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Oracle 1Z0-931-25リアル試験問題保証付き 更新された問題集
Oracle 1Z0-931-25 認定試験の出題範囲：
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質問 # 40
How can an Autonomous Database resource be provisioned without logging into the Oracle Cloud Infrastructure Console?
- A. Connecting to the cloud infrastructure console using the SSH wallet
- B. It cannot be done
- C. Using the DBCA on the database server
- D. Using the cloud infrastructure command line interface or REST API calls
正解：D
解説：
Provisioning an Autonomous Database without using the OCI Console is possible through programmatic methods. The correct answer is:
Using the cloud infrastructure command line interface or REST API calls (D): The Oracle Cloud Infrastructure Command Line Interface (OCI CLI) and REST APIs allow users to provision and manage Autonomous Database resources programmatically. This method is ideal for automation or when GUI access is not preferred. For example, the OCI CLI command oci db autonomous-database create can be used to provision a database by specifying parameters like compartment ID, database name, and workload type. Similarly, a REST API POST request to /autonomousDatabases achieves the same result.
The incorrect options are:
Using the DBCA on the database server (A): The Database Configuration Assistant (DBCA) is a tool for on-premises Oracle databases, not for cloud-based Autonomous Databases, which are fully managed by Oracle.
Connecting to the cloud infrastructure console using the SSH wallet (B): SSH wallets are for secure shell access to compute instances, not for provisioning databases or interacting with the OCI Console.
It cannot be done (C): This is false, as programmatic provisioning via CLI or API is explicitly supported.
This capability enhances automation and integration into DevOps workflows.
質問 # 41
Which can be scaled independently of the number of CPUs in an Autonomous Database?
- A. Memory
- B. Concurrency
- C. Parallelism
- D. Storage
- E. Sessions
正解：D
解説：
Autonomous Database allows independent scaling of certain resources:
Correct Answer (B): "Storage" can be scaled independently of OCPUs via the OCI Console or API, adjusting capacity (e.g., from 1 TB to 2 TB) without altering compute resources.
Incorrect Options:
A: Sessions depend on CPU and memory limits, not independently scalable.
C: Memory scales with OCPUs in a fixed ratio, not separately.
D, E: Concurrency and parallelism are tied to CPU resources and consumer group settings.
This flexibility optimizes cost and capacity management.
質問 # 42
Which two infrastructure types support deployment of Oracle Autonomous Database? (Choose two.)
- A. Dedicated Exadata Infrastructure
- B. Virtual Machines on Oracle Cloud Infrastructure
- C. Shared Exadata Infrastructure
- D. Oracle Bare Metal Servers
正解：A、C
解説：
Oracle Autonomous Database is designed to run on specific infrastructure optimized for its managed capabilities:
Correct Answer (B): Dedicated Exadata Infrastructure provides a fully dedicated Exadata system for a single tenant, offering maximum isolation, performance, and customization (e.g., maintenance scheduling).
Correct Answer (D): Shared Exadata Infrastructure allows multiple Autonomous Database instances to share Exadata resources, providing a cost-effective option for smaller workloads while retaining automation benefits.
Incorrect Options:
A: Virtual Machines (VMs) on OCI are not a supported deployment platform for Autonomous Database. It requires Exadata hardware for its self-managing features, unlike traditional OCI VMs used for manual database setups.
C: Oracle Bare Metal Servers are not used for Autonomous Database; they lack the specialized Exadata architecture needed for its autonomous operations.
These infrastructure types ensure high performance and scalability tailored to Autonomous Database's requirements.
質問 # 43
What are three methods to load data into the Autonomous Database? (Choose three.)
- A. Oracle Data Pump
- B. Oracle GoldenGate
- C. RMAN Restore
- D. Transportable Tablespace
- E. SQL*Loader
正解：A、B、E
解説：
Autonomous Database supports multiple methods for loading data, tailored to its cloud-managed nature. The three correct methods are:
Oracle Data Pump (A): Data Pump is a versatile tool for importing data into Autonomous Database. You export data from a source database (e.g., using expdp), upload the dump files to OCI Object Storage, and then use the DBMS_CLOUD package (e.g., DBMS_CLOUD.COPY_DATA) to import it. It's ideal for bulk data migration, supporting complex schemas and large datasets. For example, a DBA might export a schema from an on-premises database, upload it to a bucket, and import it into ADB with minimal downtime.
