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Oracle Cloud Database 2024 Migration Professional Sample Questions (Q26-Q31):

NEW QUESTION # 26
In a Zero Downtime Migration (ZDM) scenario using Oracle GoldenGate, how does the system ensure data consistency between the source and target databases during the initial data load phase?

A. The initial load process involves applying redo generated on the source after the data copy.
B. GoldenGate automatically validates and corrects data inconsistencies during the load process.
C. GoldenGate utilizes checksums and verification techniques to detect and resolve data discrepancies.
D. Data consistency is guaranteed by replicating the commit order of transactions from source to target.

Answer: D

Explanation:
GoldenGate ensures data consistency during the initial data load phase by replicating transactions in the same order they were committed on the source database. This ensures that the target database receives the same updates in the correct sequence, maintaining data integrity.
Here's a breakdown of why the other options are incorrect:
A). GoldenGate automatically validates and corrects data inconsistencies during the load process: While GoldenGate has mechanisms to detect inconsistencies, it doesn't automatically correct them. The primary method for ensuring consistency is by replicating transactions in the correct order.
B). The initial load process involves applying redo generated on the source after the data copy: This is true, but it's a secondary step to ensure that the target database is up-to-date with any changes that occurred on the source after the initial data copy. The primary method for ensuring consistency is still replicating transactions in the correct order.
D). GoldenGate utilizes checksums and verification techniques to detect and resolve data discrepancies: While checksums and verification techniques can be used to detect data discrepancies, they are not the primary method for ensuring consistency. The primary method is still replicating transactions in the correct order.

NEW QUESTION # 27
Which GoldenGate feature best facilitates minimizing downtime during the cutover phase when switching an application to a target database?

A. Extract Pump with Streams Capture
B. Initial Load with Ongoing Replication
C. Bi-directional Replication with Conflict Detection
D. Filtered Trails with Extract Scripts

Answer: B

Explanation:
Here's a breakdown of why:
Initial Load with Ongoing Replication: This feature allows GoldenGate to perform an initial data load to the target database while simultaneously capturing and replicating changes from the source database. This ensures that the target database is up-to-date with the source during the cutover phase, minimizing downtime.
The other options are less suitable for minimizing downtime:
B). Extract Pump with Streams Capture is primarily used for data replication between different database platforms. It doesn't directly address minimizing downtime during cutover.
C). Filtered Trails with Extract Scripts can be used to filter data based on specific criteria but doesn't directly impact downtime during cutover.
D). Bi-directional Replication with Conflict Detection is used for scenarios where changes are made to both the source and target databases. While it can help with data consistency, it doesn't specifically address minimizing downtime during cutover.

NEW QUESTION # 28
Which of the following considerations is MOST important when using source backups for secure migration?

A. Encrypting the backup file on the source system using tools like RMAN is sufficient for security.
B. The OCI Database service automatically encrypts all data during the import process.
C. You can leverage Oracle Data Redaction to anonymize sensitive data before backup.
D. Granting least privilege access to the user performing the import in OCI is essential.

Answer: D

Explanation:
Here's a breakdown of the other options:
A). The OCI Database service automatically encrypts all data during the import process. While OCI Database offers encryption options, it's not guaranteed that all data will be automatically encrypted during the import process, especially if specific encryption settings are not configured.
B). You can leverage Oracle Data Redaction to anonymize sensitive data before backup. This is a good practice, but it's not sufficient to ensure secure migration. You still need to protect the backup file and the data during the import process.
C). Encrypting the backup file on the source system using tools like RMAN is sufficient for security. This is partially correct, but it's not enough. You also need to ensure that the backup file is securely transferred to OCI and that the import process is performed by a user with appropriate permissions.

NEW QUESTION # 29
Which of the following is an advantage of Zero Downtime Migration? (Choose two)

A. Simplified database architecture
B. Elimination of downtime for critical applications
C. Reduced risk of data loss during migration
D. Improved data security

Answer: B,C

Explanation:
Zero Downtime Migration reduces the risk of data loss and eliminates downtime for critical applications, making it a preferred choice for businesses.

NEW QUESTION # 30
In the ZDM workflow, what is the role of a rollback plan during the cutover phase to the target database?

A. To re-synchronize the target database with the source if data inconsistencies are discovered.
B. To automatically revert to the source database in case of application errors on the target.
C. To facilitate a controlled roll-forward of migrated data to the target in case of issues.
D. To restore the source database to its pre-migration state if the cutover fails.

Answer: D

Explanation:
Here's a breakdown of why:
Rollback plan: A rollback plan outlines the steps necessary to restore the source database to its pre-migration state in case of a failed cutover. This ensures that the original data and configuration are preserved, allowing for a recovery process.
The other options are incorrect:
A). The rollback plan is primarily for restoring the source database, not for automatically reverting to the source in case of application errors on the target.
B). Re-synchronizing the target database with the source is typically done using the replication mechanism, not the rollback plan.
D). A controlled roll-forward would involve moving data from the source to the target, which is the opposite of a rollback.

NEW QUESTION # 31
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