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1z0-1093-25熱門認證 - 1z0-1093-25資訊

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Oracle 1z0-1093-25 考試大綱：

主題
簡介

主題 1

• NoSQL Database Service Technical Overview: This section of the exam measures the skills of a NoSQL Developer and explores Oracle’s NoSQL Database Service. It includes understanding the basics of NoSQL architecture, handling table-level security, rate limiting, and data modeling. It also covers concepts like provisioned throughput and the usage of language SDKs for interacting with NoSQL services on Oracle Cloud.

主題 2

• Oracle Cloud Infrastructure Database Management Service: This section of the exam measures the skills of a Cloud Operations Analyst and provides insight into Oracle’s Database Management Service on OCI. It focuses on enabling the service for databases, monitoring their performance, and performing diagnostic and tuning activities. It also covers tasks related to the administration of databases running on Oracle Cloud Infrastructure.

主題 3

• Base Database Service - VM (BaseDB): This section of the exam measures the skills of a Cloud Database Administrator and covers the foundational elements of Oracle’s Base Database Service. It includes understanding what the BaseDB service is, how to provision and manage it, and lifecycle operations such as backups, recovery, patching, and upgrades. It also tests familiarity with monitoring and management interfaces used to control and observe the BaseDB environment.

主題 4

• Exadata Database Service (ExaDB): This section of the exam measures the skills of a Database Infrastructure Engineer and focuses on the advanced Exadata Database Service. It includes the provisioning of Exadata systems, management of Exadata Cloud Infrastructure, and VM Cluster administration. It also evaluates knowledge of lifecycle management tasks and how to interact with various Exadata management utilities and interfaces.

主題 5

• MySQL HeatWave Technical Overview: This section of the exam measures the skills of a MySQL Cloud Specialist and introduces MySQL HeatWave, Oracle’s high-performance analytics engine for MySQL. It includes provisioning, migrating existing MySQL databases to HeatWave, and working with its analytical and machine-learning capabilities. It also covers day-to-day operational activities within the MySQL HeatWave environment.

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1z0-1093-25資訊 & 1z0-1093-25考試大綱

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最新的 Oracle Cloud 1z0-1093-25 免費考試真題 (Q86-Q91):

問題 #86
Which of the following characteristics is most indicative of a NoSQL database's focus on scalability and availability over strict consistency?

• A. Reliance on a centralized, single-instance architecture.
• B. Partitioning and replication of data across multiple nodes.
• C. Enforcement of strict referential integrity constraints.
• D. Support for complex joins and transactions across multiple tables.

答案：B

解題說明：
C: Partitioning and replication of data across multiple nodes:
* NoSQL databases typically prioritizehorizontal scalabilityby distributing data across multiple nodes.
* Replicationensures data availability even if one node fails.
* This approach leads toeventual consistencyrather than strict ACID compliance.
* The system can continue to operate despite some nodes being offline, maintaining high availability.
Why the other options are incorrect:
* A. Complex joins and transactions:Typical of relational databases prioritizing consistency.
* B. Strict referential integrity:More common in SQL databases requiring ACID transactions.
* D. Centralized architecture:Opposite of scalable, distributed NoSQL models.

問題 #87
Which statement accurately describes the inherent trade-offs often associated with choosing a NoSQL database over a traditional relational database?

• A. NoSQL databases typically sacrifice strict data consistency (ACID) to gain horizontal scalability and higher availability.
• B. NoSQL databases provide simplified querying capabilities using standard SQL, enhancing developer productivity and reducing the learning curve.
• C. NoSQL databases universally guarantee stronger data consistency than relational databases, but at the expense of increased operational complexity.
• D. NoSQL databases offer superior data integrity and reduced operational overhead compared to relational databases, making them ideal for transactional systems.

答案：A

解題說明：
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.

問題 #88
What primary security mechanism within Oracle NoSQL Database Cloud Service governs access to individual tables, dictating which users or groups can perform specific actions?

• A. Database Vault
• B. Identity and Access Management (IAM) policies
• C. Virtual Cloud Network (VCN) security lists
• D. Transparent Data Encryption (TDE)

答案：B

解題說明：
IAM Policies:
Oracle NoSQL Database Cloud Service usesOCI IAM policiesto control access to tables. These policies specify who (user or group) can perform what actions (read, write, delete) on specific database resources. This centralized approach allows for granular permission control, supporting the principle ofleast privilege.
IAM policies are configured at theOCI tenancy leveland can be customized to define access based onusers, groups, and dynamic groups. They are essential for maintaining secure data access, especially in multi- tenant environments.
Why the other options are incorrect:
* A:VCN security lists control network traffic, not table-level access.
* C:Database Vault is for fine-grained access control within traditional Oracle Databases, not NoSQL.
* D:TDE handles data encryption, not access management.

問題 #89
Which of the following is a TRUE statement regarding the storage options typically available when launching an Oracle Cloud Infrastructure (OCI) Base Database Service (BaseDB) virtual machine (VM)?

• A. Local NVMe storage is always the default for BaseDB.
• B. File Storage is mandatory for database backups.
• C. Block Volumes provide the primary storage and are directly attached to the VM.
• D. Object Storage is the default storage option for database datafiles.

答案：C

解題說明：
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.

問題 #90
When provisioning a new BaseDB VM, which statement BEST describes the relationship between the available Database Versions and the selected Operating System image?

• A. The Database Version determines the Operating System image that will be used, irrespective of the initially selected image.
• B. Only Database Versions compatible with the underlying Operating System image are presented as options during provisioning.
• C. The chosen Operating System image is automatically upgraded to the latest version compatible with the selected Database Version after provisioning.
• D. All Database Versions are compatible with all Operating System images available in the OCI Marketplace.

答案：B

解題說明：
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.

問題 #91
......

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