[2025年11月]更新のOracle 1z0-1093-25試験基本問題には解答が付きます
2025年最新の実際に出るOracle 1z0-1093-25試験問題集と解答
質問 # 23
Which two metrics are available for monitoring within the Performance Hub's Real-Time SQL Monitoring feature in Database Management?
- A. Database Version
- B. Physical Reads
- C. Number of CPUs on the host
- D. Average Active Sessions
正解：B、D
解説：
Performance Hub Real-Time SQL Monitoring:
ThePerformance Hubin Oracle Database Management provides detailed real-time monitoring of SQL queries, including:
* Physical Reads (A):Measures the number of physical I/O operations performed by a SQL statement.
* Average Active Sessions (B):Reflects the number of sessions actively performing database operations, giving insights into workload and bottlenecks.
These metrics help database administratorsanalyze query performanceand detect issues in real-time.
Why the other options are incorrect:
* C:Number of CPUs is a hardware metric, not part of SQL monitoring.
* D:Database version is static information, not a performance metric.
質問 # 24
What is the primary processing paradigm employed by the HeatWave query accelerator for analytical workloads?
- A. Disk-based processing
- B. Columnar processing
- C. Index-based processing
- D. Key-value pair processing
- E. Row-based processing
正解：B
解説：
HeatWave's Processing Model:
HeatWave usescolumnar in-memory processingto optimize analytical workloads. Storing data in columns rather than rows allows HeatWave toprocess large datasets efficiently, reducing the volume of data scanned and improving query performance. This is crucial for OLAP operations that involveaggregating and analyzing data.
Why the other options are incorrect:
* A:Row-based processing is typical for OLTP workloads, not analytical.
* B:HeatWave operates primarily in memory, not disk.
* D:Indexing enhances performance but is not the primary processing paradigm.
* E:Key-value processing is typical in NoSQL databases, not analytical systems.
質問 # 25
Which of the following actions would typically require the highest level of IAM permissions on a NoSQL table within Oracle NoSQL Database Cloud Service?
- A. Performing a simple read operation on a single row.
- B. Dropping the entire table.
- C. Inserting a new row into the table.
- D. Updating an existing row in the table.
正解：B
解説：
D: Dropping the entire table:
* Deleting a table is adestructive operationthat permanently removes the data.
* Requires the highest level of permissions due to the potential fordata lossand disruption.
* Usually restricted toadministrators or highly privileged users.
Why the other options are incorrect:
* A. Simple read operation:Basic permission, often granted to most users.
* B. Inserting a row:Requires write permissions, but not as critical as table deletion.
* C. Updating a row:Similar to insertion, modifies existing data but does not destroy the table.
質問 # 26
Which statement accurately describes the function of the HeatWave service in relation to a standard MySQL database?
- A. HeatWave acts as a caching layer in front of MySQL, speeding up access to frequently accessed data.
- B. HeatWave is a clustering solution, where a single MySQL instance is split into multiple parts.
- C. HeatWave provides an in-memory, massively parallel query accelerator to MySQL, improving analytical query performance.
- D. HeatWave is a standalone database system that replaces MySQL, offering enhanced security features.
- E. HeatWave is a specialized version of MySQL designed solely for transactional workloads, optimized for high concurrency.
正解：C
解説：
HeatWave as a Query Accelerator:
HeatWave enhances theMySQL Database Serviceby providing anin-memory, massively parallel query accelerator. It is specifically designed to speed upanalytical (OLAP) queries, making them run significantly faster compared to using MySQL alone.
* The system stores data in acolumnar formatand processes it in memory, utilizingdistributed, parallel processingto achieve high performance.
* Unlike traditional MySQL setups, HeatWave canexecute complex analytical workloadsefficiently.
Why the other options are incorrect:
* A:HeatWave is not a standalone database but an extension of MySQL.
* C:It is optimized foranalytical workloads, not transactional.
