- A
Cross-zone load balancing is disabled.
Why wrong: Disabling cross-zone can cause uneven distribution across zones, but not the primary cause.
- B
Connection draining is not enabled.
Why wrong: Connection draining affects in-flight requests during deregistration.
- C
The load balancer uses a flow hash algorithm that may not evenly distribute requests with many long-lived connections.
Classic Load Balancer's flow hash can lead to uneven distribution for persistent connections.
- D
The health check interval is set too high.
Why wrong: Health checks only affect routing to healthy instances.
Question 1,438 of 1,733
PAS-C01 Technology Practice Question
This PAS-C01 practice question tests your understanding of technology. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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 running on EC2 and uses a Classic Load Balancer to distribute traffic to web dispatchers. The operations team notices that the load balancer is not distributing traffic evenly. What is the most likely cause?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue:
"most likely"Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
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
✓
The load balancer uses a flow hash algorithm that may not evenly distribute requests with many long-lived connections.
Classic Load Balancers use a flow hash algorithm based on the source IP, destination IP, source port, destination port, and protocol to route requests. This algorithm can cause uneven distribution when many long-lived connections (such as SAP GUI or HTTP persistent connections) are present, because the same flow hash consistently maps to the same backend instance, leading to imbalance. This is the most likely cause given the scenario of an SAP system with web dispatchers.
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.
- ✗
Cross-zone load balancing is disabled.
Why it's wrong here
Disabling cross-zone can cause uneven distribution across zones, but not the primary cause.
- ✗
Connection draining is not enabled.
Why it's wrong here
Connection draining affects in-flight requests during deregistration.
- ✓
The load balancer uses a flow hash algorithm that may not evenly distribute requests with many long-lived connections.
Why this is correct
Classic Load Balancer's flow hash can lead to uneven distribution for persistent connections.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
The health check interval is set too high.
Why it's wrong here
Health checks only affect routing to healthy instances.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often assume uneven traffic distribution is always due to misconfigured health checks or cross-zone settings, but the real issue is the flow hash algorithm's behavior with long-lived connections, which is a specific characteristic of Classic Load Balancers.
Detailed technical explanation
How to think about this question
The Classic Load Balancer uses a flow hash algorithm (often based on a 5-tuple hash) to ensure session stickiness without requiring sticky sessions, but this can lead to uneven distribution when connections are long-lived because the hash mapping remains static for the duration of the connection. In contrast, Application Load Balancers use a round-robin algorithm by default, which distributes requests more evenly. For SAP systems with many persistent connections, enabling sticky sessions or using an ALB with a round-robin algorithm can mitigate this imbalance.
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 cloud solutions architect for a retail company is evaluating services for a new workload. The correct answer here reflects best practice for the specific scenario described — not a general cloud recommendation. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Cloud exam questions reward reading the constraint carefully: the same technology can be right or wrong depending on the use case.
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.
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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: The load balancer uses a flow hash algorithm that may not evenly distribute requests with many long-lived connections. — Classic Load Balancers use a flow hash algorithm based on the source IP, destination IP, source port, destination port, and protocol to route requests. This algorithm can cause uneven distribution when many long-lived connections (such as SAP GUI or HTTP persistent connections) are present, because the same flow hash consistently maps to the same backend instance, leading to imbalance. This is the most likely cause given the scenario of an SAP system with web dispatchers.
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.
Are there clue words in this question I should notice?
Yes — watch for: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
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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