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Oracle 1z0-1093-25 認定試験の出題範囲:
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Oracle Cloud Database Services 2025 Professional 認定 1z0-1093-25 試験問題 (Q90-Q95):
質問 # 90
What is the MOST effective method to minimize the recovery time objective (RTO) for a BaseDB database in the event of a complete DB system failure, assuming both cost and complexity are important considerations?
正解:C
解説:
C: Using Oracle Data Guard with asynchronous replication to a different availability domain within the same region.
Asynchronous Replication:
* Minimizes performance impact while ensuring data protection.
* Placing standby in the same region reduces latency and cost.
* Fast switchover reduces RTO.
Why the other options are less effective:
* A. Full backups:Time-consuming for recovery.
* B. Synchronous to a remote region:Increases latency and cost.
* D. Incremental backups:Slower recovery process.
* E. Custom script:Complex and less reliable than Data Guard.
質問 # 91
How does HeatWave address the challenges of Online Analytical Processing (OLAP) compared to traditional row-based database systems?
正解:E
解説:
HeatWave's Columnar Processing:
HeatWave improves OLAP performance by storing data in acolumnar formatin memory. This format is particularly efficient foranalytical queriesbecause:
* It minimizes the amount of data read by only scanning thenecessary columns.
* Columnar storage supportsvectorized processing, which significantly speeds up aggregation operations.
* Beingin-memory, it eliminates disk I/O bottlenecks, crucial for high-speed analytics.
Why the other options are incorrect:
* A:Indexing is useful, but columnar storage is the primary driver of speed.
* C:Caching improves access times but does not address the fundamental OLAP challenge of processing large datasets.
* D:HeatWave distributes workload usingparallel processing, not simple sharding.
* E:AI-powered indexing is not a core feature of HeatWave.
質問 # 92
Which of the following statements accurately describes the recommended procedure for patching Grid Infrastructure in a BaseDB VM system where the database is NOT managed by Oracle Cloud Infrastructure (OCI)?
正解:D
解説:
Recommended Patching Order:
In Oracle environments, it is crucial to patchGrid Infrastructure (GI) firstbecause GI components are responsible formanaging cluster resources and storage. Applying GI patches before database patches ensures that the underlying infrastructure is compatible and stable.
* After the GI patching,validatethe environment to ensure all components are functioningcorrectly before proceeding with database software updates.
* This order minimizes the risk ofdowntime or compatibility issues.
Why the other options are incorrect:
* A:OCI does not automatically handle manual patching in non-managed DB systems.
* B:Applying the database patch first may result in compatibility problems.
* D:Users can manually patch Grid Infrastructure in BaseDB VMs.
質問 # 93
When a new security patch is released for the Oracle Database software on a BaseDB VM system, what is the recommended approach for applying it in a production environment?
正解:D
解説:
B: Testing patches in a non-production environment:
* Critical to ensure that the patch does not introduce performance issues or compatibility problems.
* Best Practice:Apply the patch to astaging environmentthat mirrors production, validate stability, and then proceed to production.
* Minimizes the risk of unplanned downtime or disruptions.
Why the other options are incorrect:
* A. Immediate application in production:Risky as untested patches might cause outages.
* C. Automatic patching by OCI:OCI does not automatically apply database patches; the customer must manage this.
* D. Patching the standby and failing over:While a good strategy when applicable, it still requires prior testing.
質問 # 94
Which two requirements must be met first to create an Exadata Database Service Instance?
正解:A、C
解説:
C: Define VCN, Private Client subnet, and Private Backup subnet:
* These network components are necessary to ensure secure connectivity and backup configurations.
* TheVCN (Virtual Cloud Network)provides network isolation.
* ThePrivate Client subnetenables secure client connections.
* ThePrivate Backup subnetis required for secure access toOCI Object Storagefor backups.
E: Create Exadata Infrastructure and VM Cluster resource:
* Exadata Infrastructure represents the physical hardware.
* VM Cluster resource defines compute and storage resources for the databases.
* Both must be set up before provisioning the actual database instance.
Why the other options are incorrect:
* A. VCN and Universal Cloud Credits:Insufficient; more configuration is needed.
* B. Service Backup subnet:Incorrect, it should be aPrivate Backup subnet.
* D. No prerequisites:Incorrect; prerequisites include both network and infrastructure setup.
質問 # 95
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Head office:
Farmview Supermarket, (Level -5), Farmgate, Dhaka-1215
Corporate office:
18, Indira Road, Farmgate, Dhaka-1215
Branch Office:
109, Orchid Plaza-2, Green Road, Dhaka-1215