1z0-1084-22 Oracle Cloud Infrastructure 2022 Developer Professional - Practice Questions

Question 1

You have been asked to create a stateful application deployed in Oracle Cloud Infrastructure (OCI) Container Engine for Kubernetes (OKE) that requires all of your worker nodes to mount and write data to persistent volumes.

Which two OCI storage services should you use?

Select all that apply, then click Submit answer.

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Use OCI File Services as persistent volume.
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Use GlusterFS as persistent volume.
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Use OCI Block Volume backed persistent volume.
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Use open source storage solutions on top of OCI.
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Use OCI Object Storage as persistent volume.

Reference / correct answer:

Use OCI File Services as persistent volume.

Use OCI Block Volume backed persistent volume.

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.

https://oracle.github.io/weblogic-kubernetes-operator/faq/oci-fss-pv/

https://kubernetes.io/docs/concepts/storage/persistent-volumes/

Question 2

What are two of the main reasons you would choose to implement a serverless architecture?

Select all that apply, then click Submit answer.

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No need for integration testing
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Reduced operational cost
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Improved In-function state management
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Automatic horizontal scaling
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Easier to run long-running operations

Reference / correct answer:

Reduced operational cost

Automatic horizontal scaling

Serverless computing refers to a concept in which the user does not need to manage any server infrastructure at all. The user does not run any servers, but instead deploys the application code to a service provider’s platform. The application logic is executed, scaled, and billed on demand, without any costs to the user when the application is idle.

Benefits of the Serverless or FaaS

So far almost every aspect of Serverless or FaaS is discussed in a brief, so let’s talk about the pros and cons of using Serverless or FaaS

Reduced operational and development cost

Serverless or FaaS offers less operational and development cost as it encourages to use third-party services like Auth, Database and etc.

Scaling

Horizontal scaling in Serverless or FaaS is completely automatic, elastic and managed by FaaS provider. If your application needs more requests to be processed in parallel the provider will take of that without you providing any additional configuration.

References:

https://medium.com/@avishwakarma/serverless-or-faas-a-deep-dive-e67908ca69d5

https://qvik.com/news/serverless-faas-computing-costs/

https://pages.awscloud.com/rs/112-TZM-766/images/PTNR_gsc-serverless-ebook_Feb-2019.pdf

Question 3

Which two statements accurately describe an Oracle Functions application?

Select all that apply, then click Submit answer.

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A small block of code invoked in response to an Oracle Cloud Infrastructure (OCI) Events service
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A Docker image containing all the functions that share the same configuration
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An application based on Oracle Functions, Oracle Cloud Infrastructure (OCI) Events and OCI API Gateway services
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A common context to store configuration variables that are available to all functions in the application
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A logical group of functions

1z0-1084-22 – Oracle Cloud Infrastructure 2022 Developer Professional