[Sep-2023] Free 1z0-1084-22 Exam Dumps to Improve Exam Score
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NEW QUESTION # 17
Which two statements are true for service choreography?
- A. Service choreography relies on a central coordinator.
- B. Service choreography should not use events for communication.
- C. Decision logic in service choreography is distributed.
- D. Services involved in choreography communicate through messages/messaging systems.
- E. Service choreographer is responsible for invoking other services.
Answer: C,D
Explanation:
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.
References:
https://stackoverflow.com/questions/4127241/orchestration-vs-choreography/33316988
NEW QUESTION # 18
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. Anti-corruption layer pattern
- B. Compensating transaction pattern
- C. Retry pattern
- D. Circuit breaker pattern
Answer: D
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 the probability 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 # 19
You are tasked with developing an application that requires the use of Oracle Cloud Infrastructure (OCI) APIs to POST messages to a stream in the OCI Streaming service.
Which statement is incorrect?
- A. The Content-Type header must be Set to application/j son
- B. An HTTP 401 will be returned if the client's clock is skewed more than 5 minutes from the server's.
- C. The request does not require an Authorization header.
- D. The request must include an authorization signing string including (but not limited to) x-content-sha256, content-type, and content-length headers.
Answer: C
Explanation:
Authorization Header
The Oracle Cloud Infrastructure signature uses the "Signature" Authentication scheme (with an Authorization header), and not the Signature HTTP header.
Required Credentials and OCIDs
You need an API signing key in the correct format. See Required Keys and OCIDs.
You also need the OCIDs for your tenancy and user. See Where to Get the Tenancy's OCID and User's OCID.
Summary of Signing Steps
In general, these are the steps required to sign a request:
Form the HTTPS request (SSL protocol TLS 1.2 is required).
Create the signing string, which is based on parts of the request.
Create the signature from the signing string, using your private key and the RSA-SHA256 algorithm.
Add the resulting signature and other required information to the Authorization header in the request.
References:
https://docs.cloud.oracle.com/en-us/iaas/Content/Streaming/Concepts/streamingoverview.htm
https://docs.cloud.oracle.com/en-us/iaas/Content/API/Concepts/signingrequests.htm
NEW QUESTION # 20
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 Container Engine for Kubernetes
- C. OCI API Gateway
- D. OCI Resource Manager
Answer: D
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 # 21
