Oracle 1Z0-1084-20 Online Practice Questions and Exam Preparation

Oracle 1Z0-1084-20 Online Questions & Answers

• Question 31:

  As a cloud-native developer, you are designing an application that depends on Oracle Cloud Infrastructure (OCI) Object Storage wherever the application is running. Therefore, provisioning of storage buckets should be part of your Kubernetes deployment process for the application. Which should you leverage to meet this requirement?

  A. OCI Service Broker for Kubernetes
  B. OCI Container Engine for Kubernetes
  C. Open Service Broker API
  D. Oracle Functions
  A. OCI Service Broker for Kubernetes

  ---

  https://blogs.oracle.com/cloud-infrastructure/introducing-service-broker-for-kubernetes OCI Service Broker for Kubernetes is an implementation of the Open Service Broker API. OCI Service Broker for Kubernetes is specifically for interacting with Oracle Cloud Infrastructure services from Kubernetes clusters. It includes three service broker adapters to bind to the following Oracle Cloud Infrastructure services: Object Storage Autonomous Transaction Processing Autonomous Data Warehouse

• Question 32:

  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?

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

• Question 33:

  Which is NOT a valid option to execute a function deployed on Oracle Functions?

  A. Send a signed HTTP requests to the function's invoke endpoint
  B. Invoke from Oracle Cloud Infrastructure CLI
  C. Invoke from Docker CLI
  D. Trigger by an event in Oracle Cloud Infrastructure Events service
  E. Invoke from Fn Project CLI
  C. Invoke from Docker CLI

  ---

  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.

  Each of the above invokes the function via requests to the API. Any request to the API must be authenticated by including a signature and the OCID of the compartment to which the function belongs in the request header. Such a request is

  referred to as a 'signed' request. The signature includes Oracle Cloud Infrastructure credentials in an encrypted form.

• Question 34:

  Which two handle Oracle Functions authentication automatically?

  A. Oracle Cloud Infrastructure SDK
  B. cURL
  C. Oracle Cloud Infrastructure CLl
  D. Signed HTTP Request
  E. Fn Project CLI
  C. Oracle Cloud Infrastructure CLl
  E. Fn Project CLI

  ---

  Fn Project CLI you can create an Fn Project CLI Context to Connect to Oracle Cloud Infrastructure and specify -- provider oracle This option enables Oracle Functions to perform authentication and authorization using Oracle Cloud Infrastructure request signing, private keys, user groups, and policies that grant permissions to those user groups.

• Question 35:

  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.

  ---

  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 36:

  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

  ---

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

• Question 37:

  Which two statements are true for serverless computing and serverless architectures?

  A. Long running tasks are perfectly suited for serverless
  B. Serverless function state should never be stored externally
  C. Application DevOps team is responsible for scaling
  D. Serverless function execution is fully managed by a third party
  E. Applications running on a FaaS (Functions as a Service) platform
  B. Serverless function state should never be stored externally
  E. Applications running on a FaaS (Functions as a Service) platform

  ---

  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. 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 Applications built with a serverless infrastructure will scale automatically as the user base grows or usage increases. If a function needs to be run in multiple instances, the vendor's servers will start up, run, and end them as they are needed. Oracle Functions is based on Fn Project. Fn Project is an open source, container native, serverless platform that can be run anywhere - any cloud or on-premises. Serverless architectures are not built for long-running processes. This limits the kinds of applications that can cost-effectively run in a serverless architecture. Because serverless providers charge for the amount of time code is running, it may cost more to run an application with long-running processes in a serverless infrastructure compared to a traditional one.

  https://docs.cloud.oracle.com/en-us/iaas/Content/Functions/Concepts/functionsconcepts.htm https://www.cloudflare.com/learning/serverless/why-use-serverless/

• Question 38:

  Which two statements are true for service choreography?

  A. Service choreographer is responsible for invoking other services.
  B. Services involved in choreography communicate through messages/messaging systems.
  C. Service choreography relies on a central coordinator.
  D. Service choreography should not use events for communication.
  E. Decision logic in service choreography is distributed.
  B. Services involved in choreography communicate through messages/messaging systems.
  E. Decision logic in service choreography is distributed.

  ---

  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.

• Question 39:

  You have created a repository in Oracle Cloud Infrastructure Registry in the us-ashburn-1 (iad) region in your tenancy with a namespace called "heyci. Which three are valid tags for an image named "myapp"?

