Oracle 1Z0-1084-22 Online Practice Questions and Exam Preparation

Oracle 1Z0-1084-22 Online Questions & Answers

• Question 1:

  You have two microservices, A and B running in production. Service A relies on APIs from service B. You want to test changes to service A without deploying all of its dependencies, which includes service B. Which approach should you take to test service A?

  A. Test against production APIs.
  B. Test using API mocks.
  C. There is no need to explicitly test APIs.
  D. Test the APIs in private environments.
  B. Test using API mocks.

  ---

  Explanation/Reference:

  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

• Question 2:

  A pod security policy (PSP) is implemented in your Oracle Cloud Infrastructure Container Engine for Kubernetes cluster Which rule can you use to prevent a container from running as root using PSP?

  A. NoPrivilege
  B. RunOnlyAsUser
  C. MustRunAsNonRoot
  D. forbiddenRoot
  C. MustRunAsNonRoot

  ---

  Explanation/Reference:

  # Require the container to run without root privileges.

  rule: 'MustRunAsNonRoot'

  Reference: https://kubernetes.io/docs/concepts/policy/pod-security-policy/

• Question 3:

  Your organization uses a federated identity provider to login to your Oracle Cloud Infrastructure (OCI) environment. As a developer, you are writing a script to automate some operation and want to use OCI CLI to do that. Your security team

  doesn't allow storing private keys on local machines.

  How can you authenticate with OCI CLI?

  A. Run oci setup keys and provide your credentials
  B. Run oci session refresh --profile
  C. Run oci session authenticate and provide your credentials
  D. Run oci setup oci-cli-rc --file path/to/target/file
  C. Run oci session authenticate and provide your credentials

  ---

  Explanation/Reference:

  Token-based authentication for the CLI allows customers to authenticate their session interactively, then use the CLI for a single session without an API signing key. This enables customers using an identity provider that is not SCIM-

  supported to use a federated user account with the CLI and SDKs.

  Starting a Token-based CLI Session

  To use token-based authentication for the CLI on a computer with a web browser:

  In the CLI, run the following command. This will launch a web browser.

  oci session authenticate

  In the browser, enter your user credentials. This authentication information is saved to the .config file.

• Question 4:

  You are processing millions of files in an Oracle Cloud Infrastructure (OCI) Object Storage bucket. Each time a new file is created, you want to send an email to the customer and create an order in a database. The solution should perform and minimize cost, Which action should you use to trigger this email?

  A. Schedule a cron job that monitors the OCI Object Storage bucket and emails the customer when a new file is created.
  B. Use OCI Events service and OCI Notification service to send an email each time a file is created.
  C. Schedule an Oracle Function that checks the OCI Object Storage bucket every minute and emails the customer when a file is found.
  D. Schedule an Oracle Function that checks the OCI Object Storage bucket every second and emails the customer when a file is found.
  B. Use OCI Events service and OCI Notification service to send an email each time a file is created.

  ---

  Explanation/Reference:

  Oracle Cloud Infrastructure Events enables you to create automation based on the state changes of resources throughout your tenancy. Use Events to allow your development teams to automatically respond when a resource changes its state. Here are some examples of how you might use Events: Send a notification to a DevOps team when a database backup completes. Convert files of one format to another when files are uploaded to an Object Storage bucket. You can only deliver events to certain Oracle Cloud Infrastructure services with a rule. Use the following services to create actions: Notifications Streaming Functions

  

• Question 5:

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

  A. ExternalDNS
  B. CoreDNS
  C. DynDNS
  D. kubeDNS
  A. ExternalDNS

  ---

  Explanation/Reference:

  ExternalDNS allows you to control DNS records dynamically via Kubernetes resources in a DNS provider-agnostic way 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 6:

  Which is NOT a supported SDK on Oracle Cloud Infrastructure (OCI)?

  A. Ruby SDK
  B. Java SDK
  C. Python SDK
  D. Go SDK
  E. .NET SDK
  E. .NET SDK

  ---

  Explanation/Reference:

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

• Question 7:

  You are developing a polyglot serverless application using Oracle Functions. Which language cannot be used to write your function code?

