1z0-1093-25 Oracle Cloud Database Services 2025 Professional Questions and Answers

C. OCI Monitoring with HeatWave specific metrics:

OCI Monitoring collects and visualizes detailed metrics related to HeatWave cluster operations.

Key metrics include:

Data load throughput

Data load latency

Memory and CPU utilization

These metrics help identify bottlenecks during data loading, allowing for proactive performance tuning.

Integrates withOCI Alarmsto notify administrators when thresholds are breached.

Why the other options are incorrect:

A. OCI Notifications:Sends alerts but does not collect performance metrics.

B. OCI Service Connector Hub:Moves data between services but does not provide direct performance insights.

D. OCI Streaming:Used for real-time data ingestion, not specifically for HeatWave monitoring.

E. OCI Functions:Executes serverless functions, not related to HeatWave metrics.

OCI Console:

The Oracle Cloud Infrastructure Console is the primary graphical interface for creating and managingMySQL HeatWave Database Service Systems. It provides a user-friendly environment for configuring database instances and integrating HeatWave.

OCI CLI:

The OCI Command Line Interface allows for automation and scripting of database service creation. It is useful when managing multiple instances or performing bulk operations.

Why the other options are incorrect:

C:OCI Bastion Server is used for secure SSH access, not for database creation.

D:MySQL Shell is a client tool for interacting with databases, not for provisioning them.

E:OCI SQL Developer is a database management tool, not a service provisioning tool.

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.

Database Management Prerequisites:

To enable Database Management, the following are necessary:

A:The database must be running to collect metrics.

B:IAM policies must grant access to the management service.

D:The Oracle Management Agent must be configured to collect data.

However,automatic backupsare not a requirement for enabling Database Management, as the service focuses onperformance monitoring and management, not data recovery.

Why the other options are correct:

Ensuring the database is running and accessible is essential for monitoring.

Proper IAM policies are crucial for security and data access.

The Management Agent facilitates data collection.

C. Define VCN, Private Client subnet, and Private Backup subnet:

These network components are necessary to ensure secure connectivity and backup configurations.

TheVCN (Virtual Cloud Network)provides network isolation.

ThePrivate Client subnetenables secure client connections.

ThePrivate Backup subnetis required for secure access toOCI Object Storagefor backups.

E. Create Exadata Infrastructure and VM Cluster resource:

Exadata Infrastructure represents the physical hardware.

VM Cluster resource defines compute and storage resources for the databases.

Both must be set up before provisioning the actual database instance.

Why the other options are incorrect:

A. VCN and Universal Cloud Credits:Insufficient; more configuration is needed.

B. Service Backup subnet:Incorrect, it should be aPrivate Backup subnet.

D. No prerequisites:Incorrect; prerequisites include both network and infrastructure setup.

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.

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.

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.

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.

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.

A:Data disk group encryption using OCI Vault provides enhanced security for sensitive data by encrypting data stored within the Exadata storage cells.

B:During provisioning, the size of theDATA and RECO disk groupsmust be specified. The DATA disk group is used for primary database files, while the RECO disk group is used for recovery-related files.

Why the other options are incorrect:

C:CPU count is part of the compute configuration, not storage.

D:Compression and deduplication settings are managed at the database level, not during storage configuration.

E:Database name and version are part of the database configuration, not storage settings.

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. Automated Patching via OCI Console/API:

Oracle Cloud Infrastructure offers automated patching tools specifically designed for Exadata Database Service.

These tools coordinate patching across database and storage servers, ensuring consistency.

Features include rolling patching to minimize downtime.

Automation significantly reduces human error and ensures that both database and storage servers are patched efficiently.

Why the other options are incorrect:

A. Manual patching:Prone to errors and time-consuming, especially for complex Exadata environments.

C. Default OS auto-update:Insufficient for comprehensive patching of Exadata components.

D. Ignoring storage servers:Unsafe and could lead to security vulnerabilities.

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.

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.

AutoML in MySQL HeatWave:

TheAutoML featurein MySQL HeatWave integratesmachine learning capabilitiesdirectly within the database, allowing users to:

Build, train, and deploy modelswithout moving data to external systems.

Automate the entire ML pipeline, includingdata preprocessing, model selection, and hyperparameter tuning.

This makes it easier for data engineers and analysts to performpredictive analyticswithout requiring data science expertise.

Why the other options are incorrect:

A:AutoML does not focus on server tuning; it focuses on machine learning.

