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| Section | Objectives |
|---|---|
| Topic 1: Provisioning and Deployment | - Select workload type and deployment options - Configure networking and connectivity - Create and provision Autonomous AI Database |
| Topic 2: Security and Integration | - Integrate with Oracle Cloud services - Implement database security features - Automate administrative tasks |
| Topic 3: Administration and Operations | - Monitor database health and performance - Scale compute and storage resources - Manage users and security |
| Topic 4: Performance, Backup and Recovery | - High availability and disaster recovery - Performance tuning - Backup and restore operations |
Oracle 1Z0-931-26試験参考書を利用すれば、あなたは多くの時間を節約するだけでなく、いろいろな知識を身につけます。最も重要なのは、1Z0-931-26認定試験資格証明書を取得できるということです。また、1Z0-931-26試験参考書の合格率は高いので、1Z0-931-26試験に落ちる必要がないです。
質問 # 101
Which Autonomous Database Cloud Service ignores hints in SQL statements by default?
正解：B
解説：
Full Detailed In-Depth Explanation:
Oracle Autonomous Database offers two primary services: Autonomous Data Warehouse (ADW) and Autonomous Transaction Processing (ATP), each optimized for different workloads. SQL hints are directives embedded in SQL statements to influence the optimizer’s execution plan. However, their handling differs between the services:
Autonomous Data Warehouse (ADW): ADW is designed for analytical workloads and data warehousing, where query performance is critical. To ensure optimal execution, ADW’s optimizer relies heavily on its own statistics and algorithms, ignoring SQL hints by default. This behavior prevents user-provided hints from overriding the automated optimization strategies tailored for complex analytical queries.
Autonomous Transaction Processing (ATP): ATP targets transactional workloads (OLTP) and provides more flexibility. It does not ignore hints by default, allowing developers and DBAs to use hints to fine-tune query execution plans for specific transactional needs.
Thus, only ADW ignores hints by default, making option C the correct answer. Options A and B are incorrect because ATP does not share ADW’s default behavior, and option D incorrectly identifies ATP as the service that ignores hints.
質問 # 102
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?
正解：A
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 # 103
You see a clock icon in the Status column on the SQL Monitoring tab of Performance Hub. What does it indicate?
正解：D
解説：
The Performance Hub in Autonomous Database provides real-time SQL monitoring with status indicators:
Correct Answer (A): A clock icon in the Status column indicates “The SQL statement is queued.” This means the statement is waiting in a queue (e.g., due to resource limits or consumer group settings) and has not yet started executing.
Incorrect Options:
B: An executing statement typically shows a green progress bar or running icon, not a clock.
C: An error would display a red icon or error symbol, often with details in the UI.
D: A completed statement shows a checkmark or similar success indicator.
This visual cue helps identify resource contention or scheduling delays.
質問 # 104
Which vaults are used for storing customer-managed encryption keys for Autonomous Database on Dedicated Infrastructure?
正解：B
解説：
Autonomous Database on Dedicated Infrastructure supports customer-managed encryption (CME) keys for enhanced security control. The correct vaults are:
Oracle Key Vault, Oracle Cloud Infrastructure Vault (D):
Oracle Key Vault (OKV): A centralized key management solution designed for Oracle environments, OKV securely stores and manages encryption keys. It integrates with Autonomous Database to provide customer-managed TDE (Transparent Data Encryption) keys, offering features like key rotation and auditing. For example, a DBA might upload a master encryption key to OKV, which the database then uses to encrypt data at rest.
Oracle Cloud Infrastructure Vault (OCI Vault): OCI Vault is a general-purpose secrets management service in OCI, capable of storing encryption keys, passwords, and other sensitive data. It supports storing TDE keys for Autonomous Database, providing a cloud-native option with high availability and scalability. You might store a key in OCI Vault and link it to your database via the OCI console.
The incorrect options are:
Oracle Audit Vault, Oracle Key Vault (A): Oracle Audit Vault is for audit log management and analysis, not key storage. It doesn’t support CME for Autonomous Database.
Oracle Cloud Infrastructure Vault, Oracle Database Vault (B): Oracle Database Vault enforces access controls within the database but isn’t a key storage vault; it’s about privilege management, not key management.
Oracle Database Vault, Oracle Key Vault (C): As above, Database Vault isn’t a key storage solution, making this pairing incorrect.
Both OKV and OCI Vault offer robust security for CME, giving customers flexibility based on their infrastructure preferences (on-premises OKV vs. cloud-based OCI Vault).
質問 # 105
Which two actions can you perform with Autonomous Data Guard enabled on Autonomous Database on Shared Infrastructure? (Choose two.)
正解：C、E
解説：
Autonomous Data Guard on Shared Infrastructure enhances ADB availability with standby databases. The two correct actions are:
Switchover (C): A switchover swaps roles between the primary and standby databases in a planned manner, with no data loss (RPO = 0). You initiate this via the OCI console (e.g., “Switchover” button on the primary ADB’s Data Guard section) or API (e.g., oci db autonomous-database switchover). For example, before maintenance on the primary, you switch to the standby in another region (e.g., from us-ashburn-1 to us-phoenix-1), taking ~2 minutes (RTO ≈ 2 min). This ensures continuity without downtime, as the standby becomes primary seamlessly.
Failover (D): A failover promotes the standby to primary during an unplanned outage (e.g., primary region failure), also with RPO = 0 due to synchronous replication. Trigger it via the OCI console (e.g., “Failover” on the standby) or API (e.g., oci db autonomous-database failover). For instance, if us-ashburn-1 crashes, the standby in us-phoenix-1 takes over in ~2 minutes, preserving all committed transactions. It’s automatic in some cases (e.g., severe failure), but manual initiation is supported too.
The incorrect options are:
View Apply Lag (A): While relevant in traditional Data Guard (measuring replication delay), Autonomous Data Guard on shared ADB uses synchronous replication (zero lag), and apply lag isn’t a user-actionable metric exposed in the UI—monitoring focuses on role status, not lag.
Reinstate (B): Reinstatement (restoring a failed primary as a standby) isn’t a user action in shared infrastructure. Oracle manages post-failover recovery, and users can’t manually reinstate; a new standby might be provisioned instead.
Change Protection Mode (E): Traditional Data Guard offers modes (e.g., Maximum Availability), but in Autonomous Data Guard on shared infrastructure, the mode is fixed (synchronous, akin to Maximum Availability), and users can’t modify it—control is limited to switchover/failover.
These actions ensure high availability with user-initiated role changes.
質問 # 106
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