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Oracle Cloud Database 2024 Migration Professional Sample Questions (Q133-Q138):
NEW QUESTION # 133
Which target database option in OCI is the most suitable for migrating a large, mission-critical Oracle Database 19c Enterprise Edition that utilizes advanced features like In-Memory Option and Database Vault, considering feature compatibility and performance needs?
- A. Exadata Cloud Service Database VM
- B. Autonomous Database Data Warehouse
- C. Database System - Virtual Machine
- D. Autonomous Database Basic
Answer: A
Explanation:
Here's why:
Feature Compatibility: Exadata Cloud Service Database VM offers the highest level of compatibility with Oracle Database Enterprise Edition, including advanced features like In-Memory Option and Database Vault.
Performance: Exadata is specifically designed for high-performance OLTP and data warehousing workloads, making it ideal for mission-critical applications.
Scalability: Exadata Cloud Service Database VM can be easily scaled up or down to meet changing performance requirements.
Managed Service: As a managed service, Exadata Cloud Service Database VM handles tasks like patching, backups, and monitoring, reducing administrative overhead and ensuring high availability.
While Autonomous Database options offer some benefits, they might not be fully compatible with all advanced features of Oracle Database Enterprise Edition, especially for highly customized environments. Additionally, Autonomous Database options might have limitations in terms of customization and control compared to Exadata Cloud Service Database VM.
NEW QUESTION # 134
When migrating an Oracle Database to a new OCI environment, what considerations should be made regarding character sets and data encoding?
- A. The source and target character sets and encodings must be identical.
- B. Character set conversion might be necessary depending on compatibility.
- C. Data encoding is irrelevant for Oracle Database migrations to OCI.
- D. Character sets and encodings are automatically converted during migration.
Answer: B
Explanation:
Here's why:
Compatibility: Different character sets and encodings can represent characters differently, leading to data corruption or display issues if not compatible.
Migration Process: Character set conversion might be required during the migration process to ensure that data is correctly interpreted and displayed on the target database.
Data Integrity: Incorrect character set or encoding can lead to data integrity issues and prevent applications from functioning correctly.
While Oracle Database offers tools and features to handle character set conversion, it's important to assess compatibility and plan accordingly to avoid data corruption and ensure a successful migration.
NEW QUESTION # 135
Which of the following target database environment features in OCI contributes MOST significantly to data security?
- A. Integration with Oracle Data Masking for sensitive data protection
- B. Automatic patching and updates in Autonomous Databases
- C. Virtual Private Cloud (VPC) for network isolation in OCI
- D. Scalability and high availability offered by Database Systems
Answer: A
Explanation:
Here's why:
Data Obfuscation: Data Masking obscures sensitive data, making it difficult for unauthorized users to access or misuse it.
Compliance: Data Masking can help organizations comply with data privacy regulations like GDPR and HIPAA.
Risk Mitigation: By protecting sensitive data, Data Masking reduces the risk of data breaches and unauthorized access.
While the other options are also important for security, they focus on different aspects:
a) Scalability and high availability: These features contribute to overall database reliability and performance, but they don't directly address data protection.
b) Automatic patching and updates: Regular patching and updates help protect the database from vulnerabilities, but they don't specifically address data protection.
c) Virtual Private Cloud (VPC) for network isolation: VPCs provide network isolation and security, but they don't directly protect the data within the database.
NEW QUESTION # 136
When configuring ZDM with Oracle Data Guard for a large database, which Data Guard configuration option is most relevant to optimize redo apply performance on the standby database?
- A. Enabling FastStart Failover on the standby database to minimize failover time.
- B. Configuring the standby database to use a smaller block size compared to the primary.
- C. Utilizing automatic redo apply gaps resolution for faster catchup after synchronization.
- D. Configuring multiple redo apply servers on the standby database for parallel processing.
Answer: D
Explanation:
Here's a breakdown of why:
Parallel redo apply: Using multiple redo apply servers allows the standby database to process redo logs in parallel, significantly improving redo apply performance. This is especially beneficial for large databases with high transaction volumes.
The other options are less relevant to optimizing redo apply performance:
A). Block size is primarily related to storage efficiency and database performance. It doesn't directly impact redo apply performance.
B). FastStart Failover is more relevant to minimizing downtime during a failover event. While it can indirectly improve performance by reducing the time the standby database is unavailable, it doesn't directly optimize redo apply performance.
C). Automatic redo apply gaps resolution is useful for handling situations where redo logs are missing or corrupted. While it can help with recovery, it doesn't directly improve redo apply performance.
NEW QUESTION # 137
What is the most likely cause of the ORA-19502 error during an RMAN migration, and how would you address it?
- A. The target database version in OCI is incompatible with the source database.
- B. The control file cannot be created on the target database due to missing archive logs.
- C. The RMAN repository database is not accessible.
- D. The RMAN configuration file is corrupt on the source system.
Answer: B
Explanation:
This error typically indicates that RMAN is unable to find the necessary archive logs to create the control file on the target database. This can happen if:
Archive logs are missing: The archive logs required for the restore might not be available on the source or target system.
Archive log retention policy: The archive log retention policy on the source database might be too restrictive, causing older archive logs to be deleted before they are needed for the restore.
RMAN configuration issues: There might be issues with the RMAN configuration on the source or target system, preventing RMAN from accessing or copying the required archive logs.
To address this issue, you should:
Verify archive log availability: Ensure that all necessary archive logs are available on the source and target systems. If any archive logs are missing, you might need to restore them from backups or re-create them.
Adjust archive log retention policy: If the archive log retention policy on the source database is too restrictive, consider increasing it to retain archive logs for a longer period.
Check RMAN configuration: Verify that the RMAN configuration on both the source and target systems is correct and that there are no issues preventing RMAN from accessing or copying archive logs.
Re-run the migration: Once you have addressed the underlying issue, you can re-run the RMAN migration and see if the ORA-19502 error is resolved
NEW QUESTION # 138
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