The answer is to enable HANA system replication and configure ASCS with enqueue replication across the two AZs. This is the most important step because a true multi-AZ failover for SAP HANA and ASCS/ERS requires both the database layer and the central services layer to be replicated across Availability Zones; HANA system replication provides synchronous or asynchronous database failover, while enqueue replication ensures the lock table is mirrored from the ASCS to the ERS instance, allowing the SAP system to continue processing without data loss if an entire AZ fails. On the AWS Certified SAP on AWS Specialty PAS-C01 exam, this scenario tests your understanding that high availability for SAP on AWS is not achieved by DNS routing or load balancers alone—those handle traffic distribution, not stateful service failover. A common trap is assuming a single ELB or Route53 health checks can replace proper SAP-level replication. Memory tip: think “DB + Lock = Cross-AZ Rock”—you must replicate both the database (HANA) and the lock manager (ASCS/ERS) to survive an AZ outage.
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 Basis administrator is deploying a new SAP S/4HANA system on AWS. The architecture uses a multi-AZ deployment for high availability: primary database in us-east-1a, standby in us-east-1b. The ASCS instance is in us-east-1a with a replicated enqueue server (ERS) in us-east-1b. For the application servers, two instances are in us-east-1a and two in us-east-1b. The administrator needs to ensure that the SAP system remains available if an entire Availability Zone fails. What is the MOST important configuration step to achieve this?
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 the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Enable HANA system replication and configure ASCS with enqueue replication across the two AZs.
Option D is correct because cross-AZ failover for both database and SAP central services requires proper configuration of HANA system replication and enqueue replication. Option A is wrong because Route53 routing is not sufficient for automatic failover of SAP services; it only handles DNS. Option B is wrong because a single ELB does not provide cross-AZ failover for the database. Option C is wrong because increasing instance size does not improve availability.
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.
✗
Configure Amazon Route53 with a failover routing policy for the SAP application URLs.
Why it's wrong here
DNS failover alone does not manage SAP service failover.
✗
Place an Application Load Balancer in front of the database instances.
Why it's wrong here
ALB does not handle database failover.
✓
Enable HANA system replication and configure ASCS with enqueue replication across the two AZs.
Why this is correct
These are the standard SAP HA mechanisms for cross-AZ 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.
✗
Use larger instance types for all SAP instances to handle the load.
Why it's wrong here
Instance size does not impact availability.
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.
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 HANA system replication and configure ASCS with enqueue replication across the two AZs. — Option D is correct because cross-AZ failover for both database and SAP central services requires proper configuration of HANA system replication and enqueue replication. Option A is wrong because Route53 routing is not sufficient for automatic failover of SAP services; it only handles DNS. Option B is wrong because a single ELB does not provide cross-AZ failover for the database. Option C is wrong because increasing instance size does not improve availability.
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.
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Question Discussion
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