Question # 1
| Which statement accurately describes ephemeral principals? | | A. Ephemeral principals are temporary credentials granted to resources. | | B. Ephemeral principals are another term for dynamic groups. | | C. Ephemeral principals are user accounts with limited lifespans. | | D. Ephemeral principals represent long-lived service accounts. |
A. Ephemeral principals are temporary credentials granted to resources.
Explanation:
Ephemeral principals in Oracle Cloud Infrastructure (OCI) refer to temporary security credentials granted to resources, such as compute instances, to enable them to interact with OCI services securely. These credentials have a limited lifespan and are typically used in situations where resources need to authenticate temporarily without the need for long-lived credentials.
Use Case:Ephemeral principals are often used for instance principals, allowing compute instances to make API calls without the need to manage long-term keys or credentials.
References:
Oracle Cloud Infrastructure Documentation:Using Instance Principals
=================
Question # 2
| Which statement is true about pre-authenticated requests? | | A. You cannot edit a pre-authenticated request. | | B. Deleting a pre-authenticated request does not revoke access. | | C. You need to provide your OCI credentials to the partner company. | | D. Pre-authenticated requests can be used to delete buckets. |
A. You cannot edit a pre-authenticated request.
Explanation:
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 PARdoes 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.
=================
Question # 3
| 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. $59,500.00 | | B. $59,415.00 | | C. $0.00 (free with OCI) | | D. $150,000.00 |
A. $59,500.00
Explanation:
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.
References:
Oracle Cloud Infrastructure Pricing:OCI Pricing
=================
Question # 4
| Which statement is TRUE about delegating an existing domain to the Oracle Cloud Infrastructure (OCI) DNS service? | | A. All domains can be retrieved to OCI DNS via DYN. | | B. Domains can be delegated to OCI DNS from the Domain Registrar's self-service portal. | | C. Domains can be delegated to OCI DNS via FastConnect partners. | | D. Domains can be self-delegated to OCI DNS from its own service portal. |
B. Domains can be delegated to OCI DNS from the Domain Registrar's self-service portal.
Explanation:
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.
References:
Oracle Cloud Infrastructure Documentation:Managing DNS Zones
=================
Question # 5
| Which is NOT a necessary step to complete this setup for instance principals? | | A. Deploy the application and the SDK to all the instances that belong to the dynamic group. | | B. Create a dynamic group with matching rules to specify which instances can make API calls against services. | | C. Create a policy granting permissions to the dynamic group to access services in your compartment or tenancy. | | D. Generate Auth Tokens to enable instances in the dynamic group to authenticate with APIs. |
D. Generate Auth Tokens to enable instances in the dynamic group to authenticate with APIs.
Explanation:
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 necessarybecause instances in a dynamic group use instance principals to authenticate and do not require Auth Tokens, which are used for user authentication with APIs.
References:
Oracle Cloud Infrastructure Documentation:Using Instance Principals
=================
Question # 6
| 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 and one secondary private IP address. | | B. Each VNIC can only have one private IP address. | | C. By default, the primary VNIC of an instance in a subnet has one primary private IP address. | | D. 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. A private IP can have an optional public IP assigned to it if it resides in a public subnet.
Explanation:
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 statementC.
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,Ais 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 statementD.
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.
=================
Question # 7
| 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. 192.168.0.0/16 | | B. 0.0.0.0/0 | | C. 192.268.0.0/24 | | D. 10.0.0.0/8 |
A. 192.168.0.0/16
D. 10.0.0.0/8
Explanation:
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.
References:
Oracle Cloud Infrastructure Documentation:VCN Overview
RFC 1918: Address Allocation for Private Internets
=================
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