- A
Place an Application Load Balancer (ALB) in front of two ASCS instances in different Availability Zones.
Why wrong: ALB does not natively support SAP ASCS failover protocols; ASCS requires a virtual IP or DNS-based failover.
- B
Deploy ASCS on a single EC2 instance with multiple Elastic Network Interfaces (ENIs).
Why wrong: Multiple ENIs increase network throughput but do not provide automatic failover for the ASCS service.
- C
Use Amazon CloudFront to distribute traffic to multiple ASCS instances in different Availability Zones.
Why wrong: CloudFront is a content delivery network, not suitable for SAP ASCS failover routing.
- D
Configure Amazon Route 53 with health checks to failover to a secondary ASCS instance in a different Availability Zone.
Route 53 health checks can monitor the primary ASCS and automatically route traffic to a standby instance in another AZ.
PAS-C01 Design of SAP Workloads on AWS Practice Question
This PAS-C01 practice question tests your understanding of design of sap workloads on aws. 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 designing an SAP S/4HANA workload on AWS. The system must be highly available within a single AWS Region. Which architecture ensures automatic failover for the SAP Central Services (ASCS) instance?
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
Configure Amazon Route 53 with health checks to failover to a secondary ASCS instance in a different Availability Zone.
Option D is correct because Amazon Route 53 with health checks can monitor the primary ASCS instance and automatically fail over DNS resolution to a secondary ASCS instance in a different Availability Zone. This provides the necessary automatic failover for SAP Central Services (ASCS) without requiring a shared filesystem or cluster manager, as Route 53 health checks detect instance or service failure and update DNS records accordingly.
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.
- ✗
Place an Application Load Balancer (ALB) in front of two ASCS instances in different Availability Zones.
Why it's wrong here
ALB does not natively support SAP ASCS failover protocols; ASCS requires a virtual IP or DNS-based failover.
- ✗
Deploy ASCS on a single EC2 instance with multiple Elastic Network Interfaces (ENIs).
Why it's wrong here
Multiple ENIs increase network throughput but do not provide automatic failover for the ASCS service.
- ✗
Use Amazon CloudFront to distribute traffic to multiple ASCS instances in different Availability Zones.
Why it's wrong here
CloudFront is a content delivery network, not suitable for SAP ASCS failover routing.
- ✓
Configure Amazon Route 53 with health checks to failover to a secondary ASCS instance in a different Availability Zone.
Why this is correct
Route 53 health checks can monitor the primary ASCS and automatically route traffic to a standby instance in another AZ.
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 often assume a load balancer (ALB) is required for high availability, but SAP ASCS uses proprietary protocols that ALB cannot inspect or health-check, making DNS-based failover with Route 53 the correct AWS-native approach.
Detailed technical explanation
How to think about this question
Route 53 failover routing uses DNS-based failover with a configurable health check interval (default 30 seconds) and a failure threshold (default 3 consecutive failures) to switch traffic to the secondary ASCS instance. Under the hood, Route 53 updates the DNS record's TTL (commonly set to 60 seconds) to control propagation delay, but clients may cache DNS responses, so failover is not instantaneous. In a real-world scenario, this architecture is often combined with an SAP ENSA2 enqueue replication setup to ensure the secondary instance can take over the lock table state.
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.
What to study next
Got this wrong? Here's your next step.
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FAQ
Questions learners often ask
What does this PAS-C01 question test?
Design of SAP Workloads on AWS — This question tests Design of SAP Workloads on AWS — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Configure Amazon Route 53 with health checks to failover to a secondary ASCS instance in a different Availability Zone. — Option D is correct because Amazon Route 53 with health checks can monitor the primary ASCS instance and automatically fail over DNS resolution to a secondary ASCS instance in a different Availability Zone. This provides the necessary automatic failover for SAP Central Services (ASCS) without requiring a shared filesystem or cluster manager, as Route 53 health checks detect instance or service failure and update DNS records accordingly.
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: Jun 24, 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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