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NEW QUESTION 24
You have two microservices, A and B running in production. Service A relies on APIs from service B.
You want to test changes to service A without deploying all of its dependencies, which includes service B.
Which approach should you take to test service A?

• A. Test against production APIs.
• B. Test using API mocks.
• C. There is no need to explicitly test APIs.
• D. Test the APIs in private environments.

Answer: B

Explanation:
Best Practices: API Mocking:
This is where mocking comes in: instead of developing code with actual external dependencies in place, a mock of those dependencies is created and used instead. Depending on your development needs this mock is made "intelligent" enough to allow you to make the calls you need and get similar results back as you would from the actual component, thus enabling development to move forward without being hindered by eventual unavailability of external systems you depend on The most common term for creating simulated components is mocking, but others are also used, and partly apply to different things; stubbing, simulation, and virtualization. The basic concept is the same - instead of using an actual software component (an API in our case) - a "replacement" version of that API is created and used instead. It behaves as the original API, but lacks many of the functional and non-functional characteristics of the original component. Which term is applicable depends on the degree to which the mock-up corresponds to the actual API:
Stubbing: mostly a placeholder without real functionality
Mocking: basic functionality required for a specific testing or development purpose Simulation: complete functionality for testing or development purposes Virtualization: imulation that is deployed into an operational, manageable and controllable environment

References:
https://docs.oracle.com/en/solutions/build-governance-app-oracle-paas/test-custom-apis.html
https://www.soapui.org/learn/mocking/what-is-api-mocking/

NEW QUESTION 25
Which statements is incorrect with regards to the Oracle Cloud Infrastructure (OCI) Notifications service?

• A. A subscription can integrate with PagerDuty events.
• B. An OCI function may subscribe to a notification topic.
• C. Notification topics may be assigned as the action performed by an OCI Events configuration.
• D. It may be used to receive an email each time an OCI Autonomous Database backup is completed.
• E. A subscription can forward notifications to an HTTPS endpoint.
• F. OCI Alarms can be configured to publish to a notification topic when triggered.

Answer: D

Explanation:
Notification service supports subscriptions topics: E-Mail, Function, Https, PagerDuty and Slack

Alarms: Notifications sends alarm messages when alarms are breached. The alarm message is sent to the topic specified in the alarm. For example, an alarm message might be configured for high CPU usage. See Managing Alarms.

References:
https://docs.cloud.oracle.com/en-us/iaas/Content/Notification/Concepts/notificationoverview.htm

NEW QUESTION 26
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?

• A. An HTTP 401 will be returned if the client's clock is skewed more than 5 minutes from the server's.
• B. The request must include an authorization signing string including (but not limited to) x-content-sha256, content-type, and content-length headers.
• C. The Content-Type header must be Set to application/j son
• D. The request does not require an Authorization header.

Answer: D

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 27
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