Oracle GoldenGate (C): GoldenGate enables real-time data replication from source databases (on-premises or cloud) to Autonomous Database. It's perfect for continuous data loading or synchronization, supporting both initial loads and ongoing change data capture. For instance, you could replicate transactional data from an OLTP system to ADB using GoldenGate's CDC (Change Data Capture) capabilities, ensuring near-zero latency.
SQL*Loader (E): SQL*Loader loads data from flat files (e.g., CSV, text) into Autonomous Database. You upload files to OCI Object Storage and use DBMS_CLOUD procedures (e.g., DBMS_CLOUD.LOAD_DATA) to process them. It's efficient for structured data imports, like loading a CSV of customer records, with options to handle errors and transformations.
The incorrect options are:
RMAN Restore (B): Recovery Manager (RMAN) is for backups and restores, not general data loading. While it can restore an ADB from a backup, it's not a method for loading new data into an existing instance.
Transportable Tablespace (D): This method moves tablespaces between databases by copying data files, but it's not supported in Autonomous Database due to its managed architecture, which restricts direct file-level operations.
These methods cater to different use cases: Data Pump for migrations, GoldenGate for replication, and SQL*Loader for file-based loads.
質問 # 44
What is the difference between Autonomous Data Warehouse (ADW) and Autonomous Transaction Processing (ATP) databases?
- A. Only ATP manages optimizer statistics.
- B. Only ATP supports automatic backups.
- C. Only ADW uses columnar compression by default.
- D. Only ADW supports autoscaling
正解：C
解説：
ADW and ATP are tailored for different workloads:
Correct Answer (C): "Only ADW uses columnar compression by default" is true. ADW employs Hybrid Columnar Compression (HCC) for analytics, optimizing storage and query performance, while ATP uses row-based storage for transactional workloads (though HCC can be enabled manually).
Incorrect Options:
A: Both ADW and ATP manage optimizer statistics automatically.
B: Autoscaling is supported by both ADW and ATP.
D: Automatic backups are standard for both.
This reflects their design focus: ADW for analytics, ATP for transactions.
質問 # 45
Which three operations are available for a quarterly maintenance update on Autonomous Container Database? (Choose three.)
- A. Skip patching
- B. Patch immediately
- C. Reschedule patching
- D. Apply a partial patch
- E. Reschedule and patch immediately
正解：A、C、E
解説：
Oracle Autonomous Container Database (ACD) provides specific options for managing quarterly maintenance updates to ensure minimal disruption and flexibility. The three correct operations available are:
Reschedule and patch immediately (B): This option allows users to adjust the maintenance window to a more convenient time and apply the patch right away within that rescheduled window. It's useful when the default schedule conflicts with business operations but immediate patching is still desired.
Reschedule patching (C): This option enables users to defer the patching to a later maintenance window that suits their operational needs, providing flexibility without applying the patch immediately.
Skip patching (D): Users can choose to skip a quarterly maintenance update entirely, which is beneficial if the current database version is stable and no immediate updates are required. Oracle allows skipping up to two consecutive quarterly updates for Autonomous Container Databases on dedicated infrastructure.
The incorrect options are:
Patch immediately (A): This is not a standalone option for quarterly updates on ACDs. Patching occurs within scheduled maintenance windows, and immediate patching outside of rescheduling is not supported as a distinct choice.
Apply a partial patch (E): Oracle does not support applying partial patches during quarterly maintenance updates. Updates are delivered as complete bundles to ensure consistency and security.
This aligns with Oracle's maintenance policies for Autonomous Databases on dedicated infrastructure, where control over scheduling and skipping is provided, but partial patching is not an option.
質問 # 46
Given the steps:
Create Oracle Machine Learning User
Create Projects
Create Workspaces
Create Notebooks
Run SQL Scripts
Which two steps are out of order when working with Oracle Machine Learning?
- A. Create Projects
- B. Run SQL Scripts
- C. Create Workspaces
- D. Create Notebooks
- E. Create Oracle Machine Learning User
正解：A、C
解説：
Full Detailed In-Depth Explanation:
The correct sequence for Oracle Machine Learning (OML) is:
Create Oracle Machine Learning User: First step to enable OML access.
Create Workspaces: Containers for organizing projects.
Create Projects: Groups for related notebooks within a workspace.
Create Notebooks: Environments for coding and analysis.
