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Database Security →hardMultiple ChoiceObjective-mapped

DBS-C01 Database Security Practice Question

This DBS-C01 practice question tests your understanding of database security. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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 is using Amazon Aurora MySQL-Compatible Edition. The security team wants to ensure that database credentials are not stored in application configuration files. They decide to use AWS Secrets Manager to manage credentials. The application is hosted on Amazon EC2 instances that have an IAM role attached. What is the most secure way to grant the application access to the secret?

Question 1hardmultiple choice

Read the full NAT/PAT explanation →

A
Grant the IAM role attached to the EC2 instance permissions to read the secret, and use the Secrets Manager API to retrieve it at runtime.
This is the most secure approach because the secret is never stored on the instance; it is retrieved on demand via API.
B
Store the secret in the application code and rotate it periodically.
Why wrong: Storing secrets in code is insecure and not a best practice.
C
Attach a resource-based policy to the EC2 instance allowing access to the secret.
Why wrong: EC2 instances do not support resource-based policies; IAM roles are used instead.
D
Store the secret in an encrypted S3 bucket and have the application download it at startup.
Why wrong: While encrypted, this adds complexity and the secret is still stored in a file, which can be accessed if the instance is compromised.

Full breakdown with real-world context →

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

✓

Grant the IAM role attached to the EC2 instance permissions to read the secret, and use the Secrets Manager API to retrieve it at runtime.

Option D is correct because the most secure approach is to grant the EC2 IAM role permission to read the secret using an IAM policy attached to the role, and then have the application call the Secrets Manager API to retrieve the secret at runtime. This avoids storing secrets in code or configuration files. Option A is wrong because hardcoding credentials defeats the purpose. Option B is wrong because storing the secret in a configuration file is not secure. Option C is wrong because you should not attach a resource-based policy to the EC2 instance; IAM roles are the correct mechanism.

Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.

Answer analysis

Option-by-option breakdown

For each option: why learners choose it and why it is or isn't the right answer here.

✓
Grant the IAM role attached to the EC2 instance permissions to read the secret, and use the Secrets Manager API to retrieve it at runtime.
Why this is correct
This is the most secure approach because the secret is never stored on the instance; it is retrieved on demand via API.
Related concept
Static NAT maps one inside address to one outside address.
✗
Store the secret in the application code and rotate it periodically.
Why it's wrong here
Storing secrets in code is insecure and not a best practice.
✗
Attach a resource-based policy to the EC2 instance allowing access to the secret.
Why it's wrong here
EC2 instances do not support resource-based policies; IAM roles are used instead.
✗
Store the secret in an encrypted S3 bucket and have the application download it at startup.
Why it's wrong here
While encrypted, this adds complexity and the secret is still stored in a file, which can be accessed if the instance is compromised.

Common exam traps

Common exam trap: NAT rules depend on direction and matching traffic

NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.

Detailed technical explanation

How to think about this question

NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.

KKey Concepts to Remember

Static NAT maps one inside address to one outside address.
PAT allows many inside hosts to share one public address using ports.
Inside local and inside global describe the private and translated addresses.
NAT ACLs identify traffic for translation, not always security filtering.

TExam Day Tips

Identify inside and outside interfaces first.
Check whether the scenario needs static NAT, dynamic NAT or PAT.
Do not confuse NAT matching ACLs with normal packet-filtering intent.

Key takeaway

NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.

Real-world example

How this comes up in practice

A media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.

What to study next

Got this wrong? Here's your next step.

Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related DBS-C01 NAT questions on configuration and troubleshooting.

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FAQ

Questions learners often ask

What does this DBS-C01 question test?

Database Security — This question tests Database Security — Static NAT maps one inside address to one outside address..

What is the correct answer to this question?

The correct answer is: Grant the IAM role attached to the EC2 instance permissions to read the secret, and use the Secrets Manager API to retrieve it at runtime. — Option D is correct because the most secure approach is to grant the EC2 IAM role permission to read the secret using an IAM policy attached to the role, and then have the application call the Secrets Manager API to retrieve the secret at runtime. This avoids storing secrets in code or configuration files. Option A is wrong because hardcoding credentials defeats the purpose. Option B is wrong because storing the secret in a configuration file is not secure. Option C is wrong because you should not attach a resource-based policy to the EC2 instance; IAM roles are the correct mechanism.

What should I do if I get this DBS-C01 question wrong?

What is the key concept behind this question?

Static NAT maps one inside address to one outside address.

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This DBS-C01 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 DBS-C01 exam.