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Oracle 1z0-1093-25日本語版試験勉強法、1z0-1093-25 PDF
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Oracle 1z0-1093-25 認定試験の出題範囲:
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>> Oracle 1z0-1093-25日本語版試験勉強法 <<
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Oracle Cloud Database Services 2025 Professional 認定 1z0-1093-25 試験問題 (Q62-Q67):
質問 # 62
If the provisioned read capacity units (RCUs) are consistently underutilized for a NoSQL Database Cloud Service table, what is the MOST direct consequence?
- A. Increased storage efficiency.
- B. Unnecessary cost expenditure.
- C. Reduced data durability.
- D. Improved query performance.
正解:B
解説:
C: Unnecessary cost expenditure:
* In Oracle NoSQL Database Cloud Service, you pay for the provisioned RCUs regardless of actual usage.
* Consistently underutilized RCUs mean that you are incurring costs without fully utilizing the allocated resources.
* Proper capacity planning is crucial to optimize costs.
* To reduce expenses, monitor utilization and adjust RCUs accordingly.
Why the other options are incorrect:
* A. Improved query performance:While having adequate RCUs prevents throttling, over-provisioning does not inherently enhance performance.
* B. Increased storage efficiency:Storage is independent of RCUs, which relate to read throughput.
* D. Reduced data durability:Durability is not impacted by underutilized read capacity.
質問 # 63
Which two functionalities are provided by the SQL Performance Analyzer (SPA) within Database Management, aiding in cloud database tuning?
- A. Analyze the execution plan of a SQL statement and suggest alternative indexing strategies.
- B. Automatically rewrite SQL queries to improve their performance.
- C. Compare the performance of SQL statements before and after a database change (e.g., upgrade, parameter change).
- D. Generate a report highlighting the performance impact of a specific database change on a set of SQL statements.
正解:C、D
解説:
B: Compare SQL performance before and after changes:
* SPA evaluates the effect of configuration changes, upgrades, or patches on SQL performance.
* Provides insights into whether a change improves or degrades query performance.
C: Generate performance impact reports:
* SPA generates reports summarizing the effects of specific changes on SQL workload performance.
* Helps DBAs make informed decisions before implementing changes in production.
Why the other options are incorrect:
* A. Automatically rewriting SQL:SPA does not modify queries; it only analyzes and compares performance.
* D. Suggesting indexing strategies:SPA evaluates performance impacts, but indexing recommendations are made by the SQL Tuning Advisor.
質問 # 64
Which two prerequisites are required before you can provision a MySQL HeatWave DB system?
- A. A configured OCI Vault with encryption keys for database security.
- B. A pre-configured MySQL database dump for initial data loading.
- C. An OCI Compute instance to act as a client for the MySQL DB system.
- D. A MySQL Enterprise Edition license.
- E. A Virtual Cloud Network (VCN) with appropriately configured subnets.
正解:D、E
解説:
VCN Requirement (B):
AVirtual Cloud Network (VCN)with appropriate subnets is essential to providenetwork connectivity and isolationfor the HeatWave DB system. It ensures secure data flow within the Oracle Cloud Infrastructure.
License Requirement (E):
Since HeatWave is anenterprise feature, it requires aMySQL Enterprise Edition license.Without this license, the HeatWave functionalities cannot be utilized.
Why the other options are incorrect:
* A:Data loading can be performed post-provisioning.
* C:While encryption can be configured, it is not a prerequisite.
* D:An OCI Compute instance may be used as a client but is not mandatory for provisioning.
質問 # 65
Which statement is FALSE regarding the relationship between provisioned throughput and workload characteristics in NoSQL Database Cloud Service?
- A. Larger average record sizes usually demand higher read and write capacity units.
- B. A write-heavy workload typically necessitates more write capacity units than a read-heavy workload.
- C. Increased frequency of table scans reduces the throughput needed.
- D. Higher query complexity generally requires higher read throughput.
正解:C
解説:
Understanding Throughput in NoSQL:
Throughput in NoSQL databases is influenced by factors likequery complexity, workload type (read/write), and record size.
* Higher query complexity (A):Complex queries involving aggregation or joins consume more read capacity.
* Write-heavy workload (B):Writes inherently require more capacity units due to data modification and consistency checks.
* Larger record sizes (D):More data per operation increases the read/write capacity needed.
Why C is incorrect:
* C:Table scans involve reading large volumes of data, which increases throughput requirements rather than reducing them. Frequent table scans can overwhelm the system, especially with large datasets.
質問 # 66
When deploying Exadata Database Service, what is the PRIMARY benefit of using the "Cloud Tooling" deployment option versus manually configuring an on-premises Exadata system?
- A. "Cloud Tooling" allows using older versions of Oracle Database that are no longer supported on- premises.
- B. "Cloud Tooling" automates the provisioning, patching, and lifecycle management of the Exadata infrastructure.
- C. "Cloud Tooling" completely eliminates the need for any database administrator intervention.
- D. "Cloud Tooling" offers significantly more granular control over the underlying hardware configuration.
正解:B
解説:
B: Automation of provisioning and management:
* Cloud Tooling automates key tasks such asprovisioning, patching, scaling, and maintenance.
* Reduces manual configuration errors and saves time.
* Ensures consistency in setup and updates, minimizing downtime.
* Greatly simplifies lifecycle management, making cloud deployments more efficient than on-premises.
Why the other options are incorrect:
* A. More granular hardware control:Cloud tooling abstracts low-level hardware management.
* C. No DBA intervention:While reduced, DBAs still handle application-specific configurations and performance tuning.
* D. Using older database versions:Exadata Cloud Service supportsonly supported versions, not deprecated ones.
質問 # 67
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