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Oracle Cloud Database Services 2025 Professional Sample Questions (Q23-Q28):

NEW QUESTION # 23
You are tasked with checking the status of the Exadata Database Service (ExaDB) components using the dcli utility. You need to gather information about the health and status of the database servers and storage cells across the ExaDB infrastructure. Which dcli command, combined with appropriate commands run across the nodes, will provide the most comprehensive overview?

A. dcli -g cell_group "list cell attributes name, status, metriccurrent"
B. dcli -g cell_group "list cell attributes name, status" combined with dcli -g dbnodes "srvctl status database -d dbname"
C. dcli -g all "list status"
D. dcli -g dbnodes "list dbnodes"

Answer: B

Explanation:
A: dcli -g cell_group "list cell attributes name, status" combined with dcli -g dbnodes "srvctl status database -d dbname" dcli Utility:
* dcli(Distributed Command Line Interface) allows you to run commands on multiple nodes simultaneously.
* cell_group: A group configuration file listing all storage cells.
* dbnodes: A group configuration file listing all database nodes.
Commands Explanation:
* dcli -g cell_group "list cell attributes name, status":
* Retrieves the name and current status of each storage cell.
* dcli -g dbnodes "srvctl status database -d dbname":
* Checks the status of the database instances on the compute nodes.
* Combining these commands provides a complete picture of both storage and compute components.
Why the other options are incorrect:
* B. Including metriccurrent:Produces excessive output, not suitable for a quick health check.
* C. Listing dbnodes only:Insufficient as it lacks storage cell status.
* D. dcli -g all "list status":Invalid syntax and lacks specificity.

NEW QUESTION # 24
Oracle NoSQL Database Cloud Service utilizes a key-value data model. Which of the following statements accurately describes the fundamental structure of data within this model?

A. Data is organized into tables with predefined schemas, similar to relational databases.
B. Each data item is uniquely identified by a key, and the associated value can be any data type or structure.
C. Relationships between data items are explicitly defined through foreign keys and joins.
D. Data is structured in a graph format, representing entities as nodes and relationships as edges.
E. Data is stored as JSON documents with flexible structures, allowing for nested elements.

Answer: B

Explanation:
C: Each data item is uniquely identified by a key, and the associated value can be any data type or structure.
Key-Value Data Model:
* The key-value model is fundamentally based on a simple association between a unique key and its corresponding value.
* The value can be a simple data type (string, number) or a complex structure (like JSON).
* Oracle NoSQL Database Cloud Service uses this model to ensure efficient, scalable data access.
Why the other options are incorrect:
* A. Organized into tables with schemas:This represents a relational database model.
* B. Stored as JSON documents:Although NoSQL can store JSON, the fundamental model is still key- value.
* D. Relationships defined through foreign keys and joins:This is typical of relational databases.
* E. Graph format with nodes and edges:Represents a graph database model, not key-value.

NEW QUESTION # 25
You are managing an Exadata Database Service (ExaDB) and need to perform a full backup of the database to Oracle Cloud Infrastructure Object Storage using the bkup_api utility. The backup must include all datafiles and control files. Which bkup_api command will achieve this?

A. bkup_api bkup_start --full --dbname=dbname
B. bkup_api bkup_start --datafiles --controlfile --dbname=dbname
C. bkup_api bkup_start --dbname=dbname
D. bkup_api bkup_start --all --dbname=dbname

Answer: A

Explanation:
Full Backup with bkup_api:
The --full flag in thebkup_api commandensures that the backup includesall datafiles and control files. This command is essential for creating acomplete, consistent backupsuitable for recovery purposes.
* The backup is stored inOCI Object Storage, leveraging cloud scalability and redundancy.
* The --dbname parameter specifies which database to back up.
Why the other options are incorrect:
* A:This command may initiate a default backup, not a full one.
* B:Specifying files individually is less efficient than using --full.
* D:The --all option does not necessarily imply a full backup.

NEW QUESTION # 26
When using the OCI Console, which two options are configurable during the initial provisioning of a MySQL HeatWave DB system?

A. The character set for the database.
B. The name of the initial database user.
C. The MySQL version.
D. The storage size for the database.
E. The number of HeatWave nodes.

Answer: C,E

Explanation:
A: Number of HeatWave nodes:
* During provisioning, users specify the number of nodes to allocate for the HeatWave analytical workload.
* More nodes enable higher performance for large datasets.
B: MySQL version:
* The selected version affects compatibility and available features.
* Users can choose from supported versions likeMySQL 8.0.
Why the other options are incorrect:
* C. Character set:Typically configured after database creation.
* D. Storage size:While storage can be specified, it is not part of HeatWave-specific configuration.
* E. Initial database user:Managed post-provisioning, not as part of the initial setup.

NEW QUESTION # 27
You need to implement a backup and recovery strategy for your MySQL HeatWave Database System. What is the recommended method for backing up and restoring your HeatWave cluster?

A. Using the OCI Object Storage service for storing manual database dumps.
B. Using the MySQL Enterprise Backup tool directly on the HeatWave nodes.
C. Relying solely on MySQL replication to another MySQL instance.
D. Utilizing OCI Database backups, which include both the MySQL Database System and the HeatWave cluster.
E. Manually copying the data files from the HeatWave cluster's storage.

Answer: D

Explanation:
C: Utilizing OCI Database backups:
* Integrated withOracle Cloud Infrastructure (OCI), providing consistent and complete backups.
* Supports both theMySQL Database System and the HeatWave cluster, ensuring data integrity.
* Automates backup scheduling and retention policies.
* Facilitates easy restoration in case of data loss or corruption.
Why the other options are incorrect:
* A. Manual copying:Prone to errors and lacks consistency.
* B. Manual dumps to Object Storage:Labor-intensive and not automated.
* D. MySQL replication:Suitable for high availability, but not a substitute for regular backups.
* E. MySQL Enterprise Backup on nodes:Complex and not designed for HeatWave's distributed environment.

NEW QUESTION # 28
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