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SOA-C03 Reliability Question Bank (12 Questions)

Browse all 12 practice questions covering AWS Reliability and Business Continuity for the SOA-C03 certification exam. Answers are intentionally hidden on this page so you can self-test first before checking results in quiz mode.

Question 1Reliability & Business Continuity
A company operates a mission-critical application using an Amazon RDS for MySQL Multi-AZ DB instance in us-east-1. The disaster recovery requirement mandates an RPO of 1 hour and an RTO of 30 minutes with a failover target in us-west-2. Which architecture meets these requirements with the LEAST operational effort?
ACreate a cross-Region read replica in us-west-2 and use a Route 53 health check with failover routing to promote the replica during disaster
BConfigure automated RDS snapshots every hour and use AWS Lambda to copy snapshots to us-west-2; restore during disaster
CSet up AWS DMS for continuous replication from us-east-1 to a standby RDS instance in us-west-2
DUse Amazon Aurora Global Database with a secondary cluster in us-west-2
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Question 2Select All That ApplyReliability & Business Continuity
A company hosts a critical web application in us-east-1 and needs a disaster recovery strategy with an RTO of less than 1 hour and an RPO of less than 15 minutes. The solution must minimize ongoing costs when not in a disaster scenario. (Select TWO.)
AUse a warm standby strategy with a scaled-down version of the production environment running in us-west-2.
BUse a pilot light strategy with only the database replicated to us-west-2, and AMIs pre-built for the application tier.
CConfigure Aurora Global Database with a secondary cluster in us-west-2 for near-zero RPO on the data tier.
DUse a backup and restore strategy with cross-region S3 replication for backups and pre-written CloudFormation templates.
EDeploy a full multi-site active-active configuration across both regions with Route 53 weighted routing.
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Question 3Reliability & Business Continuity
A SysOps administrator is designing a disaster recovery strategy for an application that requires an RTO of 1 hour and an RPO of 15 minutes. The application uses Amazon RDS PostgreSQL. Which DR strategy meets these requirements at the LOWEST cost?
AUse a Multi-AZ RDS deployment with automated failover
BCreate cross-region read replicas and promote during disaster
CUse AWS DMS for continuous replication to a standby region
DTake automated RDS snapshots every 15 minutes and copy to the DR region
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Question 4Reliability & Business Continuity
A company requires an RTO of 15 minutes and an RPO of 1 minute for their primary relational database. The database is currently a 2 TB Amazon RDS for PostgreSQL Multi-AZ instance in us-east-1. Which architecture satisfies both the RTO and RPO requirements?
AEnable automated backups with a 5-minute backup window and deploy a cross-Region read replica in us-west-2
BMigrate to Amazon Aurora PostgreSQL with Aurora Global Database; configure a secondary Region in us-west-2
CUse AWS DMS with change data capture for continuous replication to an RDS instance in us-west-2
DUse RDS automated snapshots every minute and copy them to us-west-2
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Question 5Reliability and Business Continuity
A SysOps administrator must implement a disaster recovery strategy with an RTO of less than 1 hour and RPO of less than 15 minutes for a database. Which DR strategy meets these requirements at the LOWEST cost?
AMulti-site active/active
BWarm standby
CPilot light
DBackup and restore
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Question 6Reliability & Business Continuity
A company runs a production MySQL database on Amazon RDS with a Multi-AZ deployment and a read replica in a different Region for disaster recovery. During a DR test, the team needs to promote the cross-Region read replica to a standalone database. What should the administrator understand about this promotion process?
AThe promoted instance automatically becomes a Multi-AZ deployment and retains the replication link to the source
BPromotion breaks the replication link, the new instance becomes a standalone single-AZ RDS instance, and a new backup must be taken immediately since the promoted replica has no automated backups initially
CThe cross-Region read replica cannot be promoted; the administrator must restore from a cross-Region snapshot instead
DPromotion is instantaneous and the promoted instance inherits all the parameter group settings, option group, and automated backup configuration from the source
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Question 7Reliability and Business Continuity
A SysOps administrator uses Amazon RDS Multi-AZ for high availability. During a Multi-AZ failover, what happens to the DNS endpoint?
AThe endpoint changes to the standby instance's new DNS name
BThe DNS endpoint remains the same but resolves to the standby instance's IP after failover
CApplications must manually update their connection strings
DThe primary instance's IP address is reassigned to the standby
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Question 8Reliability & Business Continuity
A company stores critical data in Amazon EFS across multiple Availability Zones. The disaster recovery plan requires the file system to be replicated to a secondary Region with an RPO of 15 minutes. Which solution meets the requirement with the LEAST operational overhead?
AUse AWS DataSync to schedule transfers from the primary EFS to a secondary EFS in another Region every 15 minutes
BEnable Amazon EFS replication to automatically replicate the file system to a destination Region
CMount the EFS file system on EC2 instances in both Regions using VPC peering
DBack up EFS using AWS Backup and restore to the secondary Region when needed
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Question 9Reliability & Business Continuity
A company needs to implement a disaster recovery strategy for EBS volumes in us-east-1 with a recovery point objective (RPO) of 1 hour in eu-west-1. The solution should be automated and require minimal operational effort. Which approach meets these requirements?
ACreate EBS snapshots every hour using Amazon Data Lifecycle Manager (DLM) and configure a cross-region copy rule to eu-west-1 in the same DLM policy.
BUse AWS Backup with a backup plan that takes hourly EBS snapshots and a copy rule that replicates them to eu-west-1.
CCreate a Lambda function on an hourly EventBridge schedule that calls `CreateSnapshot` and `CopySnapshot` with the destination region parameter.
DEnable EBS replication to eu-west-1 using EBS Multi-Region replication.
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Question 10Select All That ApplyReliability & Business Continuity
A company's disaster recovery plan classifies workloads into tiers. Tier 1 requires RTO < 5 minutes, Tier 2 requires RTO < 1 hour, and Tier 3 requires RTO < 24 hours. Which DR strategies correctly match these tiers? (Select TWO.)
ATier 1 — Multi-site active/active
BTier 2 — Backup and restore
CTier 2 — Warm standby
DTier 3 — Pilot light
ETier 1 — Pilot light
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Question 11Reliability & Business Continuity
A company operates a customer-facing web application that must have an RTO of 1 hour and an RPO of 15 minutes. The production environment runs in us-east-1. The DR budget is limited. Which DR strategy BEST meets these requirements?
ABackup and restore: take automated snapshots every 15 minutes and restore in us-west-2 during disaster
BPilot light: keep core infrastructure (RDS replica, minimal compute) running in us-west-2 and scale up during failover
CWarm standby: maintain a scaled-down but fully functional copy of the production environment in us-west-2
DMulti-site active/active: run full production capacity in both regions simultaneously
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Question 12Reliability and Business Continuity
A SysOps administrator is designing for an RTO of 4 hours and RPO of 24 hours for a non-critical workload. Which DR strategy is MOST cost-effective?
AMulti-site active/active
BWarm standby
CBackup and restore
DPilot light
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Key Reliability Concepts for SOA-C03

