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NEW QUESTION 48
You are working on a cloud native e-commerce application on Oracle Cloud Infrastructure (OCI). Your application architecture has multiple OCI services, including Oracle Functions. You need to trigger these functions directly from other OCI services, without having to run custom code.
Which OCI service cannot trigger your functions directly?
Answer: C
Explanation:
Overview of Functions:
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. With Oracle Functions, you can write code in Java, Python, Node, Go, and Ruby (and for advanced use cases, bring your own Dockerfile, and Graal VM).
You can invoke a function that you've deployed to Oracle Functions from:
- The Fn Project CLI.
- The Oracle Cloud Infrastructure SDKs.
- Signed HTTP requests to the function's invoke endpoint. Every function has an invoke endpoint.
- Other Oracle Cloud services (for example, triggered by an event in the Events service) or from external services.
so You can then deploy your code, call it directly or trigger it in response to events, and get billed only for the resources consumed during the execution.
Invoking Oracle Functions from Other Oracle Cloud Infrastructure Services:
You can invoke functions in Oracle Functions from other Oracle Cloud Infrastructure services. Typically, you'll want an event in another service to trigger a request to invoke a function defined in Oracle Functions.
This functionality is currently available in:
1. The Events service. For more information, see Overview of Events.
2.The Notifications service. For more information, see Notifications Overview. For a scenario, see Scenario A: Automatically Resize VMs.
3.The API Gateway service. For more information, see Adding a Function in Oracle Functions as an API Gateway Back End.
4.The Oracle Integration service, using the OCI Signature Version 1 security policy. For more information, see Configure Oracle Integration to Call Oracle Cloud Infrastructure Functions with the REST Adapter in Using the REST Adapter with Oracle Integration.
so OCI Registry services cannot trigger your functions directly
References:
https://docs.cloud.oracle.com/en-us/iaas/Content/Functions/Tasks/functionsintegratingwithother.htm
https://docs.cloud.oracle.com/en-us/iaas/Content/Functions/Concepts/functionsoverview.htm
https://blogs.oracle.com/cloud-infrastructure/announcing-notifications-triggers-for-serverless-functions
NEW QUESTION 49
You are developing a distributed application and you need a call to a path to always return a specific JSON content deploy an Oracle Cloud Infrastructure API Gateway with the below API deployment specification.
What is the correct value for type?
Answer: A
Explanation:
Adding Stock Responses as an API Gateway Back End:
You'll often want to verify that an API has been successfully deployed on an API gateway without having to set up an actual back-end service. One approach is to define a route in the API deployment specification that has a path to a 'dummy' back end. On receiving a request to that path, the API gateway itself acts as the back end and returns a stock response you've specified.
Equally, there are some situations in a production deployment where you'll want a particular path for a route to consistently return the same stock response without sending a request to a back end. For example, when you want a call to a path to always return a specific HTTP status code in the response.
Using the API Gateway service, you can define a path to a stock response back end that always returns the same:
HTTP status code
HTTP header fields (name-value pairs)
content in the body of the response
"type": "STOCK_RESPONSE_BACKEND" indicates that the API gateway itself will act as the back end and return the stock response you define (the status code, the header fields and the body content).
References:
https://docs.cloud.oracle.com/en-us/iaas/Content/APIGateway/Tasks/apigatewayaddingstockresponses.htm
NEW QUESTION 50
In a Linux environment, what is the default location of the configuration file that Oracle Cloud Infrastructure CLI uses for profile information? (Choose the best answer.)
Answer: B
Explanation:
Before using Oracle Functions, you must have an Oracle Cloud Infrastructure CLI configuration file that contains the credentials of the user account that you will be using to create and deploy functions. These user account credentials are referred to as a 'profile'.
By default, the Oracle Cloud Infrastructure CLI configuration file is located at ~/.oci/config. You might already have a configuration file as a result of installing the Oracle Cloud Infrastructure CLI. However, you don't need to have installed the Oracle Cloud Infrastructure CLI in order to use Oracle Functions.
References:
https://docs.cloud.oracle.com/en-us/iaas/Content/Functions/Tasks/functionsconfigureocicli.htm#:~:text=By%20default%2C%20the%20Oracle%20Cloud,file%20is%20located%20at%20~%2F.
https://docs.cloud.oracle.com/en-us/iaas/Content/API/SDKDocs/cliconfigure.htm
NEW QUESTION 51
Which header is NOT required when signing GET requests to Oracle Cloud Infrastructure APIs?
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.
This section describes the headers that must be included in the signing string:
For GET and DELETE requests (when there's no content in the request body), the signing string must include at least these headers:
(request-target)
host
date or x-date (if both are included, Oracle uses x-date)
For PUT and POST requests (when there's content in the request body), the signing string must include at least these headers:
(request-target)
host
date or x-date (if both are included, Oracle uses x-date)
x-content-sha256 (except for Object Storage PUT requests; see the next section) content-type content-length References:
https://docs.cloud.oracle.com/en-us/iaas/Content/API/Concepts/signingrequests.htm
NEW QUESTION 52
You are developing a polyglot serverless application using Oracle Functions. Which language cannot be used to write your function code?
Answer: B
Explanation:
Overview of Functions:
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. With Oracle Functions, you can write code in Java, Python, Node, Go, and Ruby (and for advanced use cases, bring your own Dockerfile, and Graal VM). You can then deploy your code, call it directly or trigger it in response to events, and get billed only for the resources consumed during the execution.
References:
https://docs.cloud.oracle.com/en-us/iaas/Content/Functions/Concepts/functionsoverview.htm
NEW QUESTION 53
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