PAS-C01 Operations and Maintenance Practice Question
An SAP system on AWS uses an Application Load Balancer (ALB) to distribute traffic to multiple EC2 instances. The operations team wants to enable sticky sessions (session affinity) for the ALB. Which TWO steps are required? (Choose TWO.)
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
✓
Set the stickiness duration in seconds
To enable sticky sessions on an ALB, two steps are required: First, enable stickiness (session affinity) at the target group level. Second, set the stickiness duration, which defines how long the session remains sticky. Option A is correct because setting the duration in seconds is a necessary configuration. Option E is correct because stickiness must be enabled on the target group. Option B (configure proxy protocol policy) is not related to stickiness; it is used to preserve client IP information. Option C (enable cross-zone load balancing) distributes traffic across zones but does not affect stickiness. Option D (create a custom cookie on the application server) is not required because the ALB can generate its own cookie (AWSALB) when stickiness is enabled on the target group.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Set the stickiness duration in seconds
Why this is correct
Duration controls how long the session is sticky.
- ✗
Configure a proxy protocol policy
Why it's wrong here
Proxy protocol is for Classic Load Balancer.
- ✗
Enable cross-zone load balancing
Why it's wrong here
Cross-zone load balancing distributes traffic evenly across AZs.
- ✗
Create a custom cookie on the application server
Why it's wrong here
ALB supports application-based cookies but can also generate its own.
- ✓
Enable stickiness on the target group
Why this is correct
Stickiness must be enabled on the target group.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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