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質問 # 20
Why is the OCI Inter-Region Latency dashboard useful for optimizing data transfer and backup strategies?
- A. It focuses solely on latency within your own tenancy.
- 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 provides real-time data specific to your tenancy's workloads.
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 # 21
Which statement is true about instance configurations and instance pools in OCI?
- A. An instance pool can have multiple instance configurations associated with it.
- B. You can only delete an instance configuration if it is not associated with any instance pool.
- C. You can delete an instance configuration if it is associated with an instance pool.
- D. You cannot reuse the same instance configuration for multiple instance pools.
正解：B
質問 # 22
Which statement is TRUE about delegating an existing domain to the Oracle Cloud Infrastructure (OCI) DNS service?
- A. Domains can be self-delegated to OCI DNS from its own service portal.
- B. All domains can be retrieved to OCI DNS via DYN.
- C. Domains can be delegated to OCI DNS from the Domain Registrar's self-service portal.
- D. Domains can be delegated to OCI DNS via FastConnect partners.
正解：C
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 # 23
Which TWO statements are true about performing a multipart upload using the Multipart Upload API?
- A. You can keep adding parts as long as the total number is less than 10,000.
- B. Each part can be as large as 50 GIB.
- C. You do not have to commit the upload after uploading all parts.
- D. You do not need to split the object into parts.
正解：A、B
解説：
When performing a multipart upload using the Multipart Upload API in Oracle Cloud Infrastructure (OCI) Object Storage, the following points are true:
C . Each part can be as large as 50 GiB: OCI allows each part of a multipart upload to be up to 50 GiB in size. This enables the efficient uploading of large objects in smaller, manageable parts.
D . You can keep adding parts as long as the total number is less than 10,000: The Multipart Upload API supports up to 10,000 parts for a single object. This allows the upload of very large objects by dividing them into multiple parts.
Incorrect Statements:
A . After uploading all parts, you must commit the upload to finalize the multipart upload and combine all parts into a single object.
B . The object must be split into parts before uploading when using the Multipart Upload API.
Reference:
Oracle Cloud Infrastructure Documentation: Multipart Uploads
質問 # 24
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. Infrequent Access tier
- B. Archive tier
- C. Auto-Tiering tier
- D. Standard tier
正解：A
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 # 25
Which Traffic Management Steering Policy facilitates the distribution of DNS traffic based on the geographical location of end users?
- A. IP Prefix Steering
- B. Geolocation Steering
- C. ASN Steering
- D. Proximity Steering
正解：B
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 # 26
Which compute capacity type would you select to meet these requirements?
- A. On-demand capacity
- B. Dedicated host
- C. Preemptible capacity
- D. Capacity reservation
正解：A
解説：
On-demand capacity is the compute capacity type in Oracle Cloud Infrastructure (OCI) that allows you to provision and use compute instances whenever needed, without any long-term commitment. This flexibility is ideal for various workloads, including development, testing, and production environments, where immediate availability and scalability are crucial.
Key Points:
On-Demand Capacity: On-demand compute instances provide users with the flexibility to spin up instances as required and only pay for the time the instances are running. This model is most suitable for workloads with unpredictable usage patterns or short-term requirements.
Flexibility and Scalability: With on-demand capacity, you can quickly scale your resources up or down based on your application's needs, ensuring that you only pay for the resources you actually use.
No Commitment: Unlike reserved capacity, on-demand capacity does not require any long-term commitment or upfront payment, making it an attractive option for organizations looking to avoid capital expenditures.
Reference:
Oracle Cloud Infrastructure Documentation: OCI Compute Pricing
Oracle Cloud Infrastructure Documentation: Compute Instance Lifecycle
Explanation of Incorrect Options:
A . Capacity reservation: This option allows you to reserve capacity in advance, ensuring that resources are available when needed. It's ideal for predictable workloads but may not be as cost-effective for fluctuating demands.
B . Preemptible capacity: Preemptible instances are a lower-cost option where instances can be terminated by OCI if resources are needed elsewhere. This is suitable for non-critical workloads that can tolerate interruptions.
D . Dedicated host: Dedicated hosts provide physical servers for your exclusive use, offering isolation and predictable performance. This option is more suitable for workloads requiring dedicated resources or compliance needs.
Thus, Option C: On-demand capacity is the correct choice for most general-purpose workloads needing flexibility and immediate availability without long-term commitment.
質問 # 27
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. 2.5 GB
- B. 0.5 GB
- C. 1.5 GB
- D. 1 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 # 28
Which is NOT a necessary step to complete this setup for instance principals?
- A. Create a policy granting permissions to the dynamic group to access services in your compartment or tenancy.
- B. Create a dynamic group with matching rules to specify which instances can make API calls against services.
- C. Generate Auth Tokens to enable instances in the dynamic group to authenticate with APIs.
- D. Deploy the application and the SDK to all the instances that belong to the dynamic group.
正解：C
解説：
Instance principals in OCI allow compute instances to directly make API calls against OCI services without requiring a user account. To set up instance principals, the following steps are necessary:
A . Deploy the application and SDK: The application running on the instances must use the OCI SDK or CLI to make API calls.
B . Create a dynamic group: Define a dynamic group with matching rules to identify which instances can use the API permissions.
C . Create a policy: Write an IAM policy that grants the dynamic group the necessary permissions to access services.
Option D is NOT necessary because instances in a dynamic group use instance principals to authenticate and do not require Auth Tokens, which are used for user authentication with APIs.
Reference:
Oracle Cloud Infrastructure Documentation: Using Instance Principals
質問 # 29
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 restore a volume from any full volume backup but not from an incremental backup.
- C. You can restore a block volume backup to a larger volume size.