* D:It is more than just a caching layer; it actively processes queries.
* E:HeatWave clusters do not split MySQL instances but enhance query processing.
質問 # 27
Which two statements are accurate regarding the lifecycle management of an Exadata VM Cluster?
- A. The VM Cluster's CPU core count can be dynamically scaled up or down without requiring a reboot.
- B. The VM Cluster can be independently stopped and started without impacting the underlying Exadata Infrastructure.
- C. Patching the Exadata Infrastructure automatically patches the VM Cluster and databases.
- D. Modifying the shape of the Exadata Infrastructure automatically scales the VM Cluster resources proportionally.
- E. The VM Cluster can be terminated independently, allowing reuse of the Exadata Infrastructure for a different VM Cluster.
正解：B、E
解説：
A:Exadata VM Clusters can be managed independently from the Exadata Infrastructure. This means you can start or stop the cluster without affecting the infrastructure, which provides flexibility for maintenance and performance tuning.
E:The VM Cluster can be terminated without impacting the Exadata Infrastructure. This feature is useful when you want to reassign the infrastructure resources to a new or different cluster.
Why the other options are incorrect:
* B:While some adjustments might not need a reboot, core count scaling often requires restarting.
* C:Patching the infrastructure and the VM Cluster are separate processes.
* D:Changing the infrastructure shape does not automatically adjust VM Cluster resources. Manual reconfiguration is needed.
質問 # 28
Which statement best describes the principle of least privilege as it applies to table security management in Oracle NoSQL Database Cloud Service?
- A. Granting all users full administrative access to all tables to simplify management.
- B. Regularly backing up all tables and storing the backups in a publicly accessible location.
- C. Granting users only the minimum set of permissions required to perform their assigned tasks on specific tables.
- D. Encrypting all tables with the highest level of encryption, regardless of the sensitivity of the data.
正解：C
解説：
Principle of Least Privilege:
The principle of least privilege states that users should only be granted the minimum permissions necessary to perform their tasks. This reduces the risk of accidental or malicious actions that could compromise data integrity or security.
In the context ofOracle NoSQL Database Cloud Service, implementing this principle involves configuring Identity and Access Management (IAM) policiesto precisely define which users or groups can perform specific actions (such as read, write, delete) on particular tables. By limiting access, the system minimizes potential attack vectors and the impact of compromised accounts.
Why the other options are incorrect:
* A:Granting full administrative access violates the least privilege principle and increases security risks.
* C:Encryption is important, but it addresses data confidentiality, not access control.
* D:Backing up data is good practice, but storing backups in a publicly accessible location is insecure.
質問 # 29
What are the two primary dimensions typically governed by table rate limits in Oracle NoSQL Database Cloud Service?
- A. Read throughput and write throughput.
- B. CPU utilization and memory consumption.
- C. Number of indexes and query complexity.
- D. Storage capacity and network bandwidth.
正解：A
解説：
Rate Limiting in NoSQL:
In Oracle NoSQL Database Cloud Service, rate limiting primarily controlsread and write throughput. This means defining themaximum number of read and write operations per secondthat a table can handle.
The goal is toprevent a single table from consuming excessive resources, ensuringfair allocationand system stability.
Why the other options are incorrect:
* A:Storage capacity is managed via quotas, not rate limits.
* C:CPU and memory are related to system resources, not table operations.
* D:Indexing and query complexity are managed differently, often via query optimization.
質問 # 30
Which two statements accurately describe the relationship between Database Management and metrics collected in OCI Monitoring service?
- A. Database Management retrieves performance data exclusively from the OCI Monitoring service and does not directly query the database.
- B. Database Management relies on custom metrics uploaded to OCI Monitoring by the user in order to provide its monitoring features.
- C. Database Management directly queries the database for detailed performance data and supplements it with metrics from the OCI Monitoring service.
- D. Database Management's data collection is completely independent of the OCI Monitoring service.
