1z0-1093-25 Exam Dumps - Oracle Cloud Infrastructure Questions and Answers

Scaling Out:

Scaling out in Exadata means increasing thenumber of database server VMs and storage serversto handle a larger workload. This is achieved byadding more compute nodesand storage cells, allowing the system todistribute database processingacross multiple nodes.

This horizontal scalability is ideal for environments with fluctuating workloads or growing data volumes. It improvesquery performance and fault tolerancesince data and workload are distributed across more hardware resources.

Why the other options are incorrect:

A:Increasing CPU cores within a single VM is consideredscaling up.

C:Upgrading the database software version is unrelated to scaling.

D:Increasing RAM is also a form of scaling up, not scaling out.

B. Optimizing schema and indexes:

Efficient schema design reduces the number of read/write operations.

Proper indexing reduces the need to scan large data volumes, minimizing the number of read capacity units (RCUs) consumed.

This proactive approach helps stay within the provisioned rate limits, avoiding throttling.

Why the other options are incorrect:

A. Increasing storage capacity:Does not address the rate of operations, only storage volume.

C. Disabling encryption:Unwise due to security risks and does not significantly impact rate limits.

D. Consolidating data into one table:Likely increases the rate of operations, worsening the problem.

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).

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. 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.

C. Accessing data using the unique key:

Oracle NoSQL Database Cloud Service follows akey-value data model.

Data is accessed directly using aunique key, which is highly efficient for lookups.

The value associated with the key can be simple or complex (e.g., JSON objects).

Provides fast read and write operations.

Why the other options are incorrect:

A. SQL with joins:Typical of relational databases, not NoSQL.

B. Graph traversal:Relevant to graph databases, not key-value stores.

D. Full-text indexing:Not the primary access method in key-value databases.

E. Predefined schema:NoSQL databases generally supportschema-lessdata storage.

MySQL Slow Query Log:

TheMySQL Slow Query Logrecords queries that exceed a specified execution time threshold. It is essential for identifyinglong-running queriesthat may be causing performance bottlenecks.

OCI Logging Analytics:

By integrating the slow query log withOCI Logging Analytics, users can visualize query performance patterns, generate alerts, and identify the root cause of slow performance. This combination is powerful for detecting and addressingquery-specific issues.

Why the other options are incorrect:

A:OCI Vault is used for managing encryption keys, not query performance.

B:OCI Events track general occurrences, not detailed query performance.

D:Network latency analysis is useful but not directly related to query analysis.

E:OCI Bastion provides secure access, not performance analytics.

Primary Distinction:

The primary difference betweenBaseDB on a VMandBare Metalis how the underlying hardware is allocated:

BaseDB on VM:The infrastructure issharedamong multiple tenants, using virtualization to isolate instances.

Bare Metal Database Service:The server'sphysical hardware is dedicatedexclusively to a single tenant, offeringmaximum performance and isolation.

This exclusive access to hardware in Bare Metal allows forbetter performanceand control compared to VM-based instances.

Why the other options are incorrect:

A:Binaries are not always pre-installed in both cases; it depends on the configuration.

B:Oracle handles hypervisor configuration, not the user.

D:Both VM and Bare Metal allow multiple database homes if configured properly.

C. Intelligent Storage Capabilities:

The Exadata Storage Server Software enhances data processing at the storage layer.

Key features include:

Smart Scan:Offloads SQL processing to storage.

Compression:Reduces data size and improves I/O efficiency.

Encryption:Protects data at rest.

This software significantly boosts database performance by reducing data transfer to the compute nodes.

Why the other options are incorrect:

A. VM management:Handled by OCI infrastructure.

B. OS and management software:Not related to Exadata Storage Server Software.

D. Load balancing:Handled by Oracle RAC or OCI load balancers.