reliabilityhigh availabilityfault tolerancemulti-azdisaster recoveryrportoquota

SOA-C03 Reliability Exam Tips

AWS Reliability and Business Continuity questions in SOA-C03 are typically scenario-based. Focus on operations, observability, incident response, and automated remediation. Priority concepts: reliability, high availability, fault tolerance, multi-az, disaster recovery, rpo.

What SOA-C03 Expects

Anchor your answer in prioritize operational visibility and repeatable runbook-ready automation.
Reliability scenarios for SOA-C03 are frequently mapped to Domain 2 (22%), so read the objective carefully before picking controls or architecture.
Expect multi-topic scenarios where Reliability interacts with IAM, networking, storage, or observability patterns rather than appearing as an isolated question.
When two options are both technically valid, prefer the choice that best aligns with the exam's operational scope (Associate) and vendor best practices.

High-Value Reliability Concepts

Know the core Reliability building blocks cold: reliability, high availability, fault tolerance, multi-az.
Review the edge-case features and limits for disaster recovery, rpo; these details are commonly used to differentiate answer choices.
Practice service-integration reasoning: how Reliability pairs with Backup & Recovery, Auto Scaling, Route 53, RDS in real deployment patterns.
For SOA-C03, explain why the chosen Reliability design meets reliability, security, and cost expectations better than the alternatives.

Common SOA-C03 Traps

Watch for answers that deploy quickly but are hard to monitor or recover.
Questions in Reliability and Business Continuity often include distractors that look correct for Reliability but violate least-privilege, durability, or availability requirements.
Avoid picking options purely by feature name; validate data path, failure handling, and governance impact before answering.
If the prompt hints at automation or repeatability, eliminate manual-only operational answers first.

Fast Review Checklist

Can you compare at least two Reliability implementation paths and justify which one best fits the scenario?
Can you map the chosen answer back to Reliability and Business Continuity (22%) outcomes for SOA-C03?
Can you explain security and access boundaries for Reliability without relying on default-open assumptions?
Can you describe how Reliability integrates with Backup & Recovery and Auto Scaling during failure, scaling, and monitoring events?

Exam Domains Covering Reliability

Domain 2Reliability and Business Continuity22%

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