正解：C、D
解説：
B:Database Management directly queries the database to gather performance data, such as SQL performance and active session history. It also integrates with OCI Monitoring for infrastructure-level metrics like CPU, memory, and storage utilization.
C:Database Management can function independently of OCI Monitoring since it has its own data collection mechanisms.
Why the other options are incorrect:
* A:Database Management does not rely solely on OCI Monitoring.
* D:It does not require custom metrics from the user.
質問 # 31
What role does the Exadata Storage Server Software play within the Exadata Database Service architecture?
- A. It acts as a load balancer distributing connections across the database instances.
- B. It manages the virtual machines hosting the database instances.
- C. It provides the operating system and management software for the database servers.
- D. It provides intelligent storage capabilities, including data filtering, compression, and encryption.
正解：D
解説：
C: Intelligent Storage Capabilities:
* The Exadata Storage Server Software enhances data processing at the storage layer.
* Key features include:
* Smart Scan:Offloads SQL processing to storage.
* Compression:Reduces data size and improves I/O efficiency.
* Encryption:Protects data at rest.
* This software significantly boosts database performance by reducing data transfer to the compute nodes.
Why the other options are incorrect:
* A. VM management:Handled by OCI infrastructure.
* B. OS and management software:Not related to Exadata Storage Server Software.
* D. Load balancing:Handled by Oracle RAC or OCI load balancers.
質問 # 32
When enabling Database Management Service for a cloud database, which of the following is typically NOT a configurable parameter specific to the Database Management Service itself?
- A. The database version.
- B. The maximum amount of storage space allocated for collected metrics.
- C. The specific metrics that are collected from the database.
- D. The frequency at which performance metrics are collected.
正解：A
解説：
D: The database version:
* Thedatabase versionis not configurable through the Database Management Service.
* The version is determined during the database instance provisioning and is independent of the management service.
* The management service can monitor and manage databases of various versions, but it does not control or alter the version itself.
Why the other options are configurable:
* A. Frequency of metric collection:Can be adjusted to balance performance and data granularity.
* B. Specific metrics collected:Can be customized based on monitoring requirements.
* C. Storage space for metrics:Some configurations allow defining the retention and storage capacity for collected data.
質問 # 33
Which statement BEST describes the primary architectural distinction between Exadata Database Service and a traditional Oracle Database deployed on virtual machines in the cloud?
- A. Exadata Database Service integrates specialized, high-performance storage servers and a high- bandwidth, low-latency RDMA over Converged Ethernet (RoCE) network, optimized for database workloads, which are not present in typical cloud VM deployments.
- B. Exadata Database Service uses a completely different SQL parsing engine compared to a traditional Oracle Database.
- C. Exadata Database Service utilizes only virtualized compute nodes, while traditional deployments use bare metal.
- D. Exadata Database Service exclusively supports Oracle RAC, while traditional cloud deployments can support both single-instance and RAC databases.
正解：A
解説：
Exadata's Unique Architecture:
Exadata Database Service is engineered specifically for Oracle Database workloads. The architecture leverages specialized storage servers that performdata-intensive operations at the storage level(such as filtering and aggregation), reducing the amount of data sent to the compute nodes.
TheRoCE network(RDMA over Converged Ethernet) provides high-bandwidth, low-latency connectivity between compute and storage nodes, significantly enhancing I/O performance. This architecture is optimized for bothOLTP and OLAP workloads, making Exadata a superior choice for performance-critical applications.
Why the other options are incorrect:
* A:Exadata combines both virtualized and bare metal compute nodes.
* C:Both Exadata and traditional cloud deployments can support Oracle RAC, but Exadata is optimized for it.
* D:Exadata uses the same Oracle Database SQL parsing engine; the difference lies in the optimized hardware.
質問 # 34
Which two are valid mechanisms for accessing OS-level metrics on a Base Database Service Virtual Machine?
