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Oracle 1Z0-1084-22 Exam

Certification Provider: Oracle
Exam Name: Oracle Cloud Infrastructure 2022 Developer Professional
Duration: 90 Minutes
Number of questions in our database: 74
Exam Version: May. 21, 2023
1Z0-1084-22 Exam Official Topics:
  • Topic 1: Build event-driven serverless applications using OCI event service/ Explain DevOps and discuss the role of container orchestration
  • Topic 2: Apply security measures to overcome challenges with cloud native development/ Explain docker and the concepts around its architecture and components
  • Topic 3: Create integration between systems using OCI streaming service/ Explain the microservices architecture and discuss the design methodology of microservices
  • Topic 4: Create API gateways to process traffic from API clients and route it to back-end services/ Leveraging Serverless Technologies for Cloud Native Development
  • Topic 5: Discuss various strategies for testing cloud native applications/ Cloud Native Applications And Containerization
  • Topic 6: Explain cloud native testing and discuss measures for testing cloud native applications/ Develop Serverless Application with Oracle Functions
  • Topic 7: Use OCI Logging service to enable, manage, and search logs/ Testing and Securing Cloud Native Applications
  • Topic 8: Monitoring & Troubleshooting Cloud Native Applications/ Perform Tasks around Monitoring, Logging, and Tracing
  • Topic 9: Utilize OCI Monitoring service to view metrics/ Explain the fundamentals of cloud native and discuss the key pillars of cloud native development

Free Oracle 1Z0-1084-22 Exam Actual Questions

The questions for 1Z0-1084-22 were last updated On May. 21, 2023

Question #1

What can you use to dynamically make Kubernetes resources discoverable to public DNS servers?

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Correct Answer: A

Setting up ExternalDNS for Oracle Cloud Infrastructure (OCI):

Inspired byKubernetes DNS, Kubernetes' cluster-internal DNS server, ExternalDNS makes Kubernetes resources discoverable via public DNS servers. Like KubeDNS, it retrieves a list of resources (Services, Ingresses, etc.) from theKubernetes APIto determine a desired list of DNS records.

In a broader sense,ExternalDNSallows you tocontrol DNS records dynamically via Kubernetes resources in a DNS provider-agnostic way

Deploy ExternalDNS

Connect yourkubectlclient to the cluster you want to test ExternalDNS with. We first need to create a config file containing the information needed to connect with the OCI API.

Create a new file (oci.yaml) and modify the contents to match the example below. Be sure to adjust the values to match your own credentials:

auth:

region: us-phoenix-1

tenancy: ocid1.tenancy.oc1...

user: ocid1.user.oc1...

key: |

-----BEGIN RSA PRIVATE KEY-----

-----END RSA PRIVATE KEY-----

fingerprint: af:81:71:8e...

compartment: ocid1.compartment.oc1...

References:

https://github.com/kubernetes-sigs/external-dns/blob/master/README.md

https://github.com/kubernetes-sigs/external-dns/blob/master/docs/tutorials/oracle.md


Question #2

What is the communication method between different Cloud native applications services?

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Correct Answer: D

What Is Cloud Native?

Cloud native technologies are characterized by the use of containers, microservices, serverless functions, development pipelines, infrastructure expressed as code, event-driven applications, and Application Programming Interfaces (APIs). Cloud native enables faster software development and the ability to build applications that are resilient, manageable, observable, and dynamically scalable to global enterprise levels.

When constructing a cloud-native application, you'll want to be sensitive to how back-end services communicate with each other. Ideally, the less inter-service communication, the better. However, avoidance isn't always possible as back-end services often rely on one another to complete an operation.

While direct HTTP calls between microservices are relatively simple to implement, care should be taken to minimize this practice. To start, these calls are alwayssynchronousand will block the operation until a result is returned or the request times outs. What were once self-contained, independent services, able to evolve independently and deploy frequently, now become coupled to each other. As coupling among microservices increase, their architectural benefits diminish.

Executing an infrequent request that makes a single direct HTTP call to another microservice might be acceptable for some systems. However, high-volume calls that invoke direct HTTP calls to multiple microservices aren't advisable. They can increase latency and negatively impact the performance, scalability, and availability of your system. Even worse, along series of direct HTTP communication can lead to deep and complex chains of synchronous microservices calls,shown in Figure 4-9:

A message queue is an intermediary construct through which a producer and consumer pass a message. Queuesimplement an asynchronous, point-to-point messaging pattern.

Events

Message queuingis an effective way to implement communication where a producer canasynchronouslysend a consumer a message.

References:

https://www.xenonstack.com/blog/cloud-native-architecture/

https://www.oracle.com/sa/cloud/cloud-native/

https://www.oracle.com/technetwork/topics/entarch/cloud-native-app-development-wp-3664668.pdf


Question #3

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

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Correct Answer: B, D

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 #4

What is the communication method between different Cloud native applications services?

Reveal Solution Hide Solution
Correct Answer: D

What Is Cloud Native?

Cloud native technologies are characterized by the use of containers, microservices, serverless functions, development pipelines, infrastructure expressed as code, event-driven applications, and Application Programming Interfaces (APIs). Cloud native enables faster software development and the ability to build applications that are resilient, manageable, observable, and dynamically scalable to global enterprise levels.

When constructing a cloud-native application, you'll want to be sensitive to how back-end services communicate with each other. Ideally, the less inter-service communication, the better. However, avoidance isn't always possible as back-end services often rely on one another to complete an operation.

While direct HTTP calls between microservices are relatively simple to implement, care should be taken to minimize this practice. To start, these calls are alwayssynchronousand will block the operation until a result is returned or the request times outs. What were once self-contained, independent services, able to evolve independently and deploy frequently, now become coupled to each other. As coupling among microservices increase, their architectural benefits diminish.

Executing an infrequent request that makes a single direct HTTP call to another microservice might be acceptable for some systems. However, high-volume calls that invoke direct HTTP calls to multiple microservices aren't advisable. They can increase latency and negatively impact the performance, scalability, and availability of your system. Even worse, along series of direct HTTP communication can lead to deep and complex chains of synchronous microservices calls,shown in Figure 4-9:

A message queue is an intermediary construct through which a producer and consumer pass a message. Queuesimplement an asynchronous, point-to-point messaging pattern.

Events

Message queuingis an effective way to implement communication where a producer canasynchronouslysend a consumer a message.

References:

https://www.xenonstack.com/blog/cloud-native-architecture/

https://www.oracle.com/sa/cloud/cloud-native/

https://www.oracle.com/technetwork/topics/entarch/cloud-native-app-development-wp-3664668.pdf


Question #5

In a Linux environment, what is the default location of the configuration file that Oracle Cloud Infrastructure CLI uses for profile information? (Choose the best answer.)

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Correct Answer: A

Before using Oracle Functions, you must have an Oracle Cloud Infrastructure CLI configuration file that contains the credentials of the user account that you will be using to create and deploy functions. These user account credentials are referred to as a 'profile'.

By default, the Oracle Cloud Infrastructure CLI configuration file is located at~/.oci/config. You might already have a configuration file as a result of installing the Oracle Cloud Infrastructure CLI. However, you don't need to have installed the Oracle Cloud Infrastructure CLI in order to use Oracle Functions.

References:

https://docs.cloud.oracle.com/en-us/iaas/Content/Functions/Tasks/functionsconfigureocicli.htm#:~:text=By%20default%2C%20the%20Oracle%20Cloud,file%20is%20located%20at%20~%2F.

https://docs.cloud.oracle.com/en-us/iaas/Content/API/SDKDocs/cliconfigure.htm



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