With the volume of communication that can happen between different components in cloud-native applications, it is vital to not only test functionality, but also service resiliency.
Which statement is true with regards to service resiliency? (Choose the best answer.)

• A.Resiliency is about avoiding failures.
• B.A goal of resiliency is not to bring a service to a functioning state after a failure.
• C.Resiliency testing can be only done in a test environment.
• D.Resiliency is about recovering from failures without downtime or data loss.

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You are deploying an API via Oracle Cloud Infrastructure (OCI) API Gateway and you want to implement request policies to control access Which is NOT available in OCI API Gateway?

• A.Controlling access to OCI resources
• B.Providing authentication and authorization
• C.Enabling CORS (Cross-Origin Resource Sharing) support
• D.Limiting the number of requests sent to backend services

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You have deployed a Python application on Oracle Cloud Infrastructure Container Engine for Kubernetes.
However, during testing you found a bug that you rectified and created a new Docker image. You need to make sure that if this new Image doesn't work then you can roll back to the previous version.
Using kubectl, which deployment strategies should you choose?

• A.Rolling Update
• B.Canary Deployment
• C.Blue/Green Deployment
• D.A/B Testing

Correct Answer: C

Explanation
Using Blue-Green Deployment to Reduce Downtime and Risk:
>Blue-green deployment is a technique that reduces downtime and risk by running two identical production environments called Blue and Green. At any time, only one of the environments is live, with the live environment serving all production traffic. For this example, Blue is currently live and Green is idle.
This technique can eliminate downtime due to app deployment. In addition, blue-green deployment reduces risk: if something unexpected happens with your new version on Green, you can immediately roll back to the last version by switching back to Blue.

>Canary deployments are a pattern for rolling out releases to a subset of users or servers. The idea is to first deploy the change to a small subset of servers, test it, and then roll the change out to the rest of the servers.
The canary deployment serves as an early warning indicator with less impact on downtime: if the canary deployment fails, the rest of the servers aren't impacted.
>A/B testing is a way to compare two versions of a single variable, typically by testing a subject's response to variant A against variant B, and determining which of the two variants is more effective
>Rolling update offers a way to deploy the new version of your application gradually across your cluster.
References:
https://docs.cloudfoundry.org/devguide/deploy-apps/blue-green.html

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A developer using Oracle Cloud Infrastructure (OCI) API Gateway must authenticate the API requests to their web application. The authentication process must be implemented using a custom scheme which accepts string parameters from the API caller. Which method can the developer use In this scenario?

• A.Create an authorizer function using request header authorization.
• B.Create an authorizer function using token-based authorization.
• C.Create an authorizer function using OCI Identity and Access Management based authentication
• D.Create a cross account functions authorizer.

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You need to execute a script on a remote instance through Oracle Cloud Infrastructure Resource Manager.
Which option can you use?

• A.Use /bin/sh with the full path to the location of the script to execute the script.
• B.It cannot be done.
• C.Download the script to a local desktop and execute the script.
• D.Use remote-exec

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