- A
Increase the DNS TTL to 300 seconds to reduce lookups and rely on the Pacemaker VIP update.
Why wrong: Increasing TTL makes the failure recovery slower because clients will cache the old IP longer.
- B
Assign an Elastic IP address to the active node and use a script to reassign it during failover.
Why wrong: Elastic IP reassignment involves API calls and can take tens of seconds, plus the time to update ARP caches.
- C
Reduce the Route 53 health check interval to 10 seconds and lower the DNS TTL to 60 seconds.
Why wrong: Even with reduced intervals, DNS caching and propagation delays can still cause minutes of downtime.
- D
Place the SAP HANA database behind an internal Network Load Balancer (NLB) and use the NLB's TCP health checks to route traffic to the active instance.
NLB provides fast health checks (every 10 seconds) and immediate traffic rerouting without DNS delays, enabling sub-second failover.
PAS-C01 Technology Practice Question
This PAS-C01 practice question tests your understanding of technology. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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 running SAP S/4HANA on AWS with a high-availability setup using SAP HANA System Replication and a Pacemaker cluster. The cluster consists of two EC2 instances in different Availability Zones, each with an EBS volume for HANA data. The cluster uses a virtual IP address (VIP) managed by the AWS Route 53 health check and failover mechanism. During a recent failover test, the secondary node took over as primary, but the application was unable to connect to the database for several minutes. The investigation reveals that the VIP did not update correctly. The company wants to ensure fast and reliable VIP failover. What should the team do to improve the failover time?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue:
"primary"Why it matters: Asks for the main purpose or function, not a secondary benefit. Eliminate answers that describe side-effects or partial functions.
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
Place the SAP HANA database behind an internal Network Load Balancer (NLB) and use the NLB's TCP health checks to route traffic to the active instance.
Option C is correct. Using an internal Network Load Balancer (NLB) as a database endpoint provides a static IP that can be redirected to the active HANA node. The NLB health check can quickly detect the failure and reroute traffic to the healthy secondary instance. Option A is incorrect because Route 53 health checks have a default interval of 30 seconds and DNS TTL can cause delays. Option B is incorrect because EIP reassignment requires API calls and may take longer. Option D is incorrect because increasing the TTL would make failover slower, not faster.
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.
- ✗
Increase the DNS TTL to 300 seconds to reduce lookups and rely on the Pacemaker VIP update.
Why it's wrong here
Increasing TTL makes the failure recovery slower because clients will cache the old IP longer.
- ✗
Assign an Elastic IP address to the active node and use a script to reassign it during failover.
Why it's wrong here
Elastic IP reassignment involves API calls and can take tens of seconds, plus the time to update ARP caches.
- ✗
Reduce the Route 53 health check interval to 10 seconds and lower the DNS TTL to 60 seconds.
Why it's wrong here
Even with reduced intervals, DNS caching and propagation delays can still cause minutes of downtime.
- ✓
Place the SAP HANA database behind an internal Network Load Balancer (NLB) and use the NLB's TCP health checks to route traffic to the active instance.
Why this is correct
NLB provides fast health checks (every 10 seconds) and immediate traffic rerouting without DNS delays, enabling sub-second failover.
Clue confirmation
The clue word "primary" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
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.
- Use explanations to understand the rule behind the answer.
TExam Day Tips
- Underline the problem statement mentally.
- 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.
What to study next
Got this wrong? Here's your next step.
Identify which PAS-C01 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
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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: Place the SAP HANA database behind an internal Network Load Balancer (NLB) and use the NLB's TCP health checks to route traffic to the active instance. — Option C is correct. Using an internal Network Load Balancer (NLB) as a database endpoint provides a static IP that can be redirected to the active HANA node. The NLB health check can quickly detect the failure and reroute traffic to the healthy secondary instance. Option A is incorrect because Route 53 health checks have a default interval of 30 seconds and DNS TTL can cause delays. Option B is incorrect because EIP reassignment requires API calls and may take longer. Option D is incorrect because increasing the TTL would make failover slower, not faster.
What should I do if I get this PAS-C01 question wrong?
Identify which PAS-C01 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Are there clue words in this question I should notice?
Yes — watch for: "primary". Asks for the main purpose or function, not a secondary benefit. Eliminate answers that describe side-effects or partial functions.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
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Last reviewed: Jun 20, 2026
This PAS-C01 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 PAS-C01 exam.
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