Free Practice Questions for Oracle 1z0-1093-25 Exam

C. MySQL Shell Upgrade Checker Utility:

The utility analyzes MySQL instances for compatibility with newer versions, such as MySQL 8.0 used by HeatWave.

It checks for:

Syntax differences

Data type mismatches

Deprecated features

The tool outputs a report highlighting issues that may impact migration to HeatWave.

Why the other options are incorrect:

A. MySQL Enterprise Monitor:Focuses on monitoring performance, not compatibility.

B. Oracle SQL Developer:Primarily used for database development, not upgrade checks.

D. Oracle Cloud Advisor:Provides cloud optimization recommendations, not MySQL compatibility checks.

E. MySQL Workbench:A visual tool for database design and administration, not specifically for upgrade assessment.

B. Using Data Guard for physical standby and switchover:

This method enablesminimal downtimemigration.

Steps:

Configure Data Guard to synchronize thestandby databasewith the primary on-premises database.

Once synchronized, perform aswitchoverto make the standby the new primary.

Downtime is limited to the switchover duration.

This approach leveragesreal-time replicationto minimize disruption.

Why the other options are incorrect:

A. Export/Import with Data Pump:Too time-consuming for large databases.

C. Full backup and restore:High downtime due to the time required for data transfer and restoration.

D. Copying via SQL Developer:Not feasible for mission-critical and large databases due to slow transfer speeds.

RCU Calculation:

Read Capacity Units (RCUs) are determined based ondata size (average record size), read frequency (number of reads per second), and consistency level (eventual vs. strong consistency). Complex security roles do not impact the calculation because they do not directly influence the amount of data read or the frequency of access.

Why the other options are correct:

A:Larger record sizes increase RCU requirements.

B:Higher read frequency demands more RCUs.

D:Strong consistency requires more read operations compared to eventual consistency.

B. Social Media Platform:

Social media applications require quick retrieval of user profiles based on unique IDs.

The key-value model supports fast lookups and simple data associations, ideal for user-centric data.

The flexibility of storing user attributes in a single document enhances performance and scalability.

Why the other options are incorrect:

A. Complex analytical queries:Relational or analytical databases are better suited.

C. Financial systems:Require ACID compliance and complex joins, not suitable for key-value models.

D. Content management:Typically requires a more structured approach, better handled by document databases.

E. ERP systems:Need relational integrity and complex schema support.

Responsibility of DBA:

Before upgrading the Oracle Database software on aBaseDB VM system, the DBA must verify that theunderlying operating system versionis compatible with the new database software version. This is crucial because Oracle Database upgrades may introduce new requirements or dependencies.

The DBA needs to check theOracle Database Upgrade Guideand theOracle Validated Configurationsto ensure compatibility. Upgrading without this validation could lead to compatibility issues, failed upgrades, or reduced performance.

Why the other options are incorrect:

A:OCI manages the infrastructure, but the DBA must ensure compatibility.

C:While OCI manages the OS patching, ensuring compatibility is still a DBA responsibility.

D:OS updates should be addressed before the database upgrade, not afterward.

A. Secure Communication Channel:

The Oracle Management Agent acts as a bridge between theDatabase Management Serviceand the database.

Enables secure data collection, monitoring, and performance analysis.

Uses encryption to protect data during transmission.

Facilitates monitoring, alerting, and management through OCI services.

Why the other options are incorrect:

B. Backup and recovery operations:These are typically handled by backup tools, not the management agent.

C. OS management:The agent does not manage the operating system itself.

D. Patching and upgrades:While it can assist, it is not specifically designed for patch management.

A. Generate recommendations for SQL plan baselines:

ADDM analyzes historical data andSQL execution plans, suggesting baseline adjustments to optimize performance.

Recommendations may includeusing an existing baselineor creating a new one.

C. Identify performance bottlenecks:

ADDM pinpoints issues related to:

I/O contention

CPU utilization

Memory bottlenecks

Locking issues

Helps DBAs understand which database components are causing slowdowns.

Why the other options are incorrect:

B. Automatically applying recommendations:ADDM only suggests actions; DBAs must manually review and implement them.

D. Creating indexes:ADDM does not create indexes automatically; it may suggest them, but implementation requires DBA action.

C. Underlying database architecture and scalability characteristics:

Thearchitecture and scalabilityof Oracle NoSQL Database Cloud Service are inherent to the platform and do not change based on the SDK.

SDKs are designed to providelanguage-specific interfacesfor data interaction but do not alter the core architecture.

Whether using Java, Python, or another SDK, the database'ssharding, replication, and consistencycharacteristics remain constant.

Why the other options are impacted:

A. Query syntax:SDKs may offer different syntax or query formats.

B. Authentication method:Varies between SDKs, e.g., API keys vs. IAM tokens.

D. Error handling:Each SDK may implement error handling differently, influencing how exceptions are processed.

A. MySQL Query Optimizer:

TheMySQL Query Optimizerdetermines whether a query can benefit from HeatWave’s in-memory, columnar processing.

If a query is deemed suitable, it is automatically offloaded to the HeatWave cluster.

This process significantly improves the execution speed of complex analytical queries.

Why the other options are incorrect:

B. HeatWave AutoPilot:Manages workload optimization but does not directly offload queries.

C. MySQL Router:Manages connection routing, not query offloading.

D. MySQL Shell:Primarily used for administrative tasks, not query optimization.

E. OCI Load Balancer:Manages network traffic distribution, unrelated to database query processing.