  A. PL/SQL
  B. Python
  C. Node.js
  D. Java
  A. PL/SQL

  ---

  Explanation/Reference:

  The serverless and elastic architecture of Oracle Functions means there's no infrastructure administration or software administration for you to perform. You don't provision or maintain compute instances, and operating system software patches and upgrades are applied automatically. Oracle Functions simply ensures your app is highly-available, scalable, secure, and monitored. With Oracle Functions, you can write code in Java, Python, Node, Go, and Ruby (and for advanced use cases, bring your own Dockerfile, and Graal VM). You can then deploy your code, call it directly or trigger it in response to events, and get billed only for the resources consumed during the execution.

• Question 8:

  You have written a Node.js function and deployed it to Oracle Functions. Next, you need to call this function from a microservice written in Java deployed on Oracle Cloud Infrastructure (OCI) Container Engine for Kubernetes (OKE). Which can help you to achieve this?

  A. Use the OCI CLI with kubect1 to invoke the function from the microservice.
  B. Oracle Functions does not allow a microservice deployed on OKE to invoke a function.
  C. OKE does not allow a microservice to invoke a function from Oracle Functions.
  D. Use the OCI Java SDK to invoke the function from the microservice.
  D. Use the OCI Java SDK to invoke the function from the microservice.

  ---

  Explanation/Reference:

  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.

• Question 9:

  Given a service deployed on Oracle Cloud infrastructure Container Engine for Kubernetes (OKE), which annotation should you add in the sample manifest file to specify a 400 Mbps load balancer?

  

  A. service.beta, kubernetes. lo/oci-load-balancer-kind: 400Mbps
  B. service, beta, kubernetes. lo/oci-load-balancer-value: 4 00Mbps
  C. service . beta. kubernetes . lo/oci-load-balancer-shape: 400Mbps
  D. service . beta . kubernetes . lo/oci-load-balancer-size: 400Mbps
  C. service . beta. kubernetes . lo/oci-load-balancer-shape: 400Mbps

  ---

  Explanation/Reference:

  The shape of an Oracle Cloud Infrastructure load balancer specifies its maximum total bandwidth (that is, ingress plus egress). By default, load balancers are created with a shape of 100Mbps. Other shapes are available, including 400Mbps

  and 8000Mbps.

  To specify an alternative shape for a load balancer, add the following annotation in the metadata section of the manifest file:

  service.beta.kubernetes.io/oci-load-balancer-shape: where value is the bandwidth of the shape (for example, 100Mbps, 400Mbps, 8000Mbps).

  For example:

  apiVersion: v1

  kind: Service

  metadata:

  name: my-nginx-svc

  labels:

  app: nginx

  annotations:

  service.beta.kubernetes.io/oci-load-balancer-shape: 400Mbps spec:

  type: LoadBalancer

  ports:

  -port: 80 selector: app: nginx https://github.com/oracle/oci-cloud-controller-manager/blob/master/docs/load-balancer-annotations.md

• Question 10:

  Who is responsible for patching, upgrading and maintaining the worker nodes in Oracle Cloud Infrastructure Container Engine for Kubernetes (OKE)?

  A. It Is automated
  B. Independent Software Vendors
  C. Oracle Support
  D. The user
  D. The user

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  Explanation/Reference:

  After a new version of Kubernetes has been released and when Container Engine for Kubernetes supports the new version, you can use Container Engine for Kubernetes to upgrade master nodes running older versions of Kubernetes. Because Container Engine for Kubernetes distributes the Kubernetes Control Plane on multiple Oracle-managed master nodes (distributed across different availability domains in a region where supported) to ensure high availability, you're able to upgrade the Kubernetes version running on master nodes with zero downtime. Having upgraded master nodes to a new version of Kubernetes, you can subsequently create new node pools running the newer version. Alternatively, you can continue to create new node pools that will run older versions of Kubernetes (providing those older versions are compatible with the Kubernetes version running on the master nodes). Note that you upgrade master nodes by performing an `in-place' upgrade, but you upgrade worker nodes by performing an `out-of-place' upgrade. To upgrade the version of Kubernetes running on worker nodes in a node pool, you replace the original node pool with a new node pool that has new worker nodes running the appropriate Kubernetes version. Having 'drained' existing worker nodes in the original node pool to prevent new pods starting and to delete existing pods, you can then delete the original node pool.