Run SQL Scripts: Executed within notebooks.
In the given list, Create Projects (2) comes before Create Workspaces (3), which is reversed. Workspaces must exist before projects. Thus, C and D are out of order.
質問 # 47
Data Guard is enabled for your Autonomous Database and the Lifecycle State field for the primary database indicates that it is Stopped. Which statement is true?
- A. Standby database is terminated.
- B. Standby database is also stopped.
- C. Switchover is automatically initiated.
- D. Failover is automatically initiated.
正解：B
解説：
With Autonomous Data Guard enabled, the primary and standby databases are tightly coupled:
Correct Answer (C): "Standby database is also stopped" is true. When the primary database is stopped (e.g., via OCI Console), the standby database is also stopped to maintain consistency and alignment between the two. This ensures the standby remains a viable replica when the primary restarts.
Incorrect Options:
A: Switchover (role reversal) requires manual initiation and an active primary; it doesn't occur automatically on stop.
B: The standby is not terminated; it remains configured but stopped.
D: Failover (standby promotion) is not automatic on a planned stop; it's triggered only by primary failure.
This behavior preserves Data Guard functionality.
質問 # 48
Which set of Oracle Cloud Infrastructure metrics is available only for Autonomous Database on Dedicated Infrastructure?
- A. IOPS, Storage used by tablespace, Apply and Transport Lag
- B. Query Latency, User Calls, Execute Count
- C. Transaction Count, Running Statements, Sessions
- D. CPU Utilization, Storage Utilization
正解：A
解説：
Autonomous Database on Dedicated Infrastructure provides unique metrics due to its Exadata underpinnings:
Correct Answer (C): "IOPS, Storage used by tablespace, Apply and Transport Lag" are specific to dedicated deployments:
IOPS: Measures input/output operations per second, reflecting Exadata storage performance.
Storage used by tablespace: Tracks storage allocation at the tablespace level, unique to dedicated infrastructure's granular control.
Apply and Transport Lag: Relevant for Data Guard configurations, showing replication delays, available only in dedicated setups with standby databases.
Incorrect Options:
A: Transaction Count, Running Statements, and Sessions are general metrics available in both shared and dedicated environments.
B: CPU and Storage Utilization are standard across all Autonomous Database types.
D: Query Latency, User Calls, and Execute Count are also common metrics, not exclusive to dedicated infrastructure.
These metrics offer deeper insights into dedicated Exadata performance.
質問 # 49
Which statement is FALSE about loading data into the Autonomous Database using the Data Load card in Database Actions?
- A. Data can be loaded from a local data source
- B. Data can be loaded from a remote database using Database Links (DBLinks)
- C. You must first manually create your database credentials using DBMS_CLOUD.CREATE_CREDENTIAL before accessing your Oracle Object Storage Bucket
- D. Data can be uploaded from several cloud storage sources including S3, Azure, Google Cloud, and Oracle Object Storage
- E. Data formats supported include: text, CSV, JSON, Avro, and Parquet
正解：C
解説：
The Data Load card in Database Actions (within ADB's web interface) simplifies data loading. The false statement is:
You must first manually create your database credentials using DBMS_CLOUD.CREATE_CREDENTIAL before accessing your Oracle Object Storage Bucket (D): This is incorrect. The Data Load card automates credential management for Oracle Object Storage by leveraging the ADB instance's IAM permissions. When you select an OCI Object Storage bucket in the UI, it uses the instance's resource principal or user OCI credentials (e.g., from your signed-in OCI session), eliminating the need to manually run DBMS_CLOUD.CREATE_CREDENTIAL. For example, uploading sales.csv from a bucket via the Data Load card requires only bucket selection and file mapping-no PL/SQL credential setup. This automation enhances usability, contrasting with manual methods where CREATE_CREDENTIAL is needed (e.g., in SQL scripts).
The true statements are:
Data formats supported include: text, CSV, JSON, Avro, and Parquet (A): The Data Load card supports these formats, parsing them into tables using DBMS_CLOUD under the hood. E.g., a JSON file { "id": 1, "name": "John" } loads as rows.
Data can be loaded from a local data source (B): You can upload files directly from your local machine (e.g., a CSV on your desktop) via the browser interface, staging them temporarily for loading.
Data can be uploaded from several cloud storage sources including S3, Azure, Google Cloud, and Oracle Object Storage (C): The card supports these external cloud sources, requiring credentials (e.g., AWS keys), alongside native OCI Object Storage integration.