  A. iad.ocir.io/heyoci/myproject/myapp:0.0.1
  B. us-ashburn-l.ocirJo/heyoci/myapp:0.0.2-beta
  C. us-ashburn-l.ocir.io/heyoci/myproject/myapp:0.0.2-beta
  D. us-ashburn-l.ocir.io/myproject/heyoci/myapp:latest
  E. iad.ocir.io/myproject/heyoci/myapprlatest
  F. iad.ocir.io/heyoci/myapp:0.0.2-beta
  G. iad.ocir.io/heyoci/myapp:latest
  A. iad.ocir.io/heyoci/myproject/myapp:0.0.1
  F. iad.ocir.io/heyoci/myapp:0.0.2-beta
  G. iad.ocir.io/heyoci/myapp:latest

  ---

  Give a tag to the image that you're going to push to Oracle Cloud Infrastructure Registry by entering:

  docker tag

  where:

  uniquely identifies the image, either using the image's id (for example, 8e0506e14874), or the image's name and tag separated by a colon (for example, acme- web-app:latest).

  is in the format .ocir.io///: where:

  is the key for the Oracle Cloud Infrastructure Registry region you're using. For example, iad. See Availability by Region. ocir.io is the Oracle Cloud Infrastructure Registry name. is the auto-generated

  Object Storage namespace string of the tenancy that owns the repository to which you want to push the image (as shown on the Tenancy Information page). For example, the namespace of the acme-dev tenancy might be ansh81vru1zp.

  Note that for some older tenancies, the namespace string might be the same as the tenancy name in all lower-case letters (for example, acme-dev). Note also that your user must have access to the tenancy.

  (if specified) is the name of a repository to which you want to push the image (for example, project01). Note that specifying a repository is optional (see About Repositories). is the name you want to give the

  image in Oracle Cloud Infrastructure Registry (for example, acme-web-app).

  is an image tag you want to give the image in Oracle Cloud Infrastructure Registry (for example, version2.0.test).

  For example, for convenience you might want to group together multiple versions of the acme-web- app image in the acme-dev tenancy in the Ashburn region into a repository called project01. You do this by including the name of the

  repository in the image name when you push the image, in the format .ocir.io///:. For example, iad.ocir.io/ansh81vru1zp/project01/acme-web-app:4.6.3. Subsequently,

  when you use the docker push command, the presence of the repository in the image's name ensures the image is pushed to the intended repository. If you push an image and include the name of a repository that doesn't already exist, a new

  private repository is created automatically. For example, if you enter a command like docker push iad.ocir.io/ansh81vru1zp/project02/acme-web- app:7.5.2 and the project02 repository doesn't exist, a private repository called project02 is

  created automatically. If you push an image and don't include a repository name, the image's name is used as the name of the repository. For example, if you enter a command like docker push iad.ocir.io/ansh81vru1zp/acme-web-app:7.5.2

  that doesn't contain a repository name, the image's name (acme-web-app) is used as the name of a private repository. https:// docs.cloud.oracle.com/en-us/iaas/Content/Registry/Concepts/registrywhatisarepository.htm

• Question 40:

  With the volume of communication that can happen between different components in cloud-native applications, it is vital to not only test functionality, but also service resiliency. Which statement is true with regards to service resiliency?

  A. Resiliency is about recovering from failures without downtime or data loss.
  B. A goal of resiliency is not to bring a service to a functioning state after a failure.
  C. Resiliency testing can be only done in a test environment.
  D. Resiliency is about avoiding failures.
  D. Resiliency is about avoiding failures.

  ---

  Resiliency and Availability

  Resiliency and availability refers to the ability of a system to continue operating, despite the failure or sub-optimal performance of some of its components.

  In the case of Oracle Functions:

  The control plane is a set of components that manages function definitions. The data plane is a set of components that executes functions in response to invocation requests. For resiliency and high availability, both the control plane and data plane components are distributed across different availability domains and fault domains in a region. If one of the domains ceases to be available, the components in the remaining domains take over to ensure that function definition management and execution are not disrupted. When functions are invoked, they run in the subnets specified for the application to which the functions belong. For resiliency and high availability, best practice is to specify a regional subnet for an application (or alternatively, multiple AD-specific subnets in different availability domains). If an availability domain specified for an application ceases to be available, Oracle Functions runs functions in an alternative availability domain.