C:Generating SQL queries from natural language is not within AutoML’s scope.

D:AutoML is unrelated to database backup.

E:Visualization is not the primary function; it focuses on model building.

C. Defines CPU, memory, and network bandwidth:

TheCompute Shapespecifies the resources allocated to the VM.

Shapes vary in the number ofOCPUs, amount ofRAM, andnetwork performance.

Selecting an appropriate shape ensures the database has enough computational power and memory to meet workload demands.

Why the other options are incorrect:

A. Number of databases:Limited by storage and resource capacity, not the shape itself.

B. Availability domain:Chosen separately during provisioning.

D. Pre-installed software version:The shape does not determine the database version.

B. Manual patching for GI and ASM:

In auser-managed environment, the DBA is responsible for downloading and applying patches forGrid Infrastructure (GI)andAutomatic Storage Management (ASM).

These patches are distinct fromdatabase patchesand need to be applied using tools likeopatchorOracle Universal Installer (OUI).

The process involves:

Downloading the patch from Oracle Support.

Staging the patch on the server.

Applying the patch using the appropriate commands.

Why the other options are incorrect:

A. Fully automated by OCI:OCI does not automatically patch GI and ASM in user-managed environments.

C. Integrated with database patching:GI and ASM patching is handled separately.

D. Required only during OS upgrade:Incorrect, as patching is required independently for security and stability.

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.

C. Utilizing OCI Database backups:

Integrated withOracle Cloud Infrastructure (OCI), providing consistent and complete backups.

Supports both theMySQL Database System and the HeatWave cluster, ensuring data integrity.

Automates backup scheduling and retention policies.

Facilitates easy restoration in case of data loss or corruption.

Why the other options are incorrect:

A. Manual copying:Prone to errors and lacks consistency.

B. Manual dumps to Object Storage:Labor-intensive and not automated.

D. MySQL replication:Suitable for high availability, but not a substitute for regular backups.

E. MySQL Enterprise Backup on nodes:Complex and not designed for HeatWave's distributed environment.

B. Recommendations for parameter tuning:

Database Management analyzes historical performance data and provides tuning recommendations.

These recommendations align with Oracle best practices to optimize database performance.

C. Comparison of parameter settings:

The service allows users to compare parameter configurations between different databases or across time points for a single database.

This is useful for identifying changes or discrepancies that could impact performance.

Why the other options are incorrect:

A. Automatic correction of parameters:Database Management does not automatically correct parameters; changes require manual intervention.

D. Lack of parameter management:Incorrect statement, as the service does offer parameter management features.

Exadata Smart Scan:

This technology is a core feature of Exadata storage servers. It allows the storage servers to perform data filtering, projection, and other processing tasks directly within the storage tier before sending the results to the database compute nodes. This significantly reduces the amount of data transferred over the network, leading to improved query performance.

Why the other options are incorrect:

A. Oracle Data Guard:Used for disaster recovery and high availability, not for in-storage processing.

C. Oracle Active Data Guard:Allows read-only access to a standby database, but doesn’t provide in-storage processing.

D. Exadata Smart Flash Cache:Used for caching frequently accessed data in flash memory to improve I/O performance. While it enhances performance, it does not provide intelligent data offloading and processing within the storage tier.

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.

Detailed Flash Cache Monitoring:

The commandexadcli list metricdetail -cell -metricname "flashcache.*"provides acomprehensive overviewof all metrics related toSmart Flash Cache. This includes bothread and write operations, hit ratios, and IOPS statistics.

Themetricdetailoption retrieves in-depth data, crucial for performance troubleshooting.

Theflashcache.*wildcard captures all relevant metrics associated with the Flash Cache subsystem.

Why the other options are incorrect:

A:Limited to current IOPS and throughput, not specifically flash cache.

C:Too broad, as it includes general cell metrics.

D:Focuses only on historical read/write IOPS, not comprehensive.

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.

C. OCI Object Storage:

The primary storage service for database backups within OCI.

Offers high durability, availability, and scalability.

Integrated with Oracle's automated backup solutions for BaseDB.

Suitable for both short-term and long-term storage of database backups.

Why the other options are incorrect:

A. OCI Block Volume:Used for primary database storage, not long-term backups.

B. OCI File Storage:Typically used for file system-based workloads, not for database backups.

D. OCI Archive Storage:Suitable for long-term archival but not the primary backup destination.

E. OCI Data Transfer Service:Used for bulk data migration into OCI, not for backup storage.