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Download Oracle Cloud Infrastructure 2022 Developer Professional Exam Dumps
NEW QUESTION 22
You are developing a serverless application with Oracle Functions. You have created a function in compartment named prod. When you try to invoke your function you get the following error.
Error invoking function. status: 502 message: dhcp options ocid1.dhcpoptions.oc1.phx.aaaaaaaac... does not exist or Oracle Functions is not authorized to use it How can you resolve this error?
Allow function-family to use virtual-network-family in compartment prodB. Create a policy:
Allow any-user to manage function-family and virtual-network-family in compartment prodC. Deleting the function and redeploying it will fix the problemD. Create a policy:
Allow service FaaS to use virtual-network-family in compartment prod
Answer: D
Explanation:
Troubleshooting Oracle Functions:
There are common issues related to Oracle Functions and how you can address them.
Invoking a function returns a FunctionInvokeSubnetNotAvailable message and a 502 error (due to a DHCP Options issue) When you invoke a function that you've deployed to Oracle Functions, you might see the following error message:
{"code":"FunctionInvokeSubnetNotAvailable","message":"dhcp options ocid1.dhcpoptions........ does not exist or Oracle Functions is not authorized to use it"} Fn: Error invoking function. status: 502 message: dhcp options ocid1.dhcpoptions........ does not exist or Oracle Functions is not authorized to use it If you see this error:
Double-check that a policy has been created to give Oracle Functions access to network resources.
Create Policies to Control Access to Network and Function-Related Resources:
Service Access to Network Resources
When Oracle Functions users create a function or application, they have to specify a VCN and a subnet in which to create them. To enable the Oracle Functions service to create the function or application in the specified VCN and subnet, you must create an identity policy to grant the Oracle Functions service access to the compartment to which the network resources belong.
To create a policy to give the Oracle Functions service access to network resources:
Log in to the Console as a tenancy administrator.
Create a new policy in the root compartment:
Open the navigation menu. Under Governance and Administration, go to Identity and click Policies.
Follow the instructions in To create a policy, and give the policy a name (for example, functions-service-network-access).
Specify a policy statement to give the Oracle Functions service access to the network resources in the compartment:
Allow service FaaS to use virtual-network-family in compartment <compartment-name> For example:
Allow service FaaS to use virtual-network-family in compartment acme-network Click Create.
Double-check that the set of DHCP Options in the VCN specified for the application still exists.
References:
https://docs.cloud.oracle.com/en-us/iaas/Content/Functions/Tasks/functionstroubleshooting.htm
https://docs.cloud.oracle.com/en-us/iaas/Content/Functions/Tasks/functionscreatingpolicies.htm
NEW QUESTION 23
Which two statements are true for serverless computing and serverless architectures?
Answer: A,C
Explanation:
Oracle Functions is a fully managed, multi-tenant, highly scalable, on-demand, Functions-as-a-Service platform. It is built on enterprise-grade Oracle Cloud Infrastructure and powered by the Fn Project open source engine. Use Oracle Functions (sometimes abbreviated to just Functions) when you want to focus on writing code to meet business needs.
The serverless and elastic architecture of Oracle Functions means there's no infrastructure administration or software administration for you to perform. You don't provision or maintain compute instances, and operating system software patches and upgrades are applied automatically. Oracle Functions simply ensures your app is highly-available, scalable, secure, and monitored Applications built with a serverless infrastructure will scale automatically as the user base grows or usage increases. If a function needs to be run in multiple instances, the vendor's servers will start up, run, and end them as they are needed.
Oracle Functions is based on Fn Project. Fn Project is an open source, container native, serverless platform that can be run anywhere - any cloud or on-premises.
Serverless architectures are not built for long-running processes. This limits the kinds of applications that can cost-effectively run in a serverless architecture. Because serverless providers charge for the amount of time code is running, it may cost more to run an application with long-running processes in a serverless infrastructure compared to a traditional one.
https://docs.cloud.oracle.com/en-us/iaas/Content/Functions/Concepts/functionsconcepts.htm
https://www.cloudflare.com/learning/serverless/why-use-serverless/
NEW QUESTION 24
You are tasked with developing an application that requires the use of Oracle Cloud Infrastructure (OCI) APIs to POST messages to a stream in the OCI Streaming service.
Which statement is incorrect?
Answer: A
Explanation:
Authorization Header
The Oracle Cloud Infrastructure signature uses the "Signature" Authentication scheme (with an Authorization header), and not the Signature HTTP header.
Required Credentials and OCIDs
You need an API signing key in the correct format. See Required Keys and OCIDs.
You also need the OCIDs for your tenancy and user. See Where to Get the Tenancy's OCID and User's OCID.
Summary of Signing Steps
In general, these are the steps required to sign a request:
Form the HTTPS request (SSL protocol TLS 1.2 is required).
Create the signing string, which is based on parts of the request.
Create the signature from the signing string, using your private key and the RSA-SHA256 algorithm.
Add the resulting signature and other required information to the Authorization header in the request.
References:
https://docs.cloud.oracle.com/en-us/iaas/Content/Streaming/Concepts/streamingoverview.htm
https://docs.cloud.oracle.com/en-us/iaas/Content/API/Concepts/signingrequests.htm
NEW QUESTION 25
......
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