Correct Answer: DE

Applications in the Function services In Oracle Functions, an application is:

1.

a logical grouping of functions

2.

a common context to store configuration variables that are available to all functions in the application When you define an application in Oracle Functions, you specify the subnets in which to run the functions in the application.

Correct Answer: AC

A PersistentVolume (PV) is a piece of storage in the cluster that has been provisioned by an administrator. PVs are volume plugins like Volumes, but have a lifecycle independent of any individual Pod that uses the PV. A PersistentVolumeClaim (PVC) is a request for storage by a user. It is similar to a Pod. Pods consume node resources and PVCs consume PV resources. If you intend to create Kubernetes persistent volumes, sufficient block volume quota must be available in each availability domain to meet the persistent volume claim. Persistent volume claims must request a minimum of 50 gigabytes You can define and apply a persistent volume claim to your cluster, which in turn creates a persistent volume that's bound to the claim. A claim is a block storage volume in the underlying IaaS provider that's durable and offers persistent storage, enabling your data to remain intact, regardless of whether the containers that the storage is connected to are terminated. With Oracle Cloud Infrastructure as the underlying IaaS provider, you can provision persistent volume claims by attaching volumes from the Block Storage service.

Correct Answer: A

microservice is larger and can do more than a function. A function is a relatively small bit of code that performs only one action in response to an event. In many cases, microservices can be decomposed into a number of smaller stateless functions. The difference between microservices and functions is not simply the size. Functions are stateless, and they require no knowledge about or configuration of the underlying server--hence, the term serverless. https://developer.oracle.com/java/fn-project-introduction.html

Correct Answer: A

https://docs.oracle.com/en/cloud/iaas/wercker-cloud/wercm/quickstarts/platforms/kubernetes/

Correct Answer: B

Testing using API mocks Developers are frequently tasked with writing code that integrates with other system components via APIs. Unfortunately, it might not always be desirable or even possible to actually access those systems during development. There could be security, performance or maintenance issues that make them unavailable ? or they might simply not have been developed yet. 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

Correct Answer: C

https://docs.cloud.oracle.com/en-us/iaas/Content/API/Concepts/sdks.htm

Software Development Kits (SDKs) Build and deploy apps that integrate with Oracle Cloud Infrastructure services. Each SDK provides the tools you need to develop an app, including code samples and documentation to create, test, and troubleshoot. In addition, if you want to contribute to the development of the SDKs, they are all open source and available on GitHub. SDK for Java Python SDK Ruby SDK Go SDK

Correct Answer: B

Debugging Pods

The first step in debugging a pod is taking a look at it. Check the current state of the pod and recent events

with the following command:

kubectl describe pods ${POD_NAME}

Look at the state of the containers in the pod. Are they all Running? Have there been recent restarts?

Continue debugging depending on the state of the pods.

My pod stays pending

If a pod is stuck in Pending it means that it can not be scheduled onto a node. Generally this is because

there are insufficient resources of one type or another that prevent scheduling. Look at the output of the kubectl describe ... command above. There should be messages from the scheduler about why it can not schedule your pod. https://kubernetes.io/docs/tasks/debug-application-cluster/debug-pod-replication-controller/

Correct Answer: C

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. 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. 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 A rolling update offers a way to deploy the new version of your application gradually across your cluster.

Correct Answer: C

In the API Gateway service, a back end is the means by which a gateway routes requests to the back- end services that implement APIs. If you add a private endpoint back end to an API gateway, you give the API gateway access to the VCN associated with that private endpoint. You can also grant an API gateway access to other Oracle Cloud Infrastructure services as back ends. For example, you could grant an API gateway access to Oracle Functions, so you can create and deploy an API that is backed by a serverless function. API Gateway service to create an API gateway, you can create an API deployment to access HTTP and HTTPS URLs. https://docs.cloud.oracle.com/en-us/iaas/Content/APIGateway/Tasks/ apigatewayusinghttpbackend.htm API Gateway service to create an API gateway, you can create an API deployment that invokes serverless functions defined in Oracle Functions. https://docs.cloud.oracle.com/en-us/iaas/Content/APIGateway/Tasks/ apigatewayusingfunctionsbackend.htm API Gateway service, you can define a path to a stock response back end https://docs.cloud.oracle.com/en-us/iaas/Content/ APIGateway/Tasks/ apigatewayaddingstockresponses.htm

Correct Answer: C

https://www.oracle.com/webfolder/technetwork/tutorials/FAQs/oci/Functions-FAQ.pdf 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.