[2026年03月02日] 手に入れよう！最新1Z0-1072-25認定された有効な試験問題集解答
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Oracle 1Z0-1072-25 認定試験の出題範囲：
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質問 # 28
What would be the total meteredBytes shown by the File Storage service after the hourly update cycle is complete when you overwrite 0.5 GB of a 1 GB file?
- A. 1 GB
- B. 0.5 GB
- C. 1.5 GB
- D. 2.5 GB
正解：C
解説：
In Oracle Cloud Infrastructure (OCI) File Storage, when you overwrite a portion of a file, the service does not immediately reclaim the space occupied by the previous version of the file. The total meteredBytes reflects both the original data and the new data written.
Scenario Explanation: You start with a 1 GB file. When you overwrite 0.5 GB of this file, the file system retains both the 0.5 GB of the original file and the new 0.5 GB you wrote.
Calculation: The original 1 GB file contributes 1 GB to meteredBytes. When 0.5 GB is overwritten, the total usage becomes 1.5 GB (1 GB original + 0.5 GB new).
Thus, after the hourly update cycle, the total meteredBytes shown by the File Storage service will be 1.5 GB.
Reference:
Oracle Cloud Infrastructure Documentation: File Storage Service Overview
質問 # 29
Which Traffic Management Steering Policy facilitates the distribution of DNS traffic based on the geographical location of end users?
- A. IP Prefix Steering
- B. Proximity Steering
- C. Geolocation Steering
- D. ASN Steering
正解：C
解説：
Geolocation Steering in OCI's Traffic Management Steering Policy allows you to distribute DNS traffic based on the geographical location of the end users. This method helps direct users to the nearest regional endpoint, optimizing latency and improving user experience.
Use Cases: Geolocation Steering is commonly used to deliver region-specific content, comply with data residency laws, or optimize service performance by directing traffic to the closest available servers.
Reference:
Oracle Cloud Infrastructure Documentation: Traffic Management Steering Policies
質問 # 30
Which statement is NOT correct regarding the Oracle Cloud Infrastructure (OCI) File System snapshots?
- A. Snapshots are accessible under the root directory of the file system at .snapshot/name.
- B. Even if nothing has changed within the file system since the last snapshot was taken, a new snapshot consumes more storage.
- C. Snapshots are a consistent, point-in-time view of your file systems.
- D. Before you can clone a file system, at least one snapshot must exist for the file system.
正解：B
解説：
In OCI File Storage, snapshots are point-in-time, read-only copies of a file system that do not immediately consume additional storage beyond the space needed to track changes.
Incorrect Statement: The statement that a new snapshot consumes more storage even if nothing has changed is incorrect. Snapshots are space-efficient; they only consume additional storage as changes are made to the file system after the snapshot is taken. If no changes are made between snapshots, the storage consumption remains minimal.
Correct Statements:
B . Before cloning a file system, at least one snapshot must exist, as the clone operation relies on this snapshot to create a copy.
C . Snapshots are accessible under the .snapshot directory, allowing users to view and restore files from specific snapshots.
D . Snapshots provide a consistent, point-in-time view of the file system, ensuring data integrity.
Reference:
Oracle Cloud Infrastructure Documentation: Managing File System Snapshots
質問 # 31
Why was SSH still possible after port 22 was removed from the Security Lists?
- A. The VCN where that compute instance resides still has an Internet Gateway.
- B. The VNIC of that compute instance is attached to a Cluster Network.
- C. The VNIC of that compute instance is attached to a Network Security Group (NSG).
- D. The VCN where that compute instance resides still has a route rule.
正解：C
解説：
Even after removing port 22 from the Security Lists, SSH was still possible because the Virtual Network Interface Card (VNIC) of the compute instance is attached to a Network Security Group (NSG).
NSGs: NSGs provide a more flexible and granular way to manage security rules compared to Security Lists. They allow you to apply security rules directly to VNICs associated with resources such as compute instances. If an NSG allows traffic on port 22, SSH will still be possible, regardless of the Security List settings.
Reference:
Oracle Cloud Infrastructure Documentation: Security Lists and Network Security Groups
質問 # 32
Which OCI service would you use to apply kernel security updates to all instances?
- A. Data Safe
- B. Artifact Registry
- C. OS Management Service
- D. Container Registry
正解：C
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 # 33
What is a key advantage of utilizing administrator roles for access control within OCI IAM identity domains?
- A. Can be used to grant access to resources outside the identity domain
- B. Simplify access management by eliminating policy creation
- C. Provide granular control over user access to specific compartments
- D. Offer a wider range of permission combinations
正解：B
解説：
In Oracle Cloud Infrastructure (OCI) Identity and Access Management (IAM), administrator roles play a significant role in managing access:
Simplification of Access Management: Utilizing administrator roles allows you to simplify access management by eliminating the need to create complex IAM policies manually. These roles come with predefined permissions that cover common administrative tasks, reducing the effort needed to manage access controls.
