SAP-C02 Design for New Solutions Practice Question
This SAP-C02 practice question tests your understanding of design for new solutions. 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 designing a serverless application using AWS Lambda. The function needs to access a VPC resource. What is the correct way to configure this?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
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Assign the Lambda function to the VPC and configure a security group
Lambda functions must be attached to a VPC and assigned a security group to access resources within the VPC, such as an RDS database or an Elasticache cluster. This configuration creates an elastic network interface (ENI) in the VPC, allowing the function to communicate with VPC resources via private IP addresses. The security group acts as a virtual firewall to control inbound and outbound traffic for the Lambda function.
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.
Assign the Lambda function to the VPC and configure a security group
Why this is correct
Lambda in VPC requires a security group and VPC configuration.
Related concept
Read the scenario before looking for a memorised answer.
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Set up a VPC peering connection
Why it's wrong here
VPC Peering is not required for Lambda to access resources in the same VPC.
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Configure a NAT Gateway in the public subnet
Why it's wrong here
NATGateway is for outbound internet from private subnets.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse external connectivity (Internet Gateway, NAT Gateway) with internal VPC access, mistakenly thinking those components are required for a Lambda function to reach resources within the same VPC.
Detailed technical explanation
How to think about this question
When a Lambda function is attached to a VPC, AWS creates an ENI in the specified subnets using the AWSLambdaVPCAccessExecutionRole IAM policy. The function's traffic is routed through the VPC's routing tables, and the security group must allow the necessary outbound rules (e.g., TCP 3306 for MySQL) to reach the target resource. A common pitfall is forgetting that Lambda functions in a VPC lose internet access unless a NATGateway or VPC endpoint is configured, which is separate from accessing internal VPC resources.
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 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 exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Design for New Solutions — This question tests Design for New Solutions — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Assign the Lambda function to the VPC and configure a security group — Lambda functions must be attached to a VPC and assigned a security group to access resources within the VPC, such as an RDS database or an Elasticache cluster. This configuration creates an elastic network interface (ENI) in the VPC, allowing the function to communicate with VPC resources via private IP addresses. The security group acts as a virtual firewall to control inbound and outbound traffic for the Lambda function.
What should I do if I get this SAP-C02 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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