1z0-1072-25 Oracle Cloud Infrastructure 2025 Architect Associate Questions and Answers

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.

Remote peering in Oracle Cloud Infrastructure allows two VCNs in different regions to communicate securely. To establish remote peering, the following components are required:

Two VCNs with Nonoverlapping CIDRs:

The CIDR blocks of the two VCNs must not overlap. This is crucial to avoid routing conflicts and ensure that traffic is correctly routed between the VCNs.

Dynamic Routing Gateway (DRG) Attached to Each VCN:

A DRG is a virtual router that provides a path for traffic between the VCN and networks outside the VCN, such as other VCNs via remote peering, on-premises networks, or other cloud services. Each VCN needs its own DRG.

Remote Peering Connection (RPC):

An RPC is a specialized connection on the DRG used specifically for remote peering. You need to create an RPC on each DRG associated with the VCNs you wish to peer.

Connection Between RPCs:

Finally, a connection must be established between the RPCs of the two DRGs. This connection facilitates the secure and private exchange of traffic between the VCNs over Oracle's backbone network.

Incorrect Options:

Option A involves a single VCN, which does not fulfill the requirement of remote peering between two VCNs.

Option B involves overlapping CIDRs and VPN gateways, which are incorrect for remote peering.

Option C suggests peering within the same region, which would be considered local peering rather than remote peering.

Relevant OCI Documentation:

OCI Remote VCN Peering

Dynamic Routing Gateway (DRG) Overview

These resources provide a detailed guide on configuring remote peering in OCI, ensuring secure and effective communication between VCNs across regions.

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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.

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.

To securely grant a third-party application access to specific Oracle Cloud Infrastructure (OCI) resources, the recommended approach is to configure the application to use Instance Principal. This method allows the application to authenticate directly with OCI services without needing to manage sensitive credentials like passwords or API keys.

Instance Principals: Enable compute instances to directly make API calls against OCI services, inheriting permissions through IAM policies. This setup is more secure than sharing user credentials, as it avoids hardcoding credentials within the application and leverages OCI's native security features.

In Oracle Cloud Infrastructure (OCI), when you need a full-featured Identity-as-a-Service (IDaaS) solution, the appropriate Identity Domain type to create is Premium.

Premium Identity Domain: This option provides a comprehensive set of identity and access management (IAM) capabilities, including advanced security features, identity governance, and support for enterprise-grade integrations. It supports managing user identities, multifactor authentication, and various other identity services required for a robust IDaaS solution.

Other Options:

External User: This is a limited domain type typically used for managing users who only need access to specific external services.

Free: This domain type offers limited features and is not intended for full-featured enterprise IAM requirements.

Oracle Apps Premium: This is tailored for integrating with Oracle applications but does not offer the broad capabilities of the Premium option.

Relevant OCI Documentation:

Oracle Identity Domains Overview

This documentation explains the various identity domain types and their use cases within OCI.

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Instance configurations and instance pools are used in OCI to manage groups of instances collectively:

Deleting Instance Configurations: An instance configuration cannot be deleted if it is currently associated with an instance pool. You must first disassociate or delete the instance pool before you can delete the instance configuration.

Reusing Instance Configurations: You can reuse the same instance configuration for multiple instance pools, which allows you to deploy identical groups of instances in different contexts.

Instance Pools: A single instance pool can only be associated with one instance configuration, ensuring uniformity across the instances in the pool.

Relevant OCI Documentation:

Instance Configuration Overview

Instance Pools Overview

These references explain how to manage instance configurations and pools, including the rules for deletion.

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In Oracle Cloud Infrastructure (OCI), when you move a database instance to a different compartment, the following impact on user access occurs:

Impact of Moving Resources: When you move a resource, like a database instance, to a different compartment, the IAM policies that grant access to that resource in the original compartment no longer apply. This effectively revokes access for users or groups unless equivalent policies are in place in the new compartment.

Restoring Access: To restore access, you would need to create new IAM policies in the destination compartment that grant the necessary permissions to the users or groups who need access.

Relevant OCI Documentation:

Managing Compartments

Moving Resources

These resources provide detailed steps on how compartment changes impact resource access and management.

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In Oracle Cloud Infrastructure (OCI), when a block volume is detached from an instance, its performance level is automatically adjusted to the "Lower Cost" tier, which provides 0 VPUs (Volume Performance Units) per GB. This adjustment helps reduce costs when the block volume is not actively being used by a compute instance.

Key Points:

Volume Performance Levels: OCI offers various performance tiers for block volumes, including "Higher Performance," "Balanced," and "Lower Cost." These tiers determine the level of IOPS (Input/Output Operations Per Second) and throughput available to the volume.

Automatic Adjustment: When a block volume is detached from an instance, OCI automatically optimizes the cost by switching the volume to the "Lower Cost" performance tier. This tier offers minimal performance, suitable for data that is not actively accessed.

Cost Management: This automatic adjustment is beneficial for managing costs, as it prevents users from incurring unnecessary charges for higher performance levels when the volume is not in use.

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.

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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.

OCI Confidential Computing is a security feature designed to protect data in use. This is particularly important for sensitive workloads where data must be secured not only when at rest or in transit but also while being processed.

Encrypts and Isolates In-Use Data: OCI Confidential Computing ensures that data and the applications processing it are isolated from the underlying infrastructure. This means that even if the infrastructure is compromised, the in-use data remains secure. The technology typically leverages secure enclaves or other hardware-based isolation mechanisms to achieve this.

Other Options:

Optimizing Network Performance (A), Automatic Scalability and Load Balancing (B), and Secure Data Storage (D) are important features, but they are not related to the core capabilities of Confidential Computing, which focuses on in-use data protection.

Relevant OCI Documentation:

OCI Confidential Computing Overview

This documentation provides a detailed explanation of how OCI Confidential Computing works and its benefits for securing sensitive data during processing.

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