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Oracle Cloud Database 2024 Migration Professional Sample Questions (Q51-Q56):

NEW QUESTION # 51
Which of the following activities is part of preparing a database for migration with DMS? (Select all that apply)

A. Backing up the database
B. Reducing the size of the database
C. Updating outdated indexes
D. Ensuring database compatibility

Answer: A,C,D

Explanation:
Preparing a database for migration includes ensuring compatibility, backing up the database, and updating outdated indexes. Reducing the size is not a necessary preparatory step.

NEW QUESTION # 52
When migrating a database schema only (without data) using Data Pump, which export mode is recommended for the most efficient operation?

A. Full export mode (FULL) to capture all database objects including data.
B. Schemas only export mode (SCHEMAS) to export schemas and their definitions.
C. Tables only export mode (TABLES) to extract only table definitions without data.
D. User-specified export mode (USER_SPECIFIED) to selectively export specific schema objects.

Answer: B

Explanation:
Here's a breakdown of why:
Schemas only export mode: This mode is specifically designed to export database schemas and their definitions, without including any data. It's ideal for schema-only migrations, as it avoids unnecessary data transfer and reduces the overall migration time.
The other options are less efficient or not suitable for schema-only migrations:
A). Full export mode includes data, which is unnecessary for schema-only migrations and can significantly increase the export time.
C). User-specified export mode requires you to manually specify which schema objects to export. While this can be useful for specific scenarios, it's not the most efficient way for a schema-only migration.
D). Tables only export mode is similar to schemas only export mode, but it doesn't include other schema objects like views, sequences, and indexes. For a complete schema migration, it's better to use the SCHEMAS mode

NEW QUESTION # 53
When migrating a large database to OCI using source backups, which of the following strategies can significantly reduce the migration time?

A. Restoring the database to a different compartment in OCI.
B. Creating a smaller, incremental backup before the full backup.
C. Using a parallel restore and recovery option.
D. Compressing the backup file using a high-compression algorithm.

Answer: C

Explanation:
Here's why:
Parallelism: Parallel restore and recovery allows RMAN to distribute the workload across multiple processes, significantly speeding up the restore and recovery process for large databases.
Efficiency: This strategy is particularly effective for large databases with multiple tablespaces, as RMAN can restore and recover each tablespace in parallel.
While the other options can also have some impact on migration time, they are generally less effective than using parallel restore and recovery:
B). Creating a smaller, incremental backup before the full backup. While this can reduce the size of the full backup, it doesn't directly impact the restore and recovery time.
C). Compressing the backup file using a high-compression algorithm. Compression can reduce the upload time to OCI, but it doesn't affect the restore and recovery time.
D). Restoring the database to a different compartment in OCI. Changing the compartment doesn't directly affect the migration time. It's primarily a matter of organization and security.

NEW QUESTION # 54
In Zero Downtime Migration, which of the following can be used as a target for the migrated data? (Select all that apply)

A. Oracle Cloud Infrastructure Database
B. Oracle Autonomous Database
C. On-premises Oracle Database
D. MySQL Database

Answer: A,B

Explanation:
Oracle Autonomous Database and Oracle Cloud Infrastructure Database can be targets for migrated data, as they are designed to work seamlessly with Oracle's migration solutions.

NEW QUESTION # 55
Which of the following migration methods would be the MOST appropriate for minimizing downtime during peak hours?

A. User Interface Migration through Oracle Cloud Infrastructure (OCI) Console
B. Data Pump Export/Import
C. Full Database Backup and Restore
D. GoldenGate for continuous availability

Answer: D

Explanation:
Here's why:
Continuous Replication: GoldenGate provides real-time data replication between source and target databases, ensuring minimal downtime during the migration process.
Minimal Disruption: As data is replicated continuously, there's no need for a lengthy downtime period for a full database backup and restore or for data pump export/import operations.
Flexibility: GoldenGate offers flexibility in terms of migration strategies, allowing you to choose the most suitable approach based on your specific requirements and downtime constraints.
While the other options might be suitable in certain scenarios, they are less effective at minimizing downtime during peak hours:
a) Full Database Backup and Restore: This method requires a significant downtime period, as the entire database needs to be backed up and restored.
b) Data Pump Export/Import: While Data Pump can be used for migration, it also requires downtime, especially for large databases.
d) User Interface Migration through Oracle Cloud Infrastructure (OCI) Console: This method is typically used for smaller databases and might not be suitable for large-scale migrations during peak hours.

NEW QUESTION # 56
......

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