- A. The only way to access OS-level metrics is through a custom monitoring agent installed directly on the VM.
- B. Access OS metrics programmatically via the OCI Monitoring APIs, which allow retrieval of metrics collected by the Oracle Cloud Agent.
- C. Utilize the vmcli utility, which allows access to OS-level metrics specific to the DB System.
- D. All OS metrics are automatically pushed to the Cloud Exadata Service Dashboard, and are not available outside of this service.
- E. Access OS metrics using the OCI Metrics Explorer within the OCI Console leveraging the Oracle Cloud Agent.
正解：B、E
解説：
B: Access OS metrics using the OCI Metrics Explorer within the OCI Console leveraging the Oracle Cloud Agent.
* OCI Metrics Explorer is part of the OCI Monitoring service.
* The Oracle Cloud Agent collects OS-level metrics and makes them available through the OCI Console.
* Users can view metrics like CPU usage, memory utilization, and disk I/O.
E: Access OS metrics programmatically via the OCI Monitoring APIs:
* The Oracle Cloud Agent collects OS metrics and exposes them via OCI Monitoring APIs.
* This approach allows for automated data retrieval and integration with external monitoring tools.
Why the other options are incorrect:
* A. vmcli utility:This is not a standard tool for accessing OS-level metrics on Base Database Service VMs.
* C. Custom monitoring agent:While possible, it is not the primary or only method. Oracle Cloud Agent is the default tool.
* D. Automatically pushed to the Cloud Exadata Service Dashboard:This statement is incorrect as OS metrics are available through OCI Monitoring.
質問 # 35
If the provisioned read capacity units (RCUs) are consistently underutilized for a NoSQL Database Cloud Service table, what is the MOST direct consequence?
- A. Improved query performance.
- B. Increased storage efficiency.
- C. Reduced data durability.
- D. Unnecessary cost expenditure.
正解：D
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 # 36
Within the context of Oracle Cloud Infrastructure (OCI) Base Database Service (BaseDB) virtual machine (VM) provisioning, which action is typically the RESPONSIBILITY of the customer?
- A. Automatically applying critical security patches to the operating system.
- B. Managing the Oracle Grid Infrastructure software stack.
- C. Ensuring the underlying hardware infrastructure remains fault-tolerant.
- D. Maintaining the OCI hypervisor software.
正解：B
解説：
B: Managing the Oracle Grid Infrastructure software stack:
* Customers are responsible for the installation, configuration, and maintenance of the Oracle Grid Infrastructure when using BaseDB VMs.
* This includes managing Oracle Clusterware and Automatic Storage Management (ASM) if applicable.
* Ensuring the Grid Infrastructure's availability and performance is part of customer-managed tasks.
Why the other options are incorrect:
* A. Hardware fault tolerance:Managed by Oracle Cloud Infrastructure.
* C. Hypervisor maintenance:Handled by Oracle as part of the OCI infrastructure.
* D. Security patching:While OCI provides tools, the responsibility for OS patching lies with the customer.
質問 # 37
How does HeatWave address the challenges of Online Analytical Processing (OLAP) compared to traditional row-based database systems?
- A. HeatWave employs a columnar data format in memory, enabling faster scans and aggregations for complex queries.
- B. HeatWave leverages AI-powered indexing to optimize the data retrieval.
- C. HeatWave leverages a distributed caching mechanism to store frequently accessed data.
- D. HeatWave automatically shards the database to distribute the workload across multiple nodes.
- E. HeatWave uses a specialized indexing technique to speed up data retrieval.
正解：A
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 # 38
Which two statements are true about the Oracle Cloud Infrastructure (OCI) Monitoring tools available for Base Database Service Virtual Machine DB Systems?
- A. Only Oracle Cloud Agent metrics can be used for metric data charting, alarming, and notifications. OS metrics can only be collected.
- B. Customer-installed monitoring agents are strictly prohibited on Base Database Service Virtual Machine DB Systems to maintain security compliance.
