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Oracle 1Z0-1072-25 認定試験の出題範囲：
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質問 # 14
Which statement is TRUE about restoring a volume from a block volume backup in the Oracle Cloud Infrastructure (OCI) Block Volume service?
- A. You can restore only one volume from a manual block volume backup.
- B. You can only restore a volume to the same availability domain in which the original block volume resides.
- C. You can restore a block volume backup to a larger volume size.
- D. You can restore a volume from any full volume backup but not from an incremental backup.
正解：C
解説：
Restoring a block volume from a backup in OCI provides flexibility and options for scaling and recovery:
Restoring to a Larger Volume Size: When restoring a block volume from a backup, you have the option to restore it to a volume that is larger than the original. This is particularly useful if you anticipate needing more storage capacity after the restore.
Full and Incremental Backups: OCI supports both full and incremental backups. You can restore from any backup type, which makes it possible to restore data efficiently depending on the backup strategy used.
Multiple Restores: Multiple volumes can be restored from a single backup, providing flexibility in disaster recovery scenarios.
Availability Domain: The restored volume can be created in any availability domain within the same region, not necessarily the same one where the original volume was located.
Relevant OCI Documentation:
Block Volume Service Overview
Restoring a Block Volume
These references explain the process and options available for restoring block volumes from backups.
質問 # 15
Which statement is true about File System Replication in Oracle Cloud Infrastructure (OCI)?
- A. You cannot specify a replication interval when you create the replication resource.
- B. You can replicate the data in one file system to another file system in the same region or a different region.
- C. You can replicate the data in one file system to another file system only in the same region.
- D. Only a file system that has been exported can be used as a target file system.
正解：B
解説：
File System Replication in Oracle Cloud Infrastructure (OCI) allows you to replicate data from one file system to another either within the same region or across different regions. This capability is particularly useful for disaster recovery, data protection, and global data distribution scenarios.
Cross-Region Replication: The replication feature enables you to create a copy of your file system in a different region, ensuring that your data is available even in the event of a regional failure.
Same-Region Replication: You also have the option to replicate data within the same region, which can be useful for scenarios such as high availability and local backups.
Reference:
Oracle Cloud Infrastructure Documentation: File System Replication
質問 # 16
Which statement is true about instance configurations and instance pools in OCI?
- A. You cannot reuse the same instance configuration for multiple instance pools.
- B. You can delete an instance configuration if it is associated with an instance pool.
- C. You can only delete an instance configuration if it is not associated with any instance pool.
- D. An instance pool can have multiple instance configurations associated with it.
正解：C
質問 # 17
Which statement is true about pre-authenticated requests?
- A. You cannot edit a pre-authenticated request.
- B. Pre-authenticated requests can be used to delete buckets.
- C. You need to provide your OCI credentials to the partner company.
- D. Deleting a pre-authenticated request does not revoke access.
正解：A
解説：
In Oracle Cloud Infrastructure (OCI), pre-authenticated requests (PARs) allow users to grant access to specific objects in Object Storage without requiring the recipient to have an OCI account or credentials. This feature is useful for sharing objects securely without exposing broader access.
Cannot Edit a PAR: Once a pre-authenticated request is created, you cannot edit it. If you need to change the settings, such as the expiration date or the object being shared, you must delete the existing PAR and create a new one.
Other Statements:
Deleting a PAR does indeed revoke access immediately, contradicting option B.
Providing OCI credentials (C) is not required for using PARs. The purpose of PARs is to avoid sharing credentials.
Deleting Buckets (D): PARs are designed for accessing objects, not for administrative actions like deleting buckets.
Relevant OCI Documentation:
Managing Pre-Authenticated Requests
This reference outlines the features and limitations of pre-authenticated requests, including the inability to edit them once created.
質問 # 18
How many capacity reservations would you create to meet the requirement for high availability and distribution across Availability Domains?
- A. One
- B. Four
- C. Two
- D. Three
正解：D
解説：
In Oracle Cloud Infrastructure (OCI), to ensure high availability and distribution across Availability Domains (ADs), the recommended approach is as follows:
Capacity Reservations for High Availability: To achieve high availability, especially across all three Availability Domains in a region, you should create three capacity reservations. Each reservation corresponds to one AD, ensuring that your instances or resources are evenly distributed and resilient to AD-level failures.
Why Three: This setup provides redundancy and load distribution across the ADs, meeting the high availability requirements.
Relevant OCI Documentation:
Capacity Reservations
This document outlines how to create and manage capacity reservations to meet high availability and fault tolerance requirements.
質問 # 19
Why is the OCI Inter-Region Latency dashboard useful for optimizing data transfer and backup strategies?
