20+ practice questions focused on Reliability and Business Continuity — one of the most tested topics on the AWS Certified SysOps Administrator Associate SOA-C02 exam. Each question includes a detailed explanation so you learn why the right answer is correct.
Start Reliability and Business Continuity PracticeA company runs a web application on two EC2 instances in different Availability Zones, each with an Elastic IP address. The SysOps administrator needs to automatically route traffic to the healthy instance and fail over if one instance becomes unhealthy. The application must be accessible via a single DNS name. Which Route 53 routing policy should be used?
Explanation: The failover routing policy in Amazon Route 53 is designed to route traffic from a primary resource to a secondary resource when the primary becomes unhealthy. In this scenario, the two EC2 instances in different Availability Zones act as primary and secondary endpoints, and Route 53 uses health checks to monitor the primary instance. If the health check fails, Route 53 automatically fails over to the secondary instance, ensuring the application remains accessible via a single DNS name.
A company runs a critical application on Amazon ECS with the EC2 launch type. The application must remain available if a single Availability Zone fails. The SysOps administrator needs to configure the ECS service for high availability. Which configuration should be used?
Explanation: Using a spread placement strategy across multiple Availability Zones ensures that ECS tasks are distributed across distinct zones, so the application remains available if a single zone fails. With the EC2 launch type, the spread strategy can be applied at the Availability Zone level, and ECS automatically manages task placement to maintain the desired distribution. This configuration meets the high availability requirement by eliminating a single point of failure at the zone level.
A company runs a stateful application on a single Amazon EC2 instance with a 200 GB EBS volume. The application data changes frequently. The SysOps administrator needs a disaster recovery (DR) plan with a Recovery Point Objective (RPO) of 1 hour and a Recovery Time Objective (RTO) of 15 minutes. The DR region is us-west-2. Which combination of steps should the administrator implement?
Explanation: Option A is correct: Take hourly EBS snapshots and copy them to us-west-2 using the EC2 CopySnapshot API. This meets the RPO of 1 hour. In a disaster, create a volume from the snapshot and attach it to a new instance, meeting the RTO of 15 minutes. Option B is incorrect because using both DLM and AWS Backup in that manner is not a valid architecture; AWS Backup copies recovery points it manages, not arbitrary DLM snapshots. DLM can handle cross-region copy directly, or AWS Backup can be used alone to create and copy snapshots.
A SysOps administrator needs to set up automated backups for a production Amazon RDS for PostgreSQL DB instance and copy the snapshots to another AWS Region for disaster recovery. Order the steps the administrator should take to implement this cross-region snapshot copy. (Drag each step to the correct order from first to last.) (Choose 4.)
Explanation: Automated backups must be enabled on the source RDS for PostgreSQL DB instance to generate the necessary snapshots for cross-region copying. Without automated backups, there are no snapshots to copy, and the cross-region copy feature relies on these automated snapshots as the source.
A company is designing a highly available architecture for a web application. The application uses an Application Load Balancer (ALB) and an Auto Scaling group of EC2 instances. Which TWO steps should the company take to ensure the architecture is resilient to an Availability Zone failure? (Select TWO.)
Explanation: Option C is correct because an Auto Scaling group that spans at least two Availability Zones can continue serving traffic from the surviving AZ when one AZ fails, and the ASG will also attempt to rebalance capacity across the remaining healthy AZs. Option E is correct because an internet-facing ALB with cross-zone load balancing distributes traffic evenly across all registered targets in all enabled AZs, so if one AZ becomes unavailable, the load balancer routes requests to healthy targets in the other AZs. Option A is not correct because simply raising desired capacity does not provide AZ redundancy if all instances are still placed in a single AZ or if the ASG is not configured across multiple AZs. Option B is not correct because a CloudWatch alarm on ALB 5xx errors only detects failures; it does not by itself make the architecture resilient to an AZ outage. Option D is not correct because using a single EC2 instance type does not address AZ failure resilience and may even reduce flexibility in capacity recovery.
+15 more Reliability and Business Continuity questions available
Practice all Reliability and Business Continuity questions1. Baseline your knowledge
Start with 10 questions to gauge your current understanding of Reliability and Business Continuity. This tells you whether you need a concept refresher or just practice.
2. Review every explanation
For each question — right or wrong — read the full explanation. Understanding why an answer is correct is more valuable than knowing the answer itself.
3. Focus on exam traps
Reliability and Business Continuity questions on the SOA-C02 frequently use trap wording. Look for subtle differences in answers that test your precision, not just general knowledge.
4. Reach 80% consistently
Do repeated sessions until you score 80%+ three times in a row. Then move to mixed-mode practice to test cross-topic recall under realistic conditions.
The exact number varies per candidate. Reliability and Business Continuity is tested as part of the AWS Certified SysOps Administrator Associate SOA-C02 blueprint. Practicing with targeted Reliability and Business Continuity questions ensures you can handle any format or difficulty that appears.
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Difficulty is subjective, but Reliability and Business Continuity is a high-priority exam concept tested in multiple ways — direct recall, scenario analysis, and command-output interpretation. Consistent practice is the best way to build confidence.
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