Granular Control: While administrator roles provide a broad range of permissions, they may not offer the same level of granularity as custom policies.
Other Benefits:
Offer a wider range of permission combinations (A): While custom policies can offer more specific combinations, administrator roles are designed to cover a broad range of tasks.
Granting Access Outside Identity Domain (C): Administrator roles are generally scoped to their identity domain and do not provide cross-domain access.
Granular Control (D): Although administrator roles simplify management, custom policies are typically used when granular control over specific compartments or resources is needed.
Relevant OCI Documentation:
OCI IAM Roles Overview
This resource provides detailed information on how roles and policies are used in OCI to manage access.
質問 # 34
Why is the OCI Inter-Region Latency dashboard useful for optimizing data transfer and backup strategies?
- A. It provides real-time data specific to your tenancy's workloads.
- B. It's designed for troubleshooting latency issues within your specific applications.
- C. It offers a current and historical view of latency snapshots.
- D. It focuses solely on latency within your own tenancy.
正解：C
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 # 35
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 volume from any full volume backup but not from an incremental backup.
- D. You can restore a block volume backup to a larger volume size.
正解：D
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 # 36
Which OCI feature should be used to ensure that communication between database servers and OCI Object Storage is secure?
- A. Use a VPN Gateway
- B. Use a Service Gateway
- C. Use a Local Peering Gateway
- D. Use a NAT Gateway
正解：B
解説：
To ensure secure communication between database servers and OCI Object Storage, you should use a Service Gateway. A Service Gateway enables instances in your VCN to privately access OCI services like Object Storage without traversing the public internet.
Security: The traffic between your database servers and Object Storage remains within the Oracle network, providing a secure and high-performance connection.
Reference:
Oracle Cloud Infrastructure Documentation: Service Gateway Overview
質問 # 37
Which THREE protocols are supported by the Oracle Cloud Infrastructure (OCI) private Network Load Balancers?
- A. TCP
- B. HTTP
- C. BGP
- D. ICMP
- E. iSCSI
- F. UDP
正解：A、B、F
解説：
The OCI Private Network Load Balancer supports multiple protocols for managing traffic efficiently across your instances within a private subnet. Specifically, it supports:
UDP (User Datagram Protocol): Commonly used for applications that require fast, connectionless communication, such as video streaming or DNS services.
TCP (Transmission Control Protocol): A reliable, connection-oriented protocol, widely used for web traffic and other applications requiring data integrity.
HTTP (Hypertext Transfer Protocol): Frequently used for web traffic, it is an application-layer protocol built on top of TCP and enables communication between web browsers and servers.
The combination of these protocols allows the OCI Network Load Balancer to manage diverse workloads, including web services and real-time applications.
For reference:
OCI Load Balancer Documentation
質問 # 38
Which OCI Object Storage tier is suitable for storing the backup to minimize cost while meeting the requirements of immediate accessibility and retention of 31 days?
- A. Standard tier
- B. Auto-Tiering tier
- C. Infrequent Access tier
- D. Archive tier
正解：C
解説：
The Infrequent Access tier in OCI Object Storage is suitable for storing backups that need to be immediately accessible and retained for a specific period, such as 31 days, while also minimizing costs. This tier offers a balance between cost and accessibility, charging lower storage costs compared to the Standard tier but still allowing quick access to the data.
Use Case: The Infrequent Access tier is designed for data that is not frequently accessed but must remain readily available when needed, making it ideal for backup storage.
Reference:
Oracle Cloud Infrastructure Documentation: Object Storage Tiers
質問 # 39
What is the primary purpose of the Web Application Acceleration service offered by Oracle Cloud Infrastructure (OCI)?
- A. Monitoring and analyzing HTTP traffic patterns
- B. Speeding up traffic on layer 7 HTTP load balancers
- C. Improving the reliability of layer 7 HTTP load balancers
- D. Encrypting HTTP traffic
正解：B
解説：
The primary purpose of the Web Application Acceleration service offered by Oracle Cloud Infrastructure (OCI) is to speed up traffic on layer 7 HTTP load balancers. This service optimizes the delivery of web applications by reducing latency and improving response times, making it ideal for enhancing user experience on web applications.
Functionality: The service utilizes caching, compression, and other acceleration techniques to ensure that HTTP/S traffic is delivered efficiently.
Reference:
Oracle Cloud Infrastructure Documentation: Web Application Acceleration
質問 # 40
Which TWO statements about the Oracle Cloud Infrastructure (OCI) File Storage Service are accurate?