- A. It's designed for troubleshooting latency issues within your specific applications.
- B. It provides real-time data specific to your tenancy's workloads.
- C. It focuses solely on latency within your own tenancy.
- D. It offers a current and historical view of latency snapshots.
正解：D
解説：
The OCI Inter-Region Latency dashboard is useful for optimizing data transfer and backup strategies because it provides both current and historical views of latency snapshots between OCI regions. This information helps you understand the network performance between regions over time, allowing you to optimize the placement of resources and data transfer operations.
Optimization Use: By analyzing latency data, you can make informed decisions on where to store backups and how to efficiently transfer data across regions, potentially reducing costs and improving performance.
Reference:
Oracle Cloud Infrastructure Documentation: Inter-Region Latency Dashboard
質問 # 20
Which Oracle Cloud Infrastructure (OCI) Identity and Access Management (IAM) policy is invalid?
- A. Allow any-user to inspect users in tenancy
- B. Allow dynamic-group 'Default'/'FrontEnd' to manage instance-family in compartment Project-A
- C. Allow group 'Default'/'A-Developers' to create volumes in compartment Project-A
- D. Allow group 'Default'/'A-Admins' to manage all-resources in compartment Project-A
正解：A
解説：
In Oracle Cloud Infrastructure (OCI), Identity and Access Management (IAM) policies are used to control access to resources. The policy in option C is invalid because "any-user" is not a valid principal in OCI IAM policies. OCI policies can only grant permissions to groups or dynamic groups, but not to arbitrary users.
Here's an explanation for each option:
A . Allow dynamic-group 'Default'/'FrontEnd' to manage instance-family in compartment Project-A: This is valid. It grants the dynamic group 'FrontEnd' the ability to manage instances within the Project-A compartment.
B . Allow group 'Default'/'A-Admins' to manage all-resources in compartment Project-A: This is valid. It provides full administrative access to all resources in the Project-A compartment for the 'A-Admins' group.
C . Allow any-user to inspect users in tenancy: This is invalid because OCI does not allow the use of "any-user" in policies. You must specify a valid group or dynamic group to define permissions.
D . Allow group 'Default'/'A-Developers' to create volumes in compartment Project-A: This is valid. It permits the 'A-Developers' group to create volumes in the Project-A compartment.
For reference:
OCI Policy Reference
質問 # 21
By default, OCI IAM policies follow the principle of least privilege. What does this principle mean in the context of policy creation?
- A. Policies should provide only the minimum set of permissions required for users to perform their tasks effectively.
- B. Policies should be written in a complex and technical manner to enhance security.
- C. Policies should be identical for all users within a tenancy.
- D. Policies should grant all possible permissions to simplify access control.
正解：A
解説：
The principle of least privilege is a security best practice that dictates that users should only be granted the minimum set of permissions necessary to perform their tasks. This principle helps to minimize the risk of accidental or malicious actions that could compromise security.
IAM Policies in OCI: When creating IAM policies in OCI, you should carefully evaluate the required permissions and only grant those that are absolutely necessary for the users or groups to perform their specific roles. This helps to reduce the attack surface and prevent unauthorized access to sensitive resources.
Reference:
Oracle Cloud Infrastructure Documentation: Identity and Access Management (IAM) Best Practices
質問 # 22
What are the two types of capture filters that can be created for network monitoring?
- A. Flow log capture filters and VTAP capture filters
- B. Flow control capture filters and traffic capture filters
- C. VTAP capture filters and network capture filters
- D. Flow log capture filters and packet capture filters
正解：A
解説：
In Oracle Cloud Infrastructure (OCI), there are two primary types of capture filters used for network monitoring:
Flow Log Capture Filters: These filters are used to capture and log network flow information (e.g., source and destination IP addresses, ports, protocols). Flow logs provide insights into the traffic patterns within your VCN.
VTAP Capture Filters: Virtual Test Access Point (VTAP) capture filters allow you to capture and inspect traffic from specific network interfaces or subnets without affecting the flow of traffic. This is particularly useful for deep packet inspection and monitoring purposes.
Reference:
Oracle Cloud Infrastructure Documentation: Flow Logs
Oracle Cloud Infrastructure Documentation: VTAP
質問 # 23
With OCI's pricing of $0.0085 USD per Gigabyte for Outbound Data Transfer in North America, how much will they spend per month for 7 Petabytes of Outbound Data Transfer?
