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Oracle Cloud Database Services 2025 Professional Sample Questions (Q15-Q20):

NEW QUESTION # 15
In a BaseDB environment configured with automatic backups, what happens to the automatic backups when the DB system is terminated?

A. All automatic backups are retained in object storage for a period determined by the original backup retention policy.
B. The most recent automatic backup is retained, while older backups are deleted.
C. All automatic backups are immediately and permanently deleted from object storage.
D. Automatic backups are migrated to a lower-cost archive storage tier.
E. The retention of automatic backups after DB system termination is configurable during DB system creation.

Answer: A

Explanation:
Backup Retention Policy:
When aBaseDB system is terminated, automatic backups are not immediately deleted. Instead, they remain stored inOCI Object Storagefor the duration specified by thebackup retention policythat was configured at the time of database creation.
* This approach ensures that data can be recovered even after the database instance itself is terminated.
* Administrators can manually delete backups if they are no longer needed, but they arenot automatically purged.
Why the other options are incorrect:
* A:Backups are not deleted instantly upon termination.
* B:All backups are retained as per the policy, not just the most recent.
* D:No automatic migration to archive tier occurs.
* E:Backup retention settings are defined during provisioning, but not dynamically configurable after termination.

NEW QUESTION # 16
What is the primary purpose of the AutoML feature within MySQL HeatWave?

A. To automatically back up and restore the MySQL database to Oracle Cloud Infrastructure Object Storage.
B. To automatically generate data visualization to present database insights.
C. To automatically generate SQL queries based on natural language input.
D. To automatically tune the MySQL server parameters for optimal transactional performance.
E. To automate the process of building, training, and deploying machine learning models directly within the database.

Answer: E

Explanation:
AutoML in MySQL HeatWave:
TheAutoML featurein MySQL HeatWave integratesmachine learning capabilitiesdirectly within the database, allowing users to:
* Build, train, and deploy modelswithout moving data to external systems.
* Automate the entire ML pipeline, includingdata preprocessing, model selection, and hyperparameter tuning.
* This makes it easier for data engineers and analysts to performpredictive analyticswithout requiring data science expertise.
Why the other options are incorrect:
* A:AutoML does not focus on server tuning; it focuses on machine learning.
* C:Generating SQL queries from natural language is not within AutoML's scope.
* D:AutoML is unrelated to database backup.
* E:Visualization is not the primary function; it focuses on model building.

NEW QUESTION # 17
During the provisioning of an Oracle Cloud Infrastructure (OCI) Base Database Service (BaseDB) virtual machine (VM), what is the PRIMARY purpose of specifying the database name (DB Name)?

A. To determine the operating system user account used for database administration.
B. To define the hostname for the database server.
C. To select the character set for the operating system.
D. To create the initial database instance and its associated files.

Answer: D

Explanation:
Database Name (DB Name):
When provisioning aBaseDB VM, thedatabase nameis used to create the initial instance. It specifies how the database will be identified and helps in creating associated system files, such ascontrol files, redo log files, and datafiles. This name is crucial fordatabase instance managementand connectivity within the OCI environment.
The DB name becomes part of theDB System resource identifierin OCI, which is used in automation and management tasks.
Why the other options are incorrect:
* A:The hostname is specified independently during network configuration.
* B:OS user accounts are configured separately.
* D:The character set is chosen during database configuration, not based on the DB name.

NEW QUESTION # 18
When deploying Exadata Database Service, what is the PRIMARY benefit of using the "Cloud Tooling" deployment option versus manually configuring an on-premises Exadata system?

A. "Cloud Tooling" offers significantly more granular control over the underlying hardware configuration.
B. "Cloud Tooling" allows using older versions of Oracle Database that are no longer supported on- premises.
C. "Cloud Tooling" completely eliminates the need for any database administrator intervention.
D. "Cloud Tooling" automates the provisioning, patching, and lifecycle management of the Exadata infrastructure.

Answer: D

Explanation:
B: Automation of provisioning and management:
* Cloud Tooling automates key tasks such asprovisioning, patching, scaling, and maintenance.
* Reduces manual configuration errors and saves time.
* Ensures consistency in setup and updates, minimizing downtime.
* Greatly simplifies lifecycle management, making cloud deployments more efficient than on-premises.
Why the other options are incorrect:
* A. More granular hardware control:Cloud tooling abstracts low-level hardware management.
* C. No DBA intervention:While reduced, DBAs still handle application-specific configurations and performance tuning.
* D. Using older database versions:Exadata Cloud Service supportsonly supported versions, not deprecated ones.

NEW QUESTION # 19
In comparing NoSQL databases with relational databases, what constitutes a fundamental difference in their approach to data relationships?

A. NoSQL databases exclusively use foreign keys to establish relationships, similar to relational database models.
B. Relational databases offer no mechanism for defining relationships between different data sets.
C. Relational databases primarily rely on foreign keys to define relationships, while NoSQL databases often embed related data within a single document or use application-level links.
D. NoSQL databases universally lack the ability to represent relationships between data elements.

Answer: C

Explanation:
B: Relational vs. NoSQL data relationships:
* Relational Databases:Useforeign keysto establish relationships between tables, maintaining referential integrity.
* NoSQL Databases:Typically do not enforce relationships through foreign keys. Instead, they:
* Embed related datawithin a single document (common in document stores like MongoDB).
* Useapplication-level joinsto link related data (common in key-value or column-family stores).
* Graph databases (a type of NoSQL) useedgesto explicitly represent relationships between nodes.
* This difference highlights theflexibility vs. consistencytrade-off between NoSQL and relational databases.
Why the other options are incorrect:
* A. NoSQL databases lack relationships:Incorrect; they handle relationships differently.
* C. NoSQL using foreign keys exclusively:NoSQL databases generally do not enforce such relationships.
* D. Relational databases lack relationship mechanisms:Incorrect as relational databases are designed around relationships.

NEW QUESTION # 20
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