- D. You can only restore a volume to the same availability domain in which the original block volume resides.
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 # 30
You can attach resources to a Dynamic Routing Gateway (DRG). Select THREE of these resources.
- A. Local Peering Connection
- B. Remote Peering Connections
- C. IPSec Tunnel
- D. VNIC
- E. Virtual Circuits
- F. Subnet
正解：B、C、E
解説：
A Dynamic Routing Gateway (DRG) in Oracle Cloud Infrastructure (OCI) is a virtual router that provides a path for private traffic between your on-premises network and your VCN, or between your VCN and other VCNs. The resources that can be attached to a DRG include:
A . Virtual Circuits: Used to establish a private connection between your on-premises data center and your VCN via Oracle's FastConnect service.
D . Remote Peering Connections: Enables peering between VCNs located in different regions (Remote VCN Peering).
E . IPSec Tunnel: Facilitates secure VPN connections between your on-premises network and your OCI VCN.
Reference:
Oracle Cloud Infrastructure Documentation: Dynamic Routing Gateway Overview
質問 # 31
What would happen if you choose not to proactively reboot the instance before the scheduled maintenance due date?
- A. The instance is either reboot-migrated or rebuilt in place for you.
- B. You will receive another notification to reboot within the next 14 days.
- C. The instance will get terminated.
- D. You will receive another notification to reboot within the next 7 days.
正解：A
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 # 32
How can OCI IAM be configured to facilitate cross-region access?
- A. The administrator can grant users permissions to access specific resources in the other region.
- B. The identity domain automatically replicates to the other region.
- C. Identity domain replication must be enabled.
- D. Users can access resources in all regions by default.
正解：A
解説：
In Oracle Cloud Infrastructure (OCI), cross-region access is facilitated by configuring IAM policies that grant users or groups permissions to access resources in other regions. IAM policies in OCI are global, meaning they apply across all regions by default. However, an administrator can specifically configure these policies to allow or restrict access to resources in different regions.
Example: An administrator can write a policy that allows a user to manage compute instances in a specific region by including the region's name in the policy statement.
Reference:
Oracle Cloud Infrastructure Documentation: IAM Policies
質問 # 33
Which statement is NOT correct regarding the Oracle Cloud Infrastructure (OCI) File System snapshots?
- A. Snapshots are a consistent, point-in-time view of your file systems.
- B. Even if nothing has changed within the file system since the last snapshot was taken, a new snapshot consumes more storage.
- C. Before you can clone a file system, at least one snapshot must exist for the file system.
- D. Snapshots are accessible under the root directory of the file system at .snapshot/name.
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 # 34
You enabled Cross Region Replication for the volume and selected US West (San Jose) as the destination region. What should you do to create a new volume from the volume replica?
- A. Activate the replica.
- B. No action required. By default, the replica is available as a block volume.
- C. Initiate the replica.
- D. Trigger the replica.
正解：B
解説：
When Cross-Region Replication is enabled for a block volume in Oracle Cloud Infrastructure (OCI), the replication process automatically creates and maintains a synchronized copy of the block volume in the selected destination region (in this case, US West (San Jose)).
Replica Availability: The replicated volume is immediately available as a block volume in the destination region. You do not need to take any additional action to activate or trigger the replica.
Creating New Volumes: Since the replica is automatically available as a block volume, you can directly use it to create a new volume in the destination region without any manual intervention.
Relevant OCI Documentation:
Cross-Region Block Volume Replication
This documentation outlines how cross-region replication works and confirms that no additional steps are needed to create a new volume from a replica
質問 # 35
Which OCI service would you use to apply kernel security updates to all instances?
- A. Container Registry
- B. OS Management Service
- C. Data Safe
- D. Artifact Registry
正解：B
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 # 36
Which policy would you write to provide admin access to all three of your existing admin groups for a shared Test compartment?
- A. Allow any-user to manage all-resources in compartment Test where request.principal.group.tag.EmployeeGroup.Role='Admin'
- B. Allow group any-group to manage all-resources in compartment Test where request.principal.group.tag.EmployeeGroup.Role='Admin'
- C. Allow all-group to manage all-resources in compartment Test where request.principal.group.tag.EmployeeGroup.Role='Admin'
- D. Allow dynamic-group to manage all-resources in compartment Test where request.principal.group.tag.EmployeeGroup.Role='Admin'
正解：C
解説：
In Oracle Cloud Infrastructure (OCI), policies are written to define permissions for user groups. The correct policy to provide admin access to all three existing admin groups in a shared compartment (in this case, the "Test" compartment) would be:
"Allow all-group to manage all-resources in compartment Test where request.principal.group.tag.EmployeeGroup.Role='Admin'".
"Allow all-group": Grants access to all groups.
"to manage all-resources": Specifies full access permissions (manage includes all CRUD operations).
"in compartment Test": Limits the scope of the policy to the "Test" compartment.
"where request.principal.group.tag.EmployeeGroup.Role='Admin'": Adds a condition to restrict this admin-level access to only groups tagged with the role 'Admin'.
This policy ensures that only users in the groups tagged as Admin will be allowed to manage resources in the Test compartment, making it the most suitable choice for providing admin access.
For reference:
OCI Policy Syntax Documentation
質問 # 37
Which TWO statements are TRUE about Private IP addresses in Oracle Cloud Infrastructure (OCI)?
- A. By default, the primary VNIC of an instance in a subnet has one primary private IP address.
- B. By default, the primary VNIC of an instance in a subnet has one primary private IP address and one secondary private IP address.
- C. A private IP can have an optional public IP assigned to it if it resides in a public subnet.
- D. Each VNIC can only have one private IP address.
正解：A、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 # 38
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