Oracle Updated 1z0-1093-25 Exam Questions and Answers by boris

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.

A. Block Volumes provide the primary storage and are directly attached to the VM.

Block Volumes:

These are persistent, durable block storage volumes that are attached to the VM instance.

Used to store database datafiles, redo logs, and other database-related files.

Standard and most common way to provision storage for BaseDB VMs.

Why the other options are incorrect:

B. Object Storage as the default for database datafiles:Object Storage is used for backups and unstructured data, not the primary database files.

C. Local NVMe as the default:Local NVMe provides high performance but is not always the default. Block Volumes are standard.

D. File Storage is mandatory for backups:Not mandatory. Block Volumes or Object Storage can also be used.

B. Only compatible Database Versions are presented:

The provisioning process filters out incompatible combinations, presenting only database versions that match the chosen OS image.

This ensures that the database software can run properly on the selected OS.

This compatibility check prevents deployment failures and ensures system stability.

Why the other options are incorrect:

A. All Database Versions are compatible:Incorrect; some versions are OS-specific.

C. Automatic OS upgrade:OCI does not automatically upgrade the OS for compatibility.

D. Database version determines OS image:The OS image is selected independently, with the system ensuring compatibility.

Trade-offs with NoSQL Databases:

NoSQL databases are designed toscale horizontallyby adding more nodes rather than scaling vertically by increasing hardware capacity. To achieve this scalability andhigh availability, NoSQL systems often adopt theBASE model(Basically Available, Soft state, Eventually consistent) rather than the strictACID model(Atomicity, Consistency, Isolation, Durability) typical of relational databases.

This means thatdata consistencymay be relaxed (eventual consistency) to allow faster reads and writes.

These characteristics make NoSQL suitable forlarge-scale, distributed systemsbut less ideal for applications requiringimmediate consistency, such as banking systems.

Why the other options are incorrect:

A:NoSQL does not guarantee stronger consistency than relational databases.

C:NoSQL typically does not offer superior data integrity for transactional workloads.

D:SQL-based querying is usually not available in NoSQL, as they often have their own query mechanisms.