- A. Communication with file systems in a mount target is encrypted via HTTPS.
- B. Customers can encrypt data in their file system using their own Vault encryption key.
- C. Customers can encrypt the communication to a mount target via export options.
- D. File systems use Oracle-managed keys by default.
正解：B、D
解説：
Oracle Cloud Infrastructure (OCI) File Storage Service offers robust encryption capabilities to ensure data security.
B . Customer-Managed Encryption: Customers can choose to encrypt their data using their own keys stored in the OCI Vault service. This gives customers control over their encryption keys and enhances data security.
D . Oracle-Managed Encryption: By default, all data stored in OCI File Storage is encrypted using Oracle-managed keys. This ensures that data is encrypted at rest without requiring any action from the customer.
Incorrect Statements:
A . Communication is not encrypted via HTTPS when accessing file systems; instead, encryption in transit is typically managed via NFS over TLS.
C . Encryption of communication to a mount target is handled via network configurations, not through export options.
Reference:
Oracle Cloud Infrastructure Documentation: File Storage Encryption
質問 # 41
Which TWO options will accomplish a fully redundant connection from an on-premises data center to a Virtual Cloud Network (VCN) in the us-ashburn-1 region?
- A. Configure two FastConnect virtual circuits to the us-ashburn-1 region and terminate them in diverse hardware on-premises.
- B. Configure one FastConnect virtual circuit to the us-ashburn-1 region and the second FastConnect virtual circuit to the us-phoenix-1 region.
- C. Configure one FastConnect virtual circuit to the us-ashburn-1 region and a Site-to-Site VPN to the us-ashburn-1 region.
- D. Configure a Site-to-Site VPN from a single on-premises CPE.
正解：A、C
解説：
For a fully redundant connection from an on-premises data center to a VCN in the OCI us-ashburn-1 region, it is important to ensure high availability and fault tolerance. Here's how each option contributes to redundancy:
Option B: Two FastConnect Virtual Circuits:
FastConnect provides a dedicated, private connection with higher bandwidth and more consistent performance compared to a VPN. To achieve redundancy, you can configure two FastConnect circuits in the same region (us-ashburn-1), each terminated on diverse hardware on-premises. This setup ensures that even if one circuit or its associated hardware fails, the other circuit can maintain the connection. This ensures no single point of failure in the connectivity to OCI. Thus, option B is correct.
Option D: FastConnect and Site-to-Site VPN:
Another approach to redundancy is to have a mix of connection types. By setting up one FastConnect circuit and one Site-to-Site VPN, both terminating in the same region (us-ashburn-1), you create a diverse connection path. If the FastConnect connection fails, traffic can automatically route through the VPN connection, maintaining connectivity. This setup adds an extra layer of redundancy, making option D correct as well.
Incorrect Options:
Option A: Only configuring a Site-to-Site VPN from a single on-premises CPE does not provide redundancy because it involves just one connection path. If that connection or the CPE fails, there would be no fallback.
Option C: Configuring FastConnect circuits to different regions (us-ashburn-1 and us-phoenix-1) does not provide redundancy within a single region but rather across regions, which is not required for regional redundancy.
Relevant OCI Documentation:
OCI FastConnect Overview
Using Site-to-Site VPN and FastConnect for Redundancy
These references offer more detailed information on setting up redundant connections and the benefits of each connection type within OCI.
質問 # 42
Which statement is true about pre-authenticated requests?
- A. Pre-authenticated requests can be used to delete buckets.
- B. Deleting a pre-authenticated request does not revoke access.
- C. You cannot edit a pre-authenticated request.
- D. You need to provide your OCI credentials to the partner company.
正解：C
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 # 43
Which statement is NOT true about the Oracle Cloud Infrastructure (OCI) Object Storage service?
- A. Object lifecycle rules can be used to archive or delete objects.
- B. Object Storage resources can be shared across tenancies.
- C. Immutable option for data stored in Object Storage can be set via retention rules.
- D. Object Versioning is enabled at the namespace level.
正解：B
解説：
Oracle Cloud Infrastructure (OCI) Object Storage is a scalable, highly durable service that allows you to store any type of data in a secure and cost-effective manner. The correct and incorrect statements regarding OCI Object Storage are as follows:
A . Immutable Option: You can indeed set an immutable option for data in Object Storage using retention rules. This feature ensures that once data is written, it cannot be modified or deleted until the retention period expires, making it ideal for regulatory compliance.
C . Object Lifecycle Rules: Object lifecycle policies allow you to automate the archiving or deletion of objects based on their age or other criteria, helping manage storage costs and data retention efficiently.