- A. $150,000.00
- B. $0.00 (free with OCI)
- C. $59,500.00
- D. $59,415.00
正解：C
解説：
To calculate the monthly cost for 7 Petabytes (PB) of outbound data transfer at a rate of $0.0085 per GB in North America:
Calculation:
1 PB = 1,000,000 GB
7 PB = 7,000,000 GB
Cost = 7,000,000 GB * $0.0085/GB = $59,500.00
Thus, the cost for 7 PB of outbound data transfer per month is $59,500.00.
Reference:
Oracle Cloud Infrastructure Pricing: OCI Pricing
質問 # 24
What would happen if you choose not to proactively reboot the instance before the scheduled maintenance due date?
- A. You will receive another notification to reboot within the next 14 days.
- B. You will receive another notification to reboot within the next 7 days.
- C. The instance will get terminated.
- D. The instance is either reboot-migrated or rebuilt in place for you.
正解：D
解説：
In OCI, if you choose not to proactively reboot your instance before the scheduled maintenance due date, the system will handle the maintenance automatically to ensure that the instance remains operational.
Reboot-Migration or Rebuild in Place: If you don't reboot the instance yourself, OCI will automatically perform a reboot-migration or rebuild in place for the instance. This ensures that the instance is moved to new hardware or updated without your intervention, maintaining uptime and applying necessary updates or fixes.
Impact on Instance: The exact action taken (reboot-migration or rebuild in place) depends on the type of maintenance required. However, either action will temporarily interrupt the instance, typically involving a reboot, but the instance's data and configuration will be preserved.
Relevant OCI Documentation:
Instance Maintenance
OCI Maintenance Events
These references discuss the procedures and options available for handling instance maintenance in OCI.
質問 # 25
What is the primary function of the Network Path Analyzer (NPA) tool provided by Oracle Cloud Infrastructure (OCI)?
- A. Providing real-time monitoring of network traffic to detect security threats and unauthorized access attempts
- B. Optimizing network performance by dynamically adjusting routing paths based on traffic patterns
- C. Sending actual traffic between source and destination to diagnose connectivity issues
- D. Collecting and analyzing network configuration to identify virtual network configuration issues impacting connectivity
正解：D
解説：
The primary function of the Network Path Analyzer (NPA) tool in Oracle Cloud Infrastructure (OCI) is to help users troubleshoot and diagnose network connectivity issues by analyzing the network path between a source and a destination within OCI. The tool collects and analyzes the configuration of the virtual network, identifying any misconfigurations or issues that might impact connectivity.
NPA Usage: The Network Path Analyzer allows administrators to trace the network path and check for issues such as incorrect security list rules, route table misconfigurations, or any other factors that could prevent network traffic from reaching its destination.
Reference:
Oracle Cloud Infrastructure Documentation: Network Path Analyzer
質問 # 26
Which of the following is a valid RFC 1918 CIDR prefix that can be used for creating an Oracle Cloud Infrastructure (OCI) Virtual Cloud Network (VCN)?
- A. 10.0.0.0/8
- B. 192.268.0.0/24
- C. 192.168.0.0/16
- D. 0.0.0.0/0
正解：A、C
解説：
RFC 1918 defines IP address ranges that are reserved for private networks, which cannot be routed on the public internet. In Oracle Cloud Infrastructure (OCI), these private IP address ranges can be used to create Virtual Cloud Networks (VCNs). The valid RFC 1918 CIDR prefixes include:
192.168.0.0/16: A private IP range often used in home networks.
10.0.0.0/8: A large private IP range commonly used in enterprise networks.
Invalid Options:
B . 0.0.0.0/0: This CIDR represents all IP addresses and is not a valid private IP range.
C . 192.268.0.0/24: This is not a valid IP address range as the octet "268" is outside the allowable range of 0-255.
Reference:
Oracle Cloud Infrastructure Documentation: VCN Overview
RFC 1918: Address Allocation for Private Internets
質問 # 27
Which OCI service would you use to apply kernel security updates to all instances?
- A. Data Safe
- B. Container Registry
- C. Artifact Registry
- D. OS Management Service
正解：D
解説：
The OS Management Service in Oracle Cloud Infrastructure (OCI) is designed to manage and maintain the operating systems of your compute instances. This service allows you to apply kernel security updates, manage package installations, and monitor the status of updates across all instances in your environment.
Kernel Security Updates: With OS Management Service, you can automate and schedule kernel updates, ensuring that all instances are up-to-date with the latest security patches. This helps maintain the security and integrity of your infrastructure without needing to manually update each instance.
Other Options:
Container Registry: Used for storing and managing container images, not for applying OS updates.
Data Safe: A service focused on database security, not applicable for OS-level updates.
Artifact Registry: A repository for storing and managing software artifacts, not related to OS management.
