[Sep-2022] 1Z0-1084-21 Braindumps – 1Z0-1084-21 Questions to Get Better Grades
1Z0-1084-21 Exam Dumps - Try Best 1Z0-1084-21 Exam Questions - PDFDumps
Oracle 1Z0-1084-21 Exam Syllabus Topics:
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NEW QUESTION 41
You have two microservices, A and B running in production. Service A relies on APIs fromservice 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 using API mocks.
- B. There is no need to explicitly test APIs.
- C. Test against production APIs.
- D. Test the APIs in private environments.
Answer: A
Explanation:
Explanation
Best Practices: API Mocking:
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 The most common term for creating simulated components is , but others are also used, and partly apply to different things; stubbing, simulation, and virtualization. The basic concept is the same - instead of using an actual software component (an API in our case) - a "replacement" version of that API is created and used instead. It behaves as the original API, but lacks many of the functional and non-functional characteristics of the original component. Which term is applicable depends on the degree to which the mock-up corresponds to the actual API:
Stubbing: mostly a placeholder without real functionality
Mocking: basic functionality required for a specific testing or development purpose Simulation: complete functionality for testing or development purposes Virtualization: imulation that is deployed into an operational, manageable and controllable environment
References:
https://docs.oracle.com/en/solutions/build-governance-app-oracle-paas/test-custom-apis.html
https://www.soapui.org/learn/mocking/what-is-api-mocking/
NEW QUESTION 42
You are developing a serverless application with Oracle Functions and Oracle Cloud Infrastructure Object Storage- Your function needs to read a JSON file object from an Object Storage bucket named"input-bucket" in compartment "qa-compartment". Your corporate security standards mandate the use of Resource Principals for this use case.
Which two statements are needed to implement this use case?
- A. No policies are needed. By default, every function has read access to Object Storage buckets in the tenancy
- B. Set up a policy to grant all functions read access to the bucket:
allow all functions in compartment qa-compartment to read objects in target.bucket.name='input-bucket' - C. Set up the following dynamic group for your function's OCID: Name: read-file-dg Rule: resource. id = ' ocid1. f nf unc. ocl -phx. aaaaaaaakeaobctakezj z5i4uj j 7g25q7sx5mvr55pms6f
4da ! - D. Set up a policy with the following statement to grant read access to the bucket:
allow dynamic-group read-file-dg to read objects in compartment qa-compartment where target .bucket
.name=' input-bucket * - E. Set up a policy to grant your user account read access to the bucket:
allow user XYZ to read objects in compartment qa-compartment where target .bucket, name-'input-bucket'
Answer: C,D
Explanation:
Explanation
When a function you've deployed to Oracle Functions is running, it can access other Oracle Cloud Infrastructure resources. For example:
- You might want a function to get alist of VCNs from the Networking service.
- You might want a function to read data from an Object Storage bucket, perform some operation on the data, and then write the modified data back to the Object Storage bucket.
To enable a function to access anotherOracle Cloud Infrastructure resource, you have to include the function in a dynamic group, and then create a policy to grant the dynamic group access to that resource.
https://docs.cloud.oracle.com/en-us/iaas/Content/Functions/Tasks/functionsaccessingociresources.htm
NEW QUESTION 43
What can you use to dynamically make Kubernetes resources discoverable topublic DNS servers?
- A. CoreDNS
- B. ExternalDNS
- C. DynDNS
- D. kubeDNS
Answer: B
Explanation:
Explanation
Setting up ExternalDNS for Oracle Cloud Infrastructure (OCI):
Inspired by Kubernetes 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 the Kubernetes API to determine a desired listof DNS records.
In a broader sense, ExternalDNS allows you to control DNS records dynamically via Kubernetes resources in a DNS provider-agnostic way Deploy ExternalDNS Connect your kubectl client 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
NEW QUESTION 44
What is thecommunication method between different Cloud native applications services?
- A. Basic and asynchronous
- B. Complex and synchronous
- C. Basic and synchronous
- D. Complex and asynchronous
Answer: A
Explanation:
Explanation
What Is Cloud Native?
Cloud native technologies arecharacterized 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 developmentand 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 always synchronous and 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, a longseries 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.
Queues implement an asynchronous, point-to-point messaging pattern.
Events
Message queuing is an effective way to implement communication where a producer can asynchronously send 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
NEW QUESTION 45
Which two arerequired to enable Oracle Cloud Infrastructure (OCI) Container Engine for Kubernetes (OKE) cluster access from the kubect1 CLI?