D . Object Versioning: Versioning is enabled at the bucket level, not the namespace level. However, once enabled for a bucket, it helps retain, retrieve, and restore every version of every object stored in that bucket.
B . Object Storage Sharing Across Tenancies: This statement is not true. OCI Object Storage buckets and objects are specific to a tenancy and cannot be shared across different tenancies directly. Access to Object Storage resources is controlled within a single tenancy through IAM policies.
Relevant OCI Documentation:
OCI Object Storage Overview
Object Lifecycle Management
These references provide details on how Object Storage functions and the features available.
質問 # 44
Which Oracle Cloud Infrastructure (OCI) Identity and Access Management (IAM) policy is invalid?
- A. Allow group 'Default'/'A-Developers' to create volumes in compartment Project-A
- B. Allow dynamic-group 'Default'/'FrontEnd' to manage instance-family in compartment Project-A
- C. Allow group 'Default'/'A-Admins' to manage all-resources in compartment Project-A
- D. Allow any-user to inspect users in tenancy
正解：D
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 # 45
Which TWO statements are TRUE about Private IP addresses in Oracle Cloud Infrastructure (OCI)?
- A. Each VNIC can only have one private IP address.
- B. A private IP can have an optional public IP assigned to it if it resides in a public subnet.
- C. By default, the primary VNIC of an instance in a subnet has one primary private IP address.
- D. By default, the primary VNIC of an instance in a subnet has one primary private IP address and one secondary private IP address.
正解：B、C
解説：
In Oracle Cloud Infrastructure (OCI), understanding how private IP addresses work is crucial for configuring network interfaces and managing instances within your Virtual Cloud Network (VCN).
Primary VNIC and Private IP Address:
When an instance is launched in OCI, it is attached to a Virtual Network Interface Card (VNIC). The primary VNIC, which is automatically created during the instance launch, is associated with a primary private IP address by default. This private IP address is essential for the instance to communicate within the VCN. The primary private IP address is automatically assigned and cannot be removed from the primary VNIC while the instance is running. This supports the statement C.
Additional Private IPs:
Contrary to statement B, each VNIC can indeed have multiple private IP addresses, but by default, the primary VNIC comes with only one primary private IP. You can manually add secondary private IPs if needed. However, the additional IPs are not assigned by default; hence, A is incorrect.
Public IP Association:
For instances requiring internet access, a public IP address can be optionally assigned to the private IP address if the instance is in a public subnet. This is critical for scenarios where an instance needs to communicate with the internet or external networks. This aligns with statement D.
Relevant OCI Documentation:
Oracle Cloud Infrastructure Networking Overview
VNICs and Private IPs
These references provide additional context and detail on how private IP addresses work within OCI and clarify the correct statements.
質問 # 46
How would you allow access to FSS for a DB System with read-only permissions?
- A. Modify the security list to allow stateless ingress rules.
- B. Modify the security list to allow stateful ingress rules.
- C. Create an NFS export option that allows READ_ONLY access.
- D. Create an instance principal for the DB System.
正解：C
解説：
To allow access to Oracle Cloud Infrastructure (OCI) File Storage Service (FSS) for a Database (DB) System with read-only permissions, you should create an NFS export option that specifies READ_ONLY access.
NFS Export Options: These options define the access permissions (read/write or read-only) for clients connecting to the file system. By setting the export option to READ_ONLY, you ensure that the DB System can only read from the FSS and cannot modify or delete files.
Reference:
Oracle Cloud Infrastructure Documentation: File Storage Service Export Options
質問 # 47
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. The instance will get terminated.
- C. The instance is either reboot-migrated or rebuilt in place for you.
- D. You will receive another notification to reboot within the next 7 days.
正解：C
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 # 48
Why is the Network Visualizer tool valuable for managing virtual network infrastructure on OCI?
- A. It generates automated reports on network performance metrics.
- B. It offers real-time monitoring of network traffic.
- C. It visualizes the topology of all VCNS in a selected region and tenancy.
- D. It provides detailed information about the physical network components.
正解：C
解説：
The Network Visualizer tool in Oracle Cloud Infrastructure is valuable because it visualizes the topology of all Virtual Cloud Networks (VCNs) in a selected region and tenancy.
Topology Visualization: The Network Visualizer provides a graphical representation of the network components and their relationships within a VCN, including subnets, route tables, gateways, and security lists. This visualization helps users understand the network architecture and troubleshoot issues effectively.
Other Options:
Real-time monitoring of network traffic (B), detailed information about physical network components (C), and automated reports on network performance metrics (D) are not the primary functions of the Network Visualizer. These functionalities are typically handled by other OCI services or tools.
Relevant OCI Documentation:
Network Visualizer Overview
This documentation details the features and benefits of the Network Visualizer tool in OCI.
質問 # 49
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