Specialty SCS-C02 exam, this scenario tests your understanding of the irreversible nature of KMS key deletion and the difference between scheduled deletion and immediate deletion—a common trap is assuming you can re-encrypt with a new key or restore from a snapshot, but both require the original key. Memory tip: think of the CMK as the only key to a locked vault; if you destroy the key, the vault stays sealed forever.
SCS-C02 Data Protection Practice Question
This SCS-C02 practice question tests your understanding of data protection. 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 company uses AWS KMS to encrypt data in Amazon RDS. The security team discovers that a developer accidentally deleted a customer master key (CMK) used for RDS encryption. What is the impact on the RDS instances that were encrypted with that key?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The RDS instances will become inaccessible and data will be lost
Option C is correct because deleting a KMS key renders encrypted RDS instances unrecoverable. Option A is wrong because the data is permanently inaccessible. Option B is wrong because you cannot simply re-encrypt without the original key. Option D is wrong because the key deletion is not automatically reversible after the scheduled deletion period.
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 RDS instances will become inaccessible and data will be lost
Why this is correct
Without the key, the encrypted data cannot be decrypted.
Related concept
Read the scenario before looking for a memorised answer.
✗
The key deletion can be reversed within 30 days
Why it's wrong here
Key deletion has a waiting period but once deleted, it's permanent.
✗
The RDS instances will be automatically re-encrypted with a new key
Why it's wrong here
No automatic re-encryption occurs.
✗
The RDS instances will continue to operate normally
Why it's wrong here
Deleting the key makes data inaccessible.
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
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
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.
Use explanations to understand the rule behind the answer.
TExam Day Tips
→Underline the problem statement mentally.
→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 company's IT admin needs to give a contractor read-only access to production logs without sharing account credentials. Using role-based access control (RBAC) and temporary scoped permissions — not a permanent shared password — is the correct pattern. Questions like this test whether you can apply least-privilege access across cloud identity services.
What to study next
Got this wrong? Here's your next step.
Identify which SCS-C02 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Data Protection — This question tests Data Protection — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The RDS instances will become inaccessible and data will be lost — Option C is correct because deleting a KMS key renders encrypted RDS instances unrecoverable. Option A is wrong because the data is permanently inaccessible. Option B is wrong because you cannot simply re-encrypt without the original key. Option D is wrong because the key deletion is not automatically reversible after the scheduled deletion period.
What should I do if I get this SCS-C02 question wrong?
Identify which SCS-C02 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
This SCS-C02 practice question is part of Courseiva's free Amazon Web Services 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 SCS-C02 exam.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.