- A. A configured OCI API signing key pair
- B. An SSH key pair with the public key added to cluster worker nodes
- C. Install and configure the OCI CLI
- D. Tiller enabled on the OKE cluster
- E. OCI Identity and Access Management Auth Token
Answer: A,C
Explanation:
Explanation
Setting Up Local Access to Clusters
To set up a kubeconfig file to enable access to a cluster using a local installation of kubectl and theKubernetes Dashboard:
Step 1: Generate an API signing key pair
Step 2: Upload the public key of the API signing key pair
Step 3: Install and configure the Oracle Cloud Infrastructure CLI
Step 4: Set up the kubeconfig file
Step 5: Verify that kubectl can access the cluster
References:
https://docs.cloud.oracle.com/en-us/iaas/Content/ContEng/Tasks/contengdownloadkubeconfigfile.htm
NEW QUESTION 46
You have deployed a Python application on Oracle Cloud Infrastructure Container Engine for Kubernetes.
However, during testing you found a bug that you rectified and created a new Docker image. You need to make sure that if this new Image doesn't work then you can roll back to the previous version.
Using kubectl, which deployment strategies should you choose?
- A. Rolling Update
- B. A/B Testing
- C. Canary Deployment
- D. Blue/Green Deployment
Answer: D
Explanation:
Explanation
Using Blue-Green Deployment to Reduce Downtime and Risk:
>Blue-green deployment is a technique that reduces downtime and risk by running two identical production environments called Blue and Green. At any time, only one of the environments is live, with the live environment serving all production traffic. For this example, Blue is currently live and Green is idle.
This technique can eliminate downtime due to app deployment. In addition, blue-green deployment reduces risk: if something unexpected happens with your new version on Green, you can immediately roll back to the last version by switching back to Blue.
>Canary deployments are a pattern for rolling out releases to a subset of users or servers. The idea is to first deploy the change to a small subset of servers, test it, and then roll the change out to the rest of the servers.
The canary deployment serves as an early warning indicator with less impact on downtime: if the canary deployment fails, the rest of the servers aren't impacted.
>A/B testing is a way to compare two versions of a singlevariable, typically by testing a subject's response to variant A against variant B, and determining which of the two variants is more effective
>Rolling update offers a way to deploy the new version of your application gradually across your cluster.
References:
https://docs.cloudfoundry.org/devguide/deploy-apps/blue-green.html
NEW QUESTION 47
Which is NOT a supported SDK on Oracle Cloud Infrastructure (OCI)?
- A. Go SDK
- B. Python SDK
- C. .NET SDK
- D. Ruby SDK
- E. Java SDK
Answer: C
Explanation:
Explanation
https://docs.cloud.oracle.com/en-us/iaas/Content/API/Concepts/sdks.htm
NEW QUESTION 48
Which two are characteristics of microservices?
- A. All microservices share a data store.
- B. Microservices communicate over lightweight APIs.
- C. Microservicescan be independently deployed.
- D. Microservices are hard to test in isolation.
- E. Microservices can be implemented in limited number of programming languages.
Answer: B,C
Explanation:
Explanation
Learn About the Microservices Architecture
If you want to design an application that is multilanguage, easily scalable, easy to maintain and deploy, highly available, and that minimizes failures, then use the microservices architecture to design and deploy a cloud application.
In a microservicesarchitecture, each microservice owns a simple task, and communicates with the clients or with other microservices by using lightweight communication mechanisms such as REST API requests.
The following diagram shows the architecture of an application thatconsists of multiple microservices.
Microservices enable you to design your application as a collection of loosely coupled services. Microservices follow the share-nothing model, and run as stateless processes. This approach makes it easier to scale andmaintain the application.
The API layer is the entry point for all the client requests to a microservice. The API layer also enables the microservices to communicate with each other over HTTP, gRPC, and TCP/UDP.
The logic layer focuses on a single business task, minimizing the dependencies on the other microservices.
This layer can be written in a different language for each microservice.
The data store layer provides a persistence mechanism, such as a database storage engine, log files, and so on.
Consider using a separate persistent data store for each microservice.
Typically, each microservice runs in a container that provides a lightweight runtime environment.
