Oracle Database@AWS Architect Professional Advanced Practice Exam: Hard Questions 2025

A financial services company is migrating a latency-sensitive Oracle workload to Oracle Database@AWS. They require (1) single-writer OLTP performance, (2) read scaling for reporting, and (3) the ability to fail over within the AWS Region without changing application connection strings. The team proposes using Oracle Data Guard with a physical standby for HA and multiple read replicas. Which architecture best meets the requirements with minimal application change and correct use of Oracle capabilities on Oracle Database@AWS?

An enterprise uses OCI IAM as its identity provider and wants engineers to access Oracle Database@AWS resources using corporate SSO with least privilege. Requirements: (1) short-lived credentials, (2) centralized identity lifecycle in OCI, (3) no long-lived access keys in AWS accounts, and (4) enforce MFA. Which approach best satisfies these requirements?

A team provisions Oracle Database@AWS in a dedicated AWS account connected to their hub VPC via AWS Transit Gateway (TGW). Application VPCs attach to the same TGW. Connectivity tests show that applications can reach the database listener, but database connections intermittently hang during authentication and large result sets time out. Packet captures indicate path MTU issues. Which change is the most appropriate and least disruptive to stabilize connectivity?

You are onboarding multiple Oracle Database@AWS environments (dev/test/prod) into an enterprise landing zone. The security team requires: (1) separation of duties, (2) ability to restrict who can create database systems, (3) mandatory tagging for cost allocation, and (4) prevent privilege escalation via IAM policy edits. Which combination of controls is most appropriate?

An application in one VPC must connect to Oracle Database@AWS in another VPC using private IPs only. The connection works, but DNS resolution of the database hostname fails from the application VPC. The database hostname resolves correctly within the database VPC. The enterprise standard requires keeping separate private hosted zones per environment and avoiding hard-coded IPs. What is the best solution?

A mission-critical workload on Oracle Database@AWS experiences sporadic spikes in commit latency. AWR shows high 'log file sync' waits correlated with bursts of application commits. Network metrics look normal. The operations team suspects redo I/O saturation. Which action is the most appropriate first step to validate and mitigate the issue without changing application code?

A company uses Oracle Data Guard for HA between two Oracle Database@AWS instances in different Availability Zones. They observe that during a failover test, the application reconnects but later reports missing recent transactions that were committed just before the failover. The configuration uses asynchronous transport and the team set protection mode to maximize performance. What change best addresses the data loss concern while keeping failover automated?

Your organization requires end-to-end encryption in transit from applications to Oracle Database@AWS and also mandates that database administrators cannot bypass encryption controls. Applications are heterogeneous (JDBC, ODP.NET, Python). Which approach best meets the requirement with the least operational risk?

A global company needs a DR strategy for Oracle Database@AWS that meets these goals: (1) withstand a full AWS Region outage, (2) minimize data loss, (3) allow periodic DR testing without extended production impact, and (4) maintain strong security boundaries. Which design is most appropriate?

A regulated customer requires that all administrative access to Oracle Database@AWS be fully audited end-to-end, including (1) who assumed which AWS role, (2) which control plane actions were performed, and (3) which database-level privileged commands were executed. They also require tamper-resistant log storage and separation of duties between DBAs and security auditors. Which solution best meets these requirements?