1Z0-1084-20 Online Practice Questions and Answers

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: D

If you are running your Kubernetes cluster on Oracle Container Engine for Kubernetes (commonly known as OKE), you can have OCI automatically provision load balancers for you by creating a Service of type LoadBalancer instead of (or in addition to) installing an ingress controller like Traefik or Voyage YAML file

When you apply this YAML file to your cluster, you will see the new service is created. After a short time (typically less than a minute) the OCI Load Balancer will be provisioned.

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

Correct Answer: D

You can invoke a function that you've deployed to Oracle Functions in different ways:

Using the Fn Project CLI.

Using the Oracle Cloud Infrastructure CLI.

Using the Oracle Cloud Infrastructure SDKs.

Making a signed HTTP request to the function's invoke endpoint. Every function has an invoke endpoint.

Correct Answer: BE

Service Choreography Service choreography is a global description of the participating services, which is defined by exchange of messages, rules of interaction and agreements between two or more endpoints. Choreography employs a decentralized approach for service composition. the decision logic is distributed, with no centralized point.

Choreography, in contrast, does not rely on a central coordinator. and all participants in the choreography need to be aware of the business process, operations to execute, messages to exchange, and the timing of message exchanges.

Correct Answer: A

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

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: C

Oracle Cloud Infrastructure provides a number of DevOps tools and plug-ins for working with Oracle Cloud Infrastructure services. These can simplify provisioning and managing infrastructure or enable automated testing and continuous delivery. A/B Testing While A/B testing can be combined with either canary or blue-green deployments, it is a very different thing. A/B testing really targets testing the usage behavior of a service or feature and is typically used to validate a hypothesis or to measure two versions of a service or feature and how they stack up against each other in terms of performance, discoverability and usability. A/B testing often leverages feature flags (feature toggles), which allow you to dynamically turn features on and off. Integration Testing Integration tests are also known as end-to-end (e2e) tests. These are long-running tests that exercise the system in the way it is intended to be used in production. These are the most valuable tests in demonstrating reliability and thus increasing confidence. Penetration Testing Oracle regularly performs penetration and vulnerability testing and security assessments against the Oracle cloud infrastructure, platforms, and applications. These tests are intended to validate and improve the overall security of Oracle Cloud Services.

Correct Answer: B

kubectl explain to List the fields for supported resources

https://kubernetes.io/docs/reference/generated/kubectl/kubectl-commands#explain

Correct Answer: D

Oracle Cloud Infrastructure Web Application Firewall (WAF) is a cloud-based, Payment Card Industry (PCI) compliant, global security service that protects applications from malicious and unwanted internet traffic. WAF can protect any internet facing endpoint, providing consistent rule enforcement across a customer's applications. WAF provides you with the ability to create and manage rules for internet threats including Cross- Site Scripting (XSS), SQL Injection and other OWASP-defined vulnerabilities. Unwanted bots can be mitigated while tactically allowed desirable bots to enter. Access rules can limit based on geography or the signature of the request.

Correct Answer: C

https://docs.cloud.oracle.com/en-us/iaas/Content/ResourceManager/Concepts/resourcemanager.htm Following are brief descriptions of key concepts and the main components of Resource Manager. CONFIGURATION Information to codify your infrastructure. A Terraform configuration can be either a solution or a file that you write and upload. JOB Instructions to perform the actions defined in your configuration. Only one job at a time can run on a given stack; further, you can have only one set of Oracle Cloud Infrastructure resources on a given stack. To provision a different set of resources, you must create a separate stack and use a different configuration. Resource Manager provides the following job types: Plan: Parses your Terraform configuration and creates an execution plan for the associated stack. The execution plan lists the sequence of specific actions planned to provision your Oracle Cloud Infrastructure resources. The execution plan is handed off to the apply job, which then executes the instructions. Apply. Applies the execution plan to the associated stack to create (or modify) your Oracle Cloud Infrastructure resources. Depending on the number and type of resources specified, a given apply job can take some time. You can check status while the job runs. Destroy. Releases resources associated with a stack. Released resources are not deleted. For example, terminates a Compute instance controlled by a stack. The stack's job history and state remain after running a destroy job. You can monitor the status and review the results of a destroy job by inspecting the stack's log files. Import State. Sets the provided Terraform state file as the current state of the stack. Use this job to migrate local Terraform environments to Resource Manager. STACK The collection of Oracle Cloud Infrastructure resources corresponding to a given Terraform configuration. Each stack resides in the compartment you specify, in a single region; however, resources on a given stack can be deployed across multiple regions. An OCID is assigned to each stack.

Correct Answer: C

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) (as described in draft-cavage-http-signatures-08) host date or x-date (if both are included,

Oracle uses x-date)

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

Correct Answer: A

"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). https://docs.cloud.oracle.com/en-us/iaas/Content/APIGateway/Tasks/ apigatewayaddingstockresponses.htm

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

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.

Correct Answer: AD

Oracle SQL Developer Web in Autonomous Data Warehouse provides a development environment and a data modeler interface for Autonomous Databases. SQL Developer Web is available for databases with both dedicated Exadata infrastructure and shared Exadata infrastructure. https://docs.cloud.oracle.com/enus/iaas/Content/Database/Tasks/adbtools.htm