Free and Premium Oracle 1z0-1093-25 Dumps Questions Answers

A. Execute ADDM (Automatic Database Diagnostic Monitor) analysis on a historical workload:

Performance Hub allows users to analyze performance data collected over time.

ADDM analysis provides insights into performance bottlenecks and recommendations for tuning.

C. Identify blocking sessions that are impacting database performance:

Performance Hub helps identify active blocking sessions, enabling quick resolution of performance issues.

It provides real-time and historical data for better troubleshooting.

Why the other options are incorrect:

B. Modify database parameters:Performance Hub does not have the ability to change database configurations directly.

D. Upgrade the database:Upgrades are managed through other tools, such as Database Upgrade Assistant (DBUA).

Schema-less in NoSQL:

This means you don't need to define a rigid, fixed structure before data insertion. Each record can have its own structure, allowing flexibility for evolving data models. This is useful for unstructured or semi-structured data.

Why the other options are incorrect:

B:This describes relational databases.

C:This describes the structured nature of SQL databases.

D:While binary formats may be used, schema-less refers to the logical, not physical, structure.

Managing Exadata Infrastructure:

OCI Console and APIs (B):The primary method for managing Exadata Infrastructure is through theOracle Cloud Infrastructure Consoleand associated APIs. This includes provisioning, scaling, patching, and monitoring the Exadata environment.

Oracle-Managed Infrastructure (E):Exadata Infrastructure management is fully handled by Oracle, which means customers do not have direct access to the underlying hardware. This managed approach ensureshigh availability and security.

Why the other options are incorrect:

A:Customers do not have root access to Exadata compute nodes to ensure security and system integrity.

C:Thedbcli utilityis designed for VM DB Systems, not Exadata Infrastructure management.

D:Exadata storage cells are managed by Oracle, and customers cannot directly modify storage configurations.

Table Rate Limiting:

Table rate limiting ensures that no single table monopolizes system resources, maintainingoverall stability and performancein a multi-tenant environment. This feature is crucial for cloud services where numerous applications may share the same database infrastructure. It helps maintain fair access by capping the number of read/write operations per second.

Why the other options are incorrect:

A:ACID compliance is achieved through consistency settings, not rate limiting.

C:Schema optimization is not related to rate limiting.

D:Rate limiting controls IOPS (Input/Output Operations Per Second), not storage space.

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.

B. Automation of provisioning and management:

Cloud Tooling automates key tasks such asprovisioning, patching, scaling, and maintenance.

Reduces manual configuration errors and saves time.

Ensures consistency in setup and updates, minimizing downtime.

Greatly simplifies lifecycle management, making cloud deployments more efficient than on-premises.

Why the other options are incorrect:

A. More granular hardware control:Cloud tooling abstracts low-level hardware management.

C. No DBA intervention:While reduced, DBAs still handle application-specific configurations and performance tuning.

D. Using older database versions:Exadata Cloud Service supportsonly supported versions, not deprecated ones.

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.

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.

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. 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.

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.

Scaling HeatWave Efficiently:

TheOCI CLI or Consoleprovides a streamlined way to scale the HeatWave cluster. You can easily change theshape and node countthrough the console without significant downtime. The system handles the necessary data redistribution and configuration updates automatically.

This method minimizes disruption and is significantly faster than manual reconfiguration.

OCI’s automated scaling ensures that the cluster maintainsoptimal performancethroughout the operation.

Why the other options are incorrect:

A:Adjusting buffer size affects memory, not cluster size.

C:Changing VM shapes does not directly affect HeatWave.

D:Recreating the cluster is inefficient and time-consuming.

E:Manual export/import introduces downtime and is not efficient for scaling.

C. Using Oracle Data Guard for a switchover operation:

Aswitchoveris a planned role reversal between the primary and standby databases.

Zero data loss:Since both databases are synchronized, it minimizes downtime.

Ideal for planned maintenance:The primary database is switched to the standby, allowing maintenance on the original primary without downtime.

Data Guard Switchover:

sql

CopyEdit

ALTER DATABASE SWITCHOVER TO standby_db;

Why the other options are incorrect:

A. Full backup with RMAN:Backup does not ensure availability during maintenance.

B. In-place upgrade:Typically involves downtime.

D. Quarterly patch:Patching often requires database restarts, causing downtime.

E. Resizing block volume:Does not maintain availability if the database requires restarting.

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.

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.

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. 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.

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.

Database Software Upgrade:

When upgrading theOracle Database software versionon aBaseDB VM, a newOracle Homeis created to house the upgraded software. Once the database is moved to this new home, the process isnot easily reversible.

Rolling back would requiredowngrading, which is a complex and risky process.

The new Oracle Home ensures that the upgraded database environment isisolated from the previous version, preventing compatibility conflicts.

Why the other options are incorrect:

A:Grid Infrastructure upgrades can be managed independently of the database upgrade.

B:Scaling VMs is a reversible operation.

D:OS patches do not impact the Oracle Home directly.