- C. The OCI Monitoring service allows users to define alarms based on metric thresholds, triggering notifications via OCI Notifications service.
- D. Oracle Cloud Agent collects OS, VM, and Database metrics, which are reported to the OCI Monitoring service and can be visualized via charts or dashboards.
- E. DB system performance events are only accessible via the Oracle Database Enterprise Manager interface, and these events cannot be integrated with OCI monitoring tools.
正解：C、D
解説：
Oracle Cloud Agent Capabilities (C):
The Oracle Cloud Agent collects a wide range of metrics, includingOS-level, VM, and database performance metrics. These metrics are integrated with theOCI Monitoring service, where users can view them in customizable charts and dashboards.
Alarms and Notifications (D):
The OCI Monitoring service enables users to set alarms that trigger when certain thresholds are exceeded.
Notifications are sent via theOCI Notifications service, providing proactive monitoring and alerting.
Why the other options are incorrect:
* A:Users can use custom metrics alongside Oracle Cloud Agent metrics.
* B:Customers are allowed to install additional monitoring agents if needed.
* E:Performance data can be integrated with OCI monitoring tools, not limited to Enterprise Manager.
質問 # 39
Within an IAM policy for Oracle NoSQL Database Cloud Service, what is the purpose of the "resource" element when defining table access permissions?
- A. To define the specific NoSQL table or tables to which the policy's permissions apply.
- B. To specify the IAM group that the policy applies to.
- C. To set the expiration date for the IAM policy.
- D. To determine the geographical region where the NoSQL database is located.
正解：A
解説：
B: Define specific NoSQL table permissions:
* The"resource"element specifies which Oracle NoSQL tables the IAM policy will apply to.
* It allows fine-grained access control by linking specific tables to permission statements.
* This ensures that only authorized users or groups can perform operations on specified tables.
Example IAM Policy Syntax:
{
"action": "nosql:table:read",
"resource": "ocid1.nosqltable.oc1..exampleuniqueID",
"effect": "allow"
}
Why the other options are incorrect:
* A. Specify IAM group:Groups are defined in the"subject"element, not the "resource" element.
* C. Geographical region:The region is usually part of theOCID(Oracle Cloud Identifier), not directly specified in the resource element.
* D. Set expiration date:Expiry is not defined within the "resource" element.
質問 # 40
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 --all --dbname=dbname
- B. bkup_api bkup_start --full --dbname=dbname
- C. bkup_api bkup_start --dbname=dbname
- D. bkup_api bkup_start --datafiles --controlfile --dbname=dbname
正解：B
解説：
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.
質問 # 41
You are responsible for managing the storage configuration of an Exadata Database Service (ExaDB). You need to use the cellcli utility to modify the IORM (I/O Resource Management) settings to prioritize critical database workloads. Specifically, you want to adjust the share allocation for a specific database. Which cellcli command will accomplish this?
- A. cellcli modify iormplan database dbname shares=value
- B. cellcli alter iormplan database dbname shares=value
- C. cellcli configure iormplan database dbname shares=value
- D. cellcli change iormplan database dbname shares=value
正解：B
解説：
A: cellcli alter iormplan database dbname shares=value
CellCLI Utility:
* cellcli is a command-line interface used to manage Exadata storage cells.
* Thealtercommand is used to modify existing configurations, including IORM plans.
* IORM (I/O Resource Management):
* Helps control how I/O resources are allocated among databases.
* Thesharesparameter adjusts the relative priority of I/O requests.
* Correct syntax for adjusting IORM:
bash
CopyEdit
cellcli -e "alter iormplan database dbname shares=value"
Why the other options are incorrect:
* B. configure iormplan:Used for creating or setting up new IORM plans, not for modification.
* C. modify iormplan:modify is not a valid command in CellCLI for IORM.
* D. change iormplan:No such command exists in CellCLI.
質問 # 42
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