Data can be loaded from a remote database using Database Links (E): DBLinks allow pulling data from another Oracle database (e.g., INSERT INTO local_table SELECT * FROM remote_table@link), supported in the Data Load card.
The automation of credentials in D is a key differentiator for the UI-based Data Load feature.
質問 # 50
Which three tools can be used to monitor the usage and activities of Autonomous Database on Dedicated Infrastructure? (Choose three.)
- A. RMAN
- B. Enterprise Manager Cloud Control
- C. Performance Hub
- D. OCI Metrics
- E. Logs
正解：B、C、D
解説：
Monitoring Autonomous Database on Dedicated Infrastructure involves specific tools:
Correct Answer (C): Enterprise Manager Cloud Control provides comprehensive monitoring of OCI resources, including CPU, memory, I/O, and SQL performance for dedicated deployments.
Correct Answer (D): OCI Metrics offers detailed metrics via the OCI Monitoring service, allowing custom dashboards and alerts for key performance indicators (e.g., OCPU usage, storage).
Correct Answer (E): Performance Hub is a built-in tool in Autonomous Database for analyzing historical performance data, identifying trends, and troubleshooting issues.
Incorrect Options:
A: RMAN (Recovery Manager) is for backup and recovery, not real-time monitoring of usage or activities.
B: Logs provide diagnostic data but are not a standalone monitoring tool; they require manual analysis or integration with other tools.
These tools collectively enable proactive management and optimization.
質問 # 51
What happens with the standby database when disabling Autonomous Data Guard?
- A. The standby database is transformed into a refreshable clone
- B. The standby database is started read-only
- C. The standby database is started read-write
- D. The standby database is terminated.
正解：D
解説：
Disabling Autonomous Data Guard affects the standby database:
Correct Answer (A): "The standby database is terminated" is true. When Data Guard is disabled via the OCI Console or API, the standby database is deleted, ending its role as a replica. This is a permanent action requiring re-enablement to recreate a standby.
Incorrect Options:
B: The standby doesn't become read-write; it's removed entirely.
C: It doesn't remain read-only; termination stops all operations.
D: It's not converted to a refreshable clone; that's a separate feature.
This ensures resource cleanup when high availability is no longer needed.
質問 # 52
Which are two available options when creating an Autonomous Database? (Choose two.)
- A. Autonomous JSON Database on Dedicated Infrastructure
- B. APEX Service on Dedicated Infrastructure
- C. APEX Service on Shared Infrastructure
- D. Autonomous JSON Database on Shared Infrastructure
正解：B、D
解説：
Creating an Autonomous Database offers specific deployment options. The two correct ones are:
APEX Service on Dedicated Infrastructure (A): This option provisions an Autonomous Database on dedicated Exadata infrastructure with Oracle Application Express (APEX) pre-installed and optimized. It's ideal for APEX-based apps (e.g., custom web forms) requiring isolated resources. In the OCI console, you select "Dedicated Infrastructure" and "APEX Service" as the workload type, specifying OCPUs and storage. For example, a company might deploy an APEX app for internal reporting on a dedicated ACD, ensuring performance isolation from other tenants.
Autonomous JSON Database on Shared Infrastructure (C): This creates a schema-less, JSON-centric ADB on shared infrastructure, optimized for document storage (e.g., { "order_id": 123, "items": [...] }). It's provisioned via the OCI console under "Shared Infrastructure," selecting "JSON Database" as the workload type. For instance, a mobile app might use it to store user data, leveraging SQL/JSON queries like SELECT JSON_VALUE(doc, '$.order_id'). It's cost-effective and fully managed, sharing Exadata resources.
The incorrect options are:
APEX Service on Shared Infrastructure (B): There's no distinct "APEX Service" workload type on shared infrastructure. APEX is available within ATP or ADW on shared infra, but it's not a standalone option-you'd provision ATP and enable APEX manually, not as a dedicated "APEX Service." Autonomous JSON Database on Dedicated Infrastructure (D): JSON Database is only offered on shared infrastructure, not dedicated. Dedicated options include ATP, ADW, and APEX Service, but JSON Database leverages shared resources for simplicity and cost.
These options cater to specific app development (APEX) and NoSQL (JSON) needs.
質問 # 53
Which statement is FALSE about the Catalog tool?
