1Z0-1123-25 Question 8
Single answerA financial services company is migrating its on-premises core banking application to Oracle Cloud Infrastructure (OCI). Before starting the migration, the team begins mapping all existing workloads, their resource utilization, and interdependencies. They also plan for future enhancements that might require refactoring. Which initial step best reflects a fundamental principle of cloud migrations to help ensure a smooth transition?
- A
Document and map the entire on-premises workload inventory, including application dependencies and resource usage.
- B
Set up a final cutover rehearsal environment to test post-migration performance on OCI.
- C
Immediately containerize all components to adopt a cloud-native microservices architecture regardless of current dependencies.
- D
Focus only on replicating network configurations, assuming the rest can be addressed after the migration.
Show answer and explanation
Correct answer: A
Explanation
A fundamental step in cloud migration involves building an accurate, detailed inventory of existing workloads and their dependencies. Oracle recommends creating a complete assessment of on-premises environments to properly size and design corresponding OCI resources. This approach ensures alignment with OCI services, correct resource allocation, and establishes a clear path for deciding whether to rehost, replatform, or refactor each workload. Refer to Oracle� Cloud Adoption Framework (CAF) and OCI migration best practices for guidelines on performing workload assessments.
- A. Correct.
Correct. Identifying and measuring the workloads, their dependencies, and specific resource requirements is essential to building an effective migration plan. This allows you to determine the right sizing, migration strategy (lift-and-shift or refactor), and plan for performance and availability on OCI.
- B. Incorrect.
Incorrect. While testing a final cutover is critical, it should occur after the initial workloads and dependencies have been properly mapped and a migration strategy has been chosen. Conducting a final rehearsal without a thorough inventory is premature.
- C. Incorrect.
Incorrect. Refactoring to microservices is a viable approach for modernization, but immediately containerizing everything before understanding current dependencies can lead to complexity and extended lead times. Proper planning and analysis should come first.
- D. Incorrect.
Incorrect. Networking is crucial but must be addressed alongside application workloads and data. Focusing solely on replicating network configurations overlooks the complexities of application interdependencies and can lead to performance or availability gaps post-migration.