Loosely coupled with other services - enables a team to work independently the majority of time on their service(s) without being impacted by changes to other services and without affecting other services
References:
https://docs.oracle.com/en/solutions/learn-architect-microservice/index.html
https://microservices.io/patterns/microservices.html
https://www.techjini.com/blog/microservices/
NEW QUESTION 49
In order to effectively test your cloud-native applications, you might utilize separate environments (development, testing, staging, production, etc.). Which Oracle Cloud Infrastructure (OC1) service can you use to create and manage your infrastructure?
- A. OCI Compute
- B. OCI API Gateway
- C. OCI Resource Manager
- D. OCI Container Engine for Kubernetes
Answer: C
Explanation:
Explanation
Resource Manager is an Oracle Cloud Infrastructure service that allows you to automate the process of provisioning your Oracle Cloud Infrastructure resources. Using Terraform, Resource Manager helps you install, configure, and manage resources through the "infrastructure-as-code" model.
References:
https://docs.cloud.oracle.com/iaas/Content/ResourceManager/Concepts/resourcemanager.htm
NEW QUESTION 50
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 oci-cli-rc -file path/to/target/file
- B. Run oci setup keys and provide your credentials
- C. Run oci session refresh -profile <profile_name>
- D. Run oci session authenticate and provide your credentials
Answer: D
Explanation:
Explanation
Token-based authentication for the CLI:
Token-based authentication for the CLI allows customers to authenticate their session interactively, then use theCLI 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 authenticationfor the CLI on a computer with a web browser:
1. In the CLI, run the following command. This will launch a web browser.
oci session authenticate
2. In the browser, enter your user credentials. This authentication information is saved to the .config file.
Validating a Token
To verify that a token is valid, run the following command:
oci session validate --config-file <path_to_config_file> --profile <profile_name> --auth security_token You should receive a message showing the expiration date for the session.If you receive an error, check your profile settings.
References:
https://docs.cloud.oracle.com/en-us/iaas/Content/API/SDKDocs/clitoken.htm
NEW QUESTION 51
You have written a Node.js function and deployed it to Oracle Functions. Next, you need to call this function from a microservicewritten 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. Use the OCI Java SDK to invoke the function from the microservice.
- C. Oracle Functions does not allow a microservice deployed on OKE to invoke a function.
- D. OKE does not allow a microservice to invoke a function from Oracle Functions.
Answer: B
Explanation:
Explanation
Invoking Functions
You can invoke a functionthat you've deployed to Oracle Functions in different ways:
1. Using the Fn Project CLI.
2. Using the Oracle Cloud Infrastructure CLI.
3. Using the Oracle Cloud Infrastructure SDKs.
4. Making a signed HTTP request to the function's invoke endpoint. Every function has an invoke endpoint.
Using the Fn Project CLI to Invoke Functions
To invoke a function deployed to Oracle Functions using the Fn Project CLI:
Log in to your development environment as a functions developer.
In a terminal window, enter:
$ fn invoke <app-name> <function-name>
Using SDKs to Invoke Functions:
If you're writing a program to invoke a function in a language for which an Oracle Cloud Infrastructure SDK exists, Oracle recommends you use that SDK to send API requests to invoke thefunction. Among other things, the SDK will facilitate Oracle Cloud Infrastructure authentication.
References:
https://docs.cloud.oracle.com/en-us/iaas/Content/Functions/Tasks/functionsinvokingfunctions.htm
NEW QUESTION 52
Which two statements are true for service choreography?
- A. Services involved in choreography communicate through messages/messaging systems.
- B. Decision logic in service choreography is distributed.
- C. Service choreographer is responsible for invoking other services.
- D. Service choreography should not useevents for communication.
- E. Service choreography relies on a central coordinator.
Answer: A,B
Explanation:
Explanation
Service Choreography
Service choreography is a global description of the participating services, which is defined by exchange of messages, rules of interactionand 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.
References:
https://stackoverflow.com/questions/4127241/orchestration-vs-choreography/33316988
NEW QUESTION 53
Which testingapproaches is a must for achieving high velocity of deployments and release of cloud-native applications?
- A. Automated testing
- B. A/B testing
- C. Integration testing
- D. Penetration testing
Answer: A
Explanation:
Explanation
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 orblue-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.
References:
https://docs.cloud.oracle.com/en-us/iaas/Content/API/Concepts/devopstools.htm
NEW QUESTION 54
A service you are deploying to Oracle infrastructure (OCI) Container En9ine for Kubernetes (OKE) uses a docker image from a private repository Which configuration is necessary to provide access to this repository from OKE?