- A. You can delete an entity from the Autonomous Database via the Catalog tool.
- B. You can limit the display of entities to only those with certain names, schemas, types, or applications by entering values in the Search field.
- C. Impact shows the entities that depend on the source.
- D. You can view the data definition of an entity.
正解：A
解説：
The Catalog tool in Autonomous Database provides metadata exploration:
Correct Answer (A): "You can delete an entity from the Autonomous Database via the Catalog tool" is false. The Catalog is a read-only interface for viewing database objects (tables, views, etc.) and their relationships; it does not support modification or deletion actions.
True Statements:
B: Filtering by name, schema, type, or application is a core search feature.
C: Viewing DDL (data definition language) for entities is supported.
D: The Impact tab shows dependencies, aiding change analysis.
This ensures safe metadata exploration without risking data changes.
質問 # 54
Which statement is correct about the Service Console in an Autonomous Database?
- A. You can use the Service Console to move an Autonomous Database between compartments.
- B. You can use the Service Console to manage runaway SQL statements on an Autonomous Database.
- C. You can use the Service Console to enable or disable auto-scaling of an Autonomous Database.
- D. You can use the Service Console to create manual backups of an Autonomous Database.
正解：B
解説：
Full Detailed In-Depth Explanation:
The Service Console is a database-specific management interface:
A: False. Auto-scaling is managed via the OCI Console, not the Service Console.
B: True. The Service Console allows monitoring and terminating runaway SQL statements that consume excessive resources.
C: False. Manual backups are created through OCI Console or SQL commands, not the Service Console.
D: False. Moving compartments is an OCI Console function, not a Service Console task.
質問 # 55
Which is an Autonomous Database critical event?
- A. New Maintenance Schedule
- B. Maintenance Begin
- C. Admin Password Warning
- D. Database Connection
- E. Schedule Maintenance Warning
正解：C
解説：
Critical events in Autonomous Database are those requiring immediate attention due to potential security or operational impacts:
Correct Answer (D): "Admin Password Warning" is a critical event because it indicates the admin password is nearing expiration (typically within 7 days). If not updated, it could lock out administrative access, posing a security and availability risk.
Incorrect Options:
A: "Maintenance Begin" is an operational event, not critical, as it's planned and managed by Oracle.
B: "Database Connection" is a routine activity, not an event requiring urgent action.
C: "Schedule Maintenance Warning" is informational, not critical, as it's a precursor to planned maintenance.
E: "New Maintenance Schedule" is administrative, not an immediate threat.
This ensures timely response to security-critical situations.
質問 # 56
What predefined user is created when provisioning an Autonomous Database (ADB) instance to which you connect to create other users and grant roles?
- A. ADMIN
- B. SYS
- C. SCOTT
- D. DWDEV
正解：A
解説：
When provisioning an Autonomous Database (ADB) instance, Oracle creates a default administrative user with extensive privileges. The correct user is:
ADMIN (B): The ADMIN user is automatically created during ADB provisioning and serves as the primary administrative account. It has full privileges to manage the database, including creating users, granting roles, and performing administrative tasks (e.g., scaling, backups). For example, after provisioning an ADB via the OCI console, you'd connect as ADMIN using the password you set, then run commands like: CREATE USER analyst1 IDENTIFIED BY "password"; GRANT CONNECT, RESOURCE TO analyst1;. This user is the entry point for initial configuration and ongoing management, authenticated via the client wallet for secure access (e.g., sqlplus admin/password@adb_high). The ADMIN user is distinct from traditional Oracle users like SYS because ADB's managed nature limits direct system-level access, funneling administration through ADMIN.
The incorrect options are:
SYS (A): In traditional Oracle databases, SYS is the superuser with ultimate control (e.g., owning the data dictionary). In ADB, however, SYS exists but is locked and inaccessible to customers due to the fully managed environment-Oracle manages system-level operations, and users connect as ADMIN instead.
DWDEV (C): There's no predefined DWDEV user in ADB. This might confuse with roles like DWROLE (for Data Warehouse developers), but no such user is created by default.
SCOTT (D): SCOTT is a sample user from older Oracle versions (with tables like EMP and DEPT), not created in ADB. It's irrelevant in this modern, managed context.
The ADMIN user's role ensures customers can manage ADB without needing Oracle's intervention, aligning with its autonomous design.
質問 # 57
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