E:ASM configuration changes are reversible.

C. Each data item is uniquely identified by a key, and the associated value can be any data type or structure.

Key-Value Data Model:

The key-value model is fundamentally based on a simple association between a unique key and its corresponding value.

The value can be a simple data type (string, number) or a complex structure (like JSON).

Oracle NoSQL Database Cloud Service uses this model to ensure efficient, scalable data access.

Why the other options are incorrect:

A. Organized into tables with schemas:This represents a relational database model.

B. Stored as JSON documents:Although NoSQL can store JSON, the fundamental model is still key-value.

D. Relationships defined through foreign keys and joins:This is typical of relational databases.

E. Graph format with nodes and edges:Represents a graph database model, not key-value.

B. Only compatible Database Versions are presented:

The provisioning process filters out incompatible combinations, presenting only database versions that match the chosen OS image.

This ensures that the database software can run properly on the selected OS.

This compatibility check prevents deployment failures and ensures system stability.

Why the other options are incorrect:

A. All Database Versions are compatible:Incorrect; some versions are OS-specific.

C. Automatic OS upgrade:OCI does not automatically upgrade the OS for compatibility.

D. Database version determines OS image:The OS image is selected independently, with the system ensuring compatibility.

Comprehensive Monitoring (C):

Database Management supportsdetailed performance monitoringfor Autonomous Databases, including metrics likeCPU usage, I/O statistics, and SQL performance data.

Data Retention Limitation (D):

Theretention period for performance dataon Autonomous Databases is typically shorter than that of manually managed databases due toautomated data management policies.

Why the other options are incorrect:

A:Database Management covers more than just CPU monitoring.

B:Monitoring does not require enabling additional features on the Autonomous Database.

Purpose of Pre-Check Utility:

Thepre-check utilityin BaseDB ensures that thedatabase environment is readyfor the upcoming patch or upgrade. It checks for:

Compatibility issueswith the existing software and configurations.

Resource availability(like CPU, memory, and storage).

Dependencies and prerequisitesneeded for a successful upgrade.By identifying potential conflicts in advance, pre-checksminimize the risk of upgrade failuresand reduce downtime.

Why the other options are incorrect:

A:Backup is a separate process.

C:Pre-check does not install or validate in a test environment.

D:Performance optimization happens post-upgrade.

E:Data migration is unrelated to the pre-check process.

B. Querying data directly from object storage without data loading:

HeatWave Lakehouse extends MySQL HeatWave by allowing direct query execution on data stored in external object storage.

Supports formats such asCSV,Parquet, andAvro.

Eliminates the need for data import, making the process faster and more efficient for large datasets.

Enhances HeatWave's capability to act as aLakehouseby unifying data warehousing and data lake functionalities.

Why the other options are incorrect:

A. GUI for database management:Not related to analytical extension.

C. Disaster recovery replication:Not related to Lakehouse functionality.

D. Built-in ETL tool:Lakehouse focuses on query capability, not ETL.

E. Separate data warehouse:HeatWave Lakehouse queries data in-place, not creating a separate warehouse.

C. Private subnet for client network:

Essential for secure access to the databases hosted on the Exadata Database Service instance.

Ensures that client connections are restricted and managed through private IPs.

E. Private subnet for database backups:

Used to securely connect to Oracle Cloud Infrastructure Object Storage for storing backups.

Enables data protection without exposing the backup traffic to the public internet.

Why the other options are incorrect:

A. Public subnet for monitoring:Not required; secure access can be configured through private subnets.

B. Service Gateway:Optional, used for connecting to Oracle services without using the public internet.

D. NAT Gateway:Not mandatory unless specific outbound connectivity is required.

B. Network Security Groups (NSGs) for traffic control:

NSGs allow customers to defineingress and egress rulesto control network traffic.

Enhances security by restricting access to only authorized IP ranges and protocols.

Applied at theVM Clusterlevel to manage connectivity efficiently.

E. Responsibility for OS and database security:

While Oracle manages the infrastructure layer, customers are responsible for securing theoperating system and databasewithin the VM Clusters.

This includes applying security patches, configuring firewalls, and implementing user access controls.

Why the other options are incorrect:

A. Host-based firewalls on Exadata Infrastructure:Oracle, not the customer, configures the infrastructure-level security.

C. Oracle managing all security:Incorrect, as customers manage VM-level security.

D. Access to hypervisor:Customers do not have hypervisor-level access for security configuration.

A. Number of HeatWave nodes:

During provisioning, users specify the number of nodes to allocate for the HeatWave analytical workload.

More nodes enable higher performance for large datasets.

B. MySQL version:

The selected version affects compatibility and available features.

Users can choose from supported versions likeMySQL 8.0.

Why the other options are incorrect:

C. Character set:Typically configured after database creation.

D. Storage size:While storage can be specified, it is not part of HeatWave-specific configuration.

E. Initial database user:Managed post-provisioning, not as part of the initial setup.

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 configuringIdentity 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.

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.