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信頼できるOracle 1z0-1093-25: Oracle Cloud Database Services 2025 Professional関連資格試験対応 -有効的なCertShiken 1z0-1093-25日本語版試験勉強法

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Oracle Cloud Database Services 2025 Professional 認定 1z0-1093-25 試験問題 (Q72-Q77):

質問 # 72
What is the MOST appropriate method for patching an Exadata Database Service infrastructure, including both database and storage servers, to maintain the latest security updates and bug fixes?

A. Utilizing the automated patching capabilities provided by the Oracle Cloud Infrastructure (OCI) console or API.
B. Only patching the database nodes and ignoring the storage servers unless a specific issue arises.
C. Manually downloading and applying patches to each individual component.
D. Relying on the default OS auto-update features to handle all necessary patching.

正解：A

解説：
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.

質問 # 73
How does HeatWave address the challenges of Online Analytical Processing (OLAP) compared to traditional row-based database systems?

A. HeatWave leverages a distributed caching mechanism to store frequently accessed data.
B. HeatWave uses a specialized indexing technique to speed up data retrieval.
C. HeatWave automatically shards the database to distribute the workload across multiple nodes.
D. HeatWave leverages AI-powered indexing to optimize the data retrieval.
E. HeatWave employs a columnar data format in memory, enabling faster scans and aggregations for complex queries.

正解：E

解説：
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.

質問 # 74
In a column-family NoSQL database, what is the purpose of a "super column"?

A. To define the primary key for the entire database.
B. To store large binary objects (BLOBs).
C. To represent a single value associated with a row key.
D. To group related columns together, providing a level of hierarchy within the column family.

正解：D

解説：
Super Columns in Column-Family Databases:
Asuper columnis a higher-level construct used incolumn-family NoSQL databases(like Apache Cassandra).
It groups related columns together under a single name, forming atwo-level hierarchywithin a column family.
* This structure is useful when storing data that naturally fits anested or hierarchical format.
* For example, a user profile might contain super columns like "Address" (with sub-columns like
"Street", "City", "ZIP") and "Contacts" (with sub-columns like "Phone", "Email").
Why the other options are incorrect:
* A:A regular column represents a single value associated with a row key.
* C:Primary keys are defined at the row level, not using super columns.
* D:While BLOBs can be stored, the primary role of a super column is togroup related columns, not store binary data.

質問 # 75
Which two of the following options are valid statements regarding the management of the operating system on a Base Database Service Virtual Machine DB System?

A. Customers have full root access to the underlying operating system of the Virtual Machine DB System, allowing for customization and installation of custom software.
B. Direct SSH access to the underlying VM is restricted, and all OS-level operations must be performed through the Web Console.
C. Oracle manages the underlying operating system patching and updates, ensuring the system remains secure and compliant.
D. Customers are responsible for the initial OS installation, but then patching is controlled entirely by Oracle.
E. Customers are responsible for the security and maintenance of the operating system, including applying necessary patches and updates.

正解：A、E

解説：
B: Full root access:
* Customers have root-level access to manage the OS, install custom software, and configure settings.
* This provides flexibility to meet specific application requirements.
D: Responsibility for OS security:
* With root access, customers must manage OS security, including updates and patches.
* Oracle provides tools to facilitate patching, but the responsibility lies with the customer.
Why the other options are incorrect:
* A. Restricted SSH access:SSH access is allowed for VM DB systems.
* C. Oracle-managed OS patching:Oracle does not automatically patch the OS; this is a customer responsibility.
* E. Initial OS installation by customers:The OS is pre-installed, but ongoing maintenance is customer- driven.

質問 # 76
Which two of the following statements are true regarding security considerations for managingExadata Cloud Infrastructure and VM Clusters?

A. Customers are responsible for configuring and maintaining the security of the operating system and database software within the VM Clusters.
B. Oracle manages all security aspects of the Exadata Infrastructure, relieving customers of any security responsibilities.
C. Customers are responsible for configuring host-based firewalls on the Exadata Infrastructure to protect against unauthorized access.
D. Customers have full access to the Exadata Infrastructure's hypervisor and can implement custom security policies.
E. Network Security Groups (NSGs) can be used to control network traffic to and from VM Clusters, enhancing security.

正解：A、E

解説：
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.

質問 # 77
......

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Karl Ross Karl Ross

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