PAS-C01 Technology Practice Question
An SAP system on AWS is using a Multi-AZ deployment for high availability. The SAP Central Services (ASCS) and Enqueue Replication Server (ERS) are running on separate EC2 instances. During a failover test, the ASCS instance fails, but the ERS does not take over. What is the most likely cause?
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 floating IP address is not configured to move to the ERS instance
SAP Enqueue Replication requires a floating IP address (using AWS Elastic IP or Route 53) that moves from ASCS to ERS during failover. If the floating IP is not properly configured, the ERS cannot take over. DNS resolution is not the primary method. Health checks are not the issue. Instance type is irrelevant.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
The ERS instance does not have the required security group rules
Why it's wrong here
Security groups may block traffic but would not prevent the ERS from taking over the role.
- ✗
The DNS TTL is set too high
Why it's wrong here
DNS is not used for SAP enqueue replication failover.
- ✗
The ERS instance is in a different subnet
Why it's wrong here
Subnet difference does not prevent failover if routing is correct.
- ✓
The floating IP address is not configured to move to the ERS instance
Why this is correct
Without floating IP reassignment, clients cannot reach the ERS.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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.