The answer is that the policy fails to grant any DynamoDB read actions, such as GetItem, Query, or Scan, which are essential for the application to read items from the table. While the policy correctly allows PutItem and DeleteItem, it omits the read permissions required by the use case, and although CreateDBSnapshot is permitted on a wildcard resource, the missing read capability is the critical flaw. On the AWS Certified Database Specialty DBS-C01 exam, this scenario tests your ability to map IAM policy evaluation for database services to specific API actions, often trapping candidates who focus on resource-level restrictions (like the RDS snapshot ARN) rather than verifying that all required actions are present. A common memory tip is to always check the verb: if the application needs to read, confirm that the policy includes a read action like GetItem or Scan before worrying about resource ARNs.
DBS-C01 Management and Operations 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. 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.
Refer to the exhibit. An IAM policy is attached to a role used by an application running on Amazon EC2. The application needs to read items from a DynamoDB table named 'MyTable' and create manual snapshots of an RDS instance. What is the issue with the policy?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The policy does not grant any DynamoDB read actions (e.g., GetItem, Query, Scan) required for the application.
Option B is correct because the policy grants only 'PutItem' and 'DeleteItem' actions on the DynamoDB table, but the application needs to read items (e.g., 'GetItem' or 'Scan'). Additionally, 'CreateDBSnapshot' requires specifying the DB instance ARN, not just '*', but the primary issue is the missing read permissions. Option A is wrong because 'DescribeDBInstances' with '*' is allowed but not the main issue. Option C is wrong because the policy is structured correctly. Option D is wrong because 'CreateDBSnapshot' is allowed on '*', but the missing read action is the critical flaw.
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 policy does not grant any DynamoDB read actions (e.g., GetItem, Query, Scan) required for the application.
Why this is correct
The application needs to read items, but the policy only allows PutItem and DeleteItem.
Related concept
Read the scenario before looking for a memorised answer.
✗
The policy allows 'DescribeDBInstances' on all resources, which is too permissive.
Why it's wrong here
While it is broad, the immediate issue is missing DynamoDB read permissions.
✗
The policy uses 'Resource': '*' for DynamoDB, which should be the table ARN.
Why it's wrong here
The DynamoDB resource is correctly scoped to the table ARN.
✗
The policy grants 'CreateDBSnapshot' on all resources, which is insufficient; it should be scoped to the specific DB instance.
Why it's wrong here
Scoping is a best practice but not the primary issue; the missing read permission is more critical.
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 DBS-C01 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.
Management and Operations — This question tests Management and Operations — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The policy does not grant any DynamoDB read actions (e.g., GetItem, Query, Scan) required for the application. — Option B is correct because the policy grants only 'PutItem' and 'DeleteItem' actions on the DynamoDB table, but the application needs to read items (e.g., 'GetItem' or 'Scan'). Additionally, 'CreateDBSnapshot' requires specifying the DB instance ARN, not just '*', but the primary issue is the missing read permissions. Option A is wrong because 'DescribeDBInstances' with '*' is allowed but not the main issue. Option C is wrong because the policy is structured correctly. Option D is wrong because 'CreateDBSnapshot' is allowed on '*', but the missing read action is the critical flaw.
What should I do if I get this DBS-C01 question wrong?
Identify which DBS-C01 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
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These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. Refer to the exhibit. An application on an EC2 instance is trying to read an object from the S3 bucket 'data-lake-prod'. The instance is in a VPC with an IP address of 10.0.1.5. The application receives an Access Denied error. What is the cause?
hard
A.An SCP is denying S3 access to the account.
✓ B.A Deny statement with a source IP condition is blocking access.
C.The S3 bucket policy requires a specific VPC endpoint.
D.The IAM role does not have permission to read from the bucket.
Why B: Option B is correct. The Deny statement applies to the source IP 10.0.1.5 (within 10.0.0.0/8), overriding the Allow. Option A is wrong because the IAM role does allow s3:GetObject on the bucket. Option C is wrong because there is no explicit condition on the Allow statement. Option D is wrong because the policy is attached to the role, not an SCP.
Variation 2. Refer to the exhibit. A database engineer is assigned this IAM policy. Which of the following actions can the engineer perform? (Choose two.)
hard
✓ A.Describe all automated snapshots
B.Delete a manual snapshot named dev-snapshot
C.Delete a manual snapshot named prod-database-snapshot
D.Delete a manual snapshot named prod-backup
✓ E.Create a manual snapshot named test-snapshot
Why A: Correct answers are B and D. B: The policy allows 'rds:DescribeDBSnapshots' for all resources. D: The policy allows 'rds:CreateDBSnapshot' for all resources, so creating a snapshot with any name is allowed. A is wrong because the Deny statement blocks deletion of snapshots with names starting with 'prod-'. C is wrong because the Deny specifically targets the 'prod-*' pattern. E is wrong because the Deny applies to snapshots in us-east-1 only? Actually the Deny resource is specific to us-east-1, but the question says 'in any region' - the policy's Deny applies only to us-east-1, so deletion in other regions is allowed? Wait, the resource ARN specifies us-east-1, so Deny only applies to snapshots in that region. But the question says 'prod-database-snapshot' - if it's in us-east-1, it's denied. However, the user is asking about 'a snapshot named prod-database-snapshot' - that matches the pattern. So C is wrong. E is wrong because the policy does not allow deletion of snapshots with prefix 'prod-'. The correct interpretation: The Deny only applies to the specific ARN with region us-east-1, so if the snapshot is in another region, deletion is allowed? But the policy does not explicitly allow deletion, so by default it's denied (unless there is an Allow). The policy only allows Create and Describe. Deletion is not allowed anywhere because there is no Allow statement for Delete. So deletion is implicitly denied for all snapshots. Wait, IAM default is deny. So without an explicit Allow for Delete, deletion is denied. So E is wrong. The correct answers are B and D.
Variation 3. The exhibit shows an IAM policy attached to a user. The user needs to create a manual snapshot of an RDS DB instance named 'production-db'. Which action will the user be able to perform?
hard
A.Create a manual snapshot of 'production-db' with the name 'production-db-snapshot'.
✓ B.Create a manual snapshot of 'production-db' with the name 'mydb-production-snapshot'.
C.Describe the 'production-db' DB instance.
D.Delete the 'production-db' DB instance.
Why B: Option C is correct because the policy allows CreateDBSnapshot on resources matching 'mydb-*', but the snapshot name must match that pattern. Option A is wrong because DeleteDBInstance is denied. Option B is wrong because the user can create snapshots matching the pattern. Option D is wrong because the user can describe instances.
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Question Discussion
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