Relevant OCI Documentation:
OS Management Service Overview
This documentation provides details on how to use OS Management Service to handle kernel security updates and other OS-level management tasks.
質問 # 28
You want to protect your VM instance from low-level threats, such as rootkits and bootkits. What should you do?
- A. Create a burstable instance.
- B. Create a shielded instance.
- C. Use Vulnerability Scanning Service.
- D. Use in-transit encryption.
正解：B
解説：
To protect your VM instance from low-level threats, such as rootkits and bootkits, you should create a shielded instance in Oracle Cloud Infrastructure (OCI). Shielded instances are designed to provide enhanced security features, including:
Secure Boot: Ensures that the instance boots only with trusted software.
Measured Boot: Records boot metrics, allowing verification that the instance has not been tampered with.
Trusted Platform Module (TPM): Provides additional security through cryptographic functions.
These features help protect against low-level threats that could compromise the integrity of the instance at boot time.
Reference:
Oracle Cloud Infrastructure Documentation: Shielded Instances
質問 # 29
A financial firm is designing an application architecture for its online trading platform that should have high availability and fault tolerance. What should the architect do to avoid any costly service disruptions and ensure data durability?
- A. Copy the Object Storage bucket to a block volume.
- B. Create a new Object Storage bucket in another region and configure recycle policy to move data every 5 days.
- C. Create a replication policy to send data to a different bucket in another OCI region.
- D. Create a lifecycle policy to regularly send data from the Standard to Archive storage.
正解：C
解説：
For an online trading platform requiring high availability and fault tolerance, it's critical to ensure data durability and avoid any costly service disruptions. In Oracle Cloud Infrastructure (OCI), Object Storage is often used to store critical data, such as transaction logs or user data, due to its scalability, durability, and reliability.
Option B is the most suitable approach for ensuring data durability and availability across regions. Here's why:
Cross-Region Replication (CRR): OCI offers a feature called Cross-Region Replication for Object Storage. This feature allows you to automatically and asynchronously replicate objects in a bucket from one OCI region to another. This setup ensures that even if one region experiences a failure, the data is still available in another region, thereby meeting the requirements for high availability and fault tolerance.
Data Durability: By replicating data to another region, you protect against regional outages. OCI guarantees 99.95% availability for replicated data, which is critical for a financial firm's trading platform where data consistency and durability are paramount.
Disaster Recovery: With data replicated in another region, the trading platform can quickly switch to using the data in the secondary region in case of a disaster in the primary region. This setup significantly reduces recovery time objectives (RTO) and ensures business continuity.
Reference:
Oracle Cloud Infrastructure Documentation: Cross-Region Replication for Object Storage Oracle Whitepaper: High Availability and Disaster Recovery in Oracle Cloud Infrastructure Explanation of Incorrect Options:
Option A: Creating a new Object Storage bucket in another region and configuring a recycle policy to move data every 5 days does not provide real-time data availability or the fault tolerance required for a financial application. Recycle policies are intended for managing the lifecycle of data, not for high availability or disaster recovery.
Option C: While lifecycle policies are useful for moving less frequently accessed data to a more cost-effective storage tier (e.g., from Standard to Archive), they do not address cross-region redundancy or real-time availability, which are critical for this use case.
Option D: Copying an Object Storage bucket to a block volume is not a recommended practice for ensuring data durability and fault tolerance. Block volumes are used for persistent storage attached to compute instances, and copying object storage data to block volumes does not achieve the same level of redundancy and cross-region availability as replication policies.
Thus, Option B is the correct and most efficient method for ensuring high availability and fault tolerance in this scenario.
質問 # 30
Which statement is TRUE about delegating an existing domain to the Oracle Cloud Infrastructure (OCI) DNS service?
- A. Domains can be delegated to OCI DNS via FastConnect partners.
- B. Domains can be self-delegated to OCI DNS from its own service portal.
- C. All domains can be retrieved to OCI DNS via DYN.
- D. Domains can be delegated to OCI DNS from the Domain Registrar's self-service portal.
正解：D
解説：
To delegate a domain to the Oracle Cloud Infrastructure (OCI) DNS service, the domain needs to be pointed to OCI's DNS servers. This can be done through the Domain Registrar's self-service portal, where you update the name servers for your domain to OCI's DNS servers.
Process: You typically log into the domain registrar where your domain is registered and replace the existing name servers with the name servers provided by OCI DNS. Once this is done, DNS queries for your domain will be directed to OCI DNS.
Reference:
Oracle Cloud Infrastructure Documentation: Managing DNS Zones
質問 # 31
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