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Oracle Cloud Database Services 2025 Professional Sample Questions (Q38-Q43):

NEW QUESTION # 38
Which is NOT a typical function provided by a NoSQL Database Cloud Service SDK related to data operations?

A. Constructing requests to insert, update, or delete data records.
B. Serializing and deserializing data between application objects and database records.
C. Handling pagination of query results.
D. Automatically optimizing query execution plans for best performance.

Answer: D

Explanation:
A: Automatically optimizing query execution plans for best performance.
Query Optimization:
* Query optimization is handled by the database engine itself, not the SDK.
* SDKs are primarily focused on providing an interface for data operations, not on internal query optimization.
Why the other options are typical SDK functions:
* B. Constructing requests:SDKs facilitate building and sending data manipulation requests.
* C. Serializing data:Converting data between application objects and database formats is a core SDK function.
* D. Handling pagination:SDKs often include utilities to manage large result sets.

NEW QUESTION # 39
Oracle NoSQL Database Cloud Service's key-value model is well-suited for certain types of applications.
Which of the following application scenarios would most directly benefit from the key-value data model's characteristics?

A. A financial system requiring strict transactional integrity and complex relationships between accounts and transactions.
B. An application requiring complex analytical queries and joins across multiple related datasets.
C. An enterprise resource planning (ERP) system managing intricate relationships between various business entities.
D. A content management system needing to enforce a rigid schema for all documents and their metadata.
E. A social media platform needing to store and retrieve individual user profiles and their associated data quickly.

Answer: E

Explanation:
B: Social Media Platform:
* Social media applications require quick retrieval of user profiles based on unique IDs.
* The key-value model supports fast lookups and simple data associations, ideal for user-centric data.
* The flexibility of storing user attributes in a single document enhances performance and scalability.
Why the other options are incorrect:
* A. Complex analytical queries:Relational or analytical databases are better suited.
* C. Financial systems:Require ACID compliance and complex joins, not suitable for key-value models.
* D. Content management:Typically requires a more structured approach, better handled by document databases.
* E. ERP systems:Need relational integrity and complex schema support.

NEW QUESTION # 40
What is the PRIMARY benefit of using Recovery Manager (RMAN) with block change tracking enabled in a BaseDB environment for incremental backups?

A. It allows for point-in-time recovery to any SCN (System Change Number) without restoring a full backup.
B. It significantly reduces the time required for incremental backups by only backing up changed blocks.
C. It eliminates the need for full backups.
D. It automatically validates the integrity of full backups during the backup process.
E. It automatically encrypts all backups with a user-defined key.

Answer: B

Explanation:
Block Change Tracking (BCT):
Enabling BCT withRMANsignificantly speeds upincremental backupsby recording changes made to data blocks since the last backup. Instead of scanning the entire database to detect changes, RMAN consults the block change tracking fileto identify modified blocks, reducing backup time and I/O.
BCT is especially beneficial in large databases where full backups would be time-consuming and resource- intensive. Incremental backups become more efficient, makingdaily or more frequent backups feasible.
Why the other options are incorrect:
* A:Full backups are still required periodically.
* C:Encryption is separate from BCT functionality.
* D:Point-in-time recovery is facilitated by backup logs, not BCT directly.
* E:Integrity checks are performed during validation, not as part of BCT.

NEW QUESTION # 41
In the context of MySQL HeatWave, what is the purpose of the HeatWave AutoPilot feature?

A. To automatically detect and prevent security vulnerabilities in the MySQL database.
B. To automatically generate reports on MySQL performance and usage.
C. To automatically scale the number of MySQL instances based on transactional workload demands.
D. To automatically back up and restore the MySQL database to Oracle Cloud Infrastructure Object Storage.
E. To automate various aspects of HeatWave management, such as data placement, node sizing and resource allocation, and query scheduling.

Answer: E

Explanation:
C: To automate various aspects of HeatWave management, such as data placement, node sizing and resource allocation, and query scheduling.
HeatWave AutoPilot Automation:
* HeatWave AutoPilot is designed to simplify and optimize the management of HeatWave.
* It automates critical tasks like:
* Data placement:Optimizing where data is stored in the HeatWave cluster for efficient query processing.
* Node sizing and resource allocation:Dynamically adjusting the size of the HeatWave cluster and allocating resources based on workload demands.
* Query scheduling:Optimizing the execution of queries for maximum performance.
* Enhanced Performance:By automating these tasks, HeatWave AutoPilot helps to ensure optimal performance and resource utilization.
Why the other options are incorrect:
* A. Automatically detecting and preventing security vulnerabilities:This is not the primary function of HeatWave AutoPilot.
* B. Automatically scaling MySQL instances based on transactional workload:HeatWave is focused on analytical workloads, not transactional scaling.
* D. Automatically generating performance reports:While monitoring is important, this isnot the main purpose of AutoPilot.
* E. Automatically backing up to OCI Object Storage:Backup and restore are separate functions and not part of AutoPilot's core functionality.

NEW QUESTION # 42
Which two requirements must be met before you can create an Exadata Database Service VM Cluster?

A. A configured Exadata Cloud@Customer infrastructure.
B. A valid support identifier (SI) associated with the OCI account.
C. An Exadata Infrastructure resource must be created first.
D. A Virtual Cloud Network (VCN) with necessary subnets for client access and backups.
E. A configured Oracle Cloud Infrastructure (OCI) Vault and Key.

Answer: C,D

Explanation:
* B. VCN and Subnets:Exadata Database Service VM Clusters require a VCN to provide network connectivity for database instances, client access, and backups. Proper subnets are essential for this network setup.
* E. Exadata Infrastructure Resource:Before creating a VM Cluster, an Exadata Infrastructure resource must be provisioned. The VM Cluster resides within this infrastructure.
Why the other options are incorrect:
* A:OCI Vault and Key are used for encryption but not mandatory for VM Cluster creation.
* C:A valid SI is needed for support but not a technical requirement for VM cluster creation.
* D:Exadata Cloud@Customer is a separate service from Exadata Database Service.

NEW QUESTION # 43
......

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