- A. Create a docker-registry secret for OCIR with identity Auth Token on the cluster, and specify the image pull secret property in the application deployment manifest.
- B. Create a docker-registry secret for OCIR with API key credentials on the cluster, and specify the imagepullsecret property in the applicationdeployment manifest.
- C. Add a generic secret on the cluster containing your identity credentials. Then specify a registrycredentials property in the deployment manifest.
- D. Create a dynamic group for nodes in the cluster, and a policy that allows the dynamic group to read repositories in the same compartment.
Answer: A
Explanation:
Explanation
Pulling Images from Registry during Deployment
During the deployment of an application to a Kubernetes cluster, you'll typically want one or more images to be pulled from a Docker registry. In the application's manifest file you specify the images to pull, the registry to pull them from, and the credentials to use when pulling the images. The manifest file is commonly also referred to as a pod spec, or as a deployment.yaml file (although other filenames are allowed).
If you want the application to pull images that reside in Oracle Cloud Infrastructure Registry, you have to perform two steps:
- You have to use kubectl to create a Docker registry secret. The secret containsthe Oracle Cloud Infrastructure credentials to use when pulling the image. When creating secrets, Oracle strongly recommends you use the latest version of kubectl To create a Docker registry secret:
1- If you haven't already done so, follow the steps to set up the cluster's kubeconfig configuration file and (if necessary) set the KUBECONFIG environment variable to point to the file. Note that you must set up your own kubeconfig file. You cannot access a cluster using a kubeconfig file that a different userset up.
2- In a terminal window, enter:
$ kubectl create secret docker-registry <secret-name> --docker-server=<region-key>.ocir.io
--docker-username='<tenancy-namespace>/<oci-username>' --docker-password='<oci-auth-token>'
--docker-email='<email-address>'
where:
<secret-name> is a name of your choice, that you will use in the manifest file to refer to the secret . For example, ocirsecret
<region-key> 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.
<tenancy-namespace> is the auto-generated Object Storage namespace string of the tenancy containing the repository from which the application is to pull 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, thenamespace string might be the same as the tenancy name in all lower-case letters (for example, acme-dev).
<oci-username> is the username to use when pulling the image. The username must have access to the tenancy specified by <tenancy-name>. For example, [email protected] . If your tenancy is federated with Oracle Identity Cloud Service, use the format oracleidentitycloudservice/<username>
<oci-auth-token> is the auth token of the user specified by <oci-username>. For example, k]j64r{1sJSSF-;)K8
<email-address> is an email address. An email address is required, but it doesn't matter what you specify. For example, [email protected]
- You have to specify the image to pull from Oracle Cloud Infrastructure Registry, including the repository location and the Dockerregistry secret to use, in the application's manifest file.
References:
https://docs.cloud.oracle.com/en-us/iaas/Content/Registry/Tasks/registrypullingimagesfromocir.htm
NEW QUESTION 55
Which Oracle Cloud Infrastructure (OCI) load balancer shape is used by default in OCI container Engineer for Kubernetes?
- A. 8000 Mbps
- B. There is no default. The shape has to be specified.
- C. 400 Mbps
- D. 100 Mbps
Answer: D
Explanation:
Explanation
Specifying Alternative Load Balancer Shapes
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.
SHAPE
A template that determines the load balancer's total pre-provisioned maximum capacity (bandwidth) for ingress plus egress traffic. Available shapes include 10Mbps, 100 Mbps, 400 Mbps, and 8000 Mbps.
References:
https://docs.cloud.oracle.com/en-us/iaas/Content/ContEng/Tasks/contengcreatingloadbalancer.htm
https://docs.cloud.oracle.com/en-us/iaas/Content/Balance/Concepts/balanceoverview.htm
NEW QUESTION 56
You are building a cloud native, serverless travel application with multiple Oracle Functions in Java, Python and Node.js. You need to build and deploy these functions to a single applications named travel-app.
Which command will help you complete this task successfully?
- A. fn -v deploy --ap travel-ap -- all
- B. oci fn application --application-name-ap deploy --all
- C. fn function deploy --all --application-name travel-ap
- D. oci fn function deploy --ap travel-ap --all
Answer: A
Explanation:
Explanation
To get started with Oracle Functions:
Creating, Deploying, and Invoking a Helloworld Function
Step 6- Changedirectory to the newly created helloworld-func directory.
