Question 1,119 of 1,660
SAP-C02 Design for New Solutions Practice Question
A company is designing a new web application that will run on Amazon EC2 instances behind an Application Load Balancer (ALB). The application must support sticky sessions. What should they do?
⚠ Common exam trap
Many exam-takers confuse stateless session management (e.g., ElastiCache) with ALB sticky sessions, or incorrectly assume that CloudFront or NLB can provide HTTP-level session affinity, when only ALB duration-based cookies directly satisfy the requirement for sticky sessions on the load balancer.
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
✓
Enable sticky sessions on the ALB using duration-based cookies.
Application Load Balancers natively support sticky sessions (session affinity) using duration-based cookies. The ALB generates a cookie (AWSALB) that binds a user's session to a specific target instance for the duration of the cookie's lifetime, ensuring consistent user experience without external dependencies.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Configure an Amazon CloudFront distribution with session affinity.
Why it's wrong here
CloudFront session affinity is for edge caching, not for ALB.
- ✗
Store session data in Amazon ElastiCache and use a cookie to reference it.
Why it's wrong here
This is a possible solution but not a load balancer feature; the question asks what to do with the load balancer.
- ✓
Enable sticky sessions on the ALB using duration-based cookies.
Why this is correct
ALB supports sticky sessions via cookies.
- ✗
Use a Network Load Balancer (NLB) with cross-zone load balancing.
Why it's wrong here
NLB does not support sticky sessions.
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Last reviewed: Jul 4, 2026
This SAP-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 SAP-C02 exam.
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