- A
Disable cross-zone load balancing on the ALB.
Why wrong: Disabling cross-zone load balancing reduces capacity and may worsen issue.
- B
Increase the number of Web Dispatcher instances in each Availability Zone.
Why wrong: More instances may help with load but not session persistence.
- C
Enable deletion protection on the ALB.
Why wrong: Deletion protection prevents accidental deletion, not session drops.
- D
Enable sticky sessions (session affinity) on the ALB target group.
Sticky sessions ensure requests from a user go to the same instance.
Question 1,639 of 1,733
PAS-C01 Technology Practice Question
This PAS-C01 practice question tests your understanding of technology. 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.
An SAP system is deployed across multiple Availability Zones using an Application Load Balancer (ALB) for the SAP Web Dispatcher. Users report that sessions are frequently dropped during peak hours. Which configuration change should resolve this?
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 (session affinity) on the ALB target group.
Option D is correct because enabling sticky sessions (session affinity) on the ALB target group ensures that all requests from a user session are routed to the same Web Dispatcher instance. Without session affinity, the ALB distributes requests across multiple Web Dispatcher instances, and if the session state is stored locally on each instance, subsequent requests may land on a different instance that does not have the session data, causing the session to be dropped. This is a common issue during peak hours when the load balancer distributes traffic more aggressively.
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.
- ✗
Disable cross-zone load balancing on the ALB.
Why it's wrong here
Disabling cross-zone load balancing reduces capacity and may worsen issue.
- ✗
Increase the number of Web Dispatcher instances in each Availability Zone.
Why it's wrong here
More instances may help with load but not session persistence.
- ✗
Enable deletion protection on the ALB.
Why it's wrong here
Deletion protection prevents accidental deletion, not session drops.
- ✓
Enable sticky sessions (session affinity) on the ALB target group.
Why this is correct
Sticky sessions ensure requests from a user go to the same instance.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may confuse horizontal scaling (Option B) with solving session persistence issues, not realizing that adding more instances without sticky sessions actually worsens the problem by increasing the chance of a request landing on an instance without the session context.
Detailed technical explanation
How to think about this question
Sticky sessions on an ALB are implemented using a cookie (AWSALB or AWSALBAPP) that the load balancer inserts into the client's response. The ALB then uses this cookie to route subsequent requests from the same client to the same target. In SAP Web Dispatcher deployments, session affinity is critical because the Web Dispatcher maintains user session data in memory; without it, a request to a different instance would require re-authentication or session recreation. The ALB supports both duration-based and application-controlled cookie stickiness, and for SAP, the application-controlled cookie is often preferred to align with SAP's own session management.
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
An e-commerce site experiences heavy traffic on Black Friday and near-zero traffic during off-peak weeks. Rather than provisioning permanent large VMs, the team uses auto-scaling groups that add capacity automatically under load and reduce it overnight. Questions like this test whether you understand elasticity, availability zones, and cloud compute scaling patterns.
Visual reference
What to study next
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FAQ
Questions learners often ask
What does this PAS-C01 question test?
Technology — This question tests Technology — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Enable sticky sessions (session affinity) on the ALB target group. — Option D is correct because enabling sticky sessions (session affinity) on the ALB target group ensures that all requests from a user session are routed to the same Web Dispatcher instance. Without session affinity, the ALB distributes requests across multiple Web Dispatcher instances, and if the session state is stored locally on each instance, subsequent requests may land on a different instance that does not have the session data, causing the session to be dropped. This is a common issue during peak hours when the load balancer distributes traffic more aggressively.
What should I do if I get this PAS-C01 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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Last reviewed: Jul 4, 2026
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