Step 7- Enter the following single Fn Project command to build the function and its dependencies as a Docker image called helloworld-func, push the image to the specified Docker registry, and deploythe function to Oracle Functions in the helloworld-app:
$ fn -v deploy --app helloworld-app
The -v option simply shows more detail about what Fn Project commands are doing (see Using the Fn Project CLI with Oracle Functions).
References:
https://docs.cloud.oracle.com/en-us/iaas/Content/Functions/Tasks/functionscreatingfirst.htm
NEW QUESTION 57
Which two are benefits of distributed systems?
- A. Resiliency
- B. Ease of testing
- C. Scalability
- D. Security
- E. Privacy
Answer: A,C
Explanation:
Explanation
distributed systems of native-cloud like functions that have a lot of benefit like Resiliency and availability Resiliency andavailability 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.
Thedata 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 ina 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 theapplication 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 domainspecified for an application ceases to be available, Oracle Functions runs functions in an alternative availability domain.
Concurrency and Scalability
Concurrency refers to the ability of a system to run multiple operations in parallel using shared resources.
Scalability refers to the ability of the system to scale capacity (both up and down) to meet demand.
In the case of Functions, when a function is invoked for the first time, the function's image is run as a container on an instance in a subnetassociated with the application to which the function belongs. When the function is executing inside the container, the function can read from and write to other shared resources and services running in the same subnet (for example, Database as a Service).The function can also read from and write to other shared resources (for example, Object Storage), and other Oracle Cloud Services.
If Oracle Functions receives multiple calls to a function that is currently executing inside a running container, Oracle Functions automatically and seamlessly scales horizontally to serve all the incoming requests. Oracle Functions starts multiple Docker containers, up to the limit specified for your tenancy. The default limit is 30 GB of RAM reserved for function execution per availability domain, although you can request an increase to this limit. Provided the limit is not exceeded, there is no difference in response time (latency) between functions executing on the different containers.
NEW QUESTION 58
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. Use OCI Events service and OCI Notification service to send an email each time a file is created.
- B. Schedule an Oracle Function that checks the OCI Object Storage bucket every minute and emails the customer when a file is found.
- C. Schedule an Oracle Function that checks the OCI Object Storage bucket every second and emails the customer when a file is found.
- D. Schedule a cron job that monitors the OCI Object Storage bucket and emails the customerwhen a new file is created.
Answer: A
Explanation:
Explanation
Oracle Cloud Infrastructure Events enables you to create automation based on the state changes of resourcesthroughout 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
References:
https://docs.cloud.oracle.com/en-us/iaas/Content/Events/Concepts/eventsoverview.htm
https://docs.cloud.oracle.com/en-us/iaas/Content/Notification/Concepts/notificationoverview.htm
NEW QUESTION 59
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-shape: 400Mbps
- C. service, beta, kubernetes. lo/oci-load-balancer-value: 4 00Mbps
- D. service . beta . kubernetes . lo/oci-load-balancer-size: 400Mbps
Answer: B
Explanation:
Explanation
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, including400Mbps 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: <value>
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
NEW QUESTION 60
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.)
- A. /usr/local/bin/con
- B. /etc/.oci/con
- C. /usr/bin/oci/con
- D. $HOME/.oci/con
Answer: D
Explanation:
Explanation
Before using Oracle Functions, you must have an Oracle Cloud Infrastructure CLI configuration file that contains the credentials of the user accountthat 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%20d
https://docs.cloud.oracle.com/en-us/iaas/Content/API/SDKDocs/cliconfigure.htm
NEW QUESTION 61
Which pattern can help you minimize the probability of cascading failures in your system during partial loss of connectivity or a complete service failure?
- A. Compensating transaction pattern
- B. Retry pattern
- C. Circuit breaker pattern
- D. Anti-corruption layer pattern
Answer: C
Explanation:
Explanation
A cascading failure is a failure that grows over time as a result of positive feedback. It can occur when a portion of an overall system fails, increasing theprobability that other portions of the system fail.
the circuit breaker pattern prevents the service from performing an operation that is likely to fail. For example, a client service can use a circuit breaker to prevent further remote calls over the network when a downstream service is not functioning properly. This can also prevent the network from becoming congested by a sudden spike in failed retries by one service to another, and it can also prevent cascading failures. Self-healing circuit breakers check the downstream service at regular intervals and reset the circuit breaker when the downstream service starts functioning properly.
https://blogs.oracle.com/developers/getting-started-with-microservices-part-three
NEW QUESTION 62
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