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

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.

A. Automatically optimizing query execution plans for best performance.

Query Optimization:

Query optimization is handled by the database engine itself, not the SDK.

SDKs are primarily focused on providing an interface for data operations, not on internal query optimization.

Why the other options are typical SDK functions:

B. Constructing requests:SDKs facilitate building and sending data manipulation requests.

C. Serializing data:Converting data between application objects and database formats is a core SDK function.

D. Handling pagination:SDKs often include utilities to manage large result sets.

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.

HeatWave as a Query Accelerator:

HeatWave enhances theMySQL Database Serviceby providing anin-memory, massively parallel query accelerator. It is specifically designed to speed upanalytical (OLAP) queries, making them run significantly faster compared to using MySQL alone.

The system stores data in acolumnar formatand processes it in memory, utilizingdistributed, parallel processingto achieve high performance.

Unlike traditional MySQL setups, HeatWave canexecute complex analytical workloadsefficiently.

Why the other options are incorrect:

A:HeatWave is not a standalone database but an extension of MySQL.

C:It is optimized foranalytical workloads, not transactional.

D:It is more than just a caching layer; it actively processes queries.

E:HeatWave clusters do not split MySQL instances but enhance query processing.

VCN Requirement:

AVirtual Cloud Network (VCN)is essential for creating a BaseDB VM instance because itprovidesnetwork connectivityandIP addressing. Subnets and security rules define the access policies and network segmentation.

Without a VCN, the VM instance cannot communicate with other resources or external networks.

Why the other options are incorrect:

A:Data Guard can be configured after provisioning.

B:Backup policies are important but can be set up later.

D:Oracle GoldenGate replication is optional and not required at the time of provisioning.

A. Block Volumes provide the primary storage and are directly attached to the VM.

Block Volumes:

These are persistent, durable block storage volumes that are attached to the VM instance.

Used to store database datafiles, redo logs, and other database-related files.

Standard and most common way to provision storage for BaseDB VMs.

Why the other options are incorrect:

B. Object Storage as the default for database datafiles:Object Storage is used for backups and unstructured data, not the primary database files.

C. Local NVMe as the default:Local NVMe provides high performance but is not always the default. Block Volumes are standard.

D. File Storage is mandatory for backups:Not mandatory. Block Volumes or Object Storage can also be used.

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.

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.

Exception Handling in SDKs:

When developing applications using theOracle NoSQL Database Cloud Service SDK, it is essential to implementerror handling logic. This typically includes managing cases like:

Record Not Found:Handling situations where a queried record does not exist.

Insufficient Capacity:Managing requests when throughput limits are exceeded.

Network Failures:Retrying operations or providing fallback mechanisms.The goal is to buildrobust and resilient applicationsthat gracefully handle unexpected conditions.

Why the other options are incorrect:

A:Cloud infrastructure handles hardware recovery, not the SDK.

B:While retrying may ensure consistency, it is the developer’s responsibility to implement it.

C:Performance metrics are gathered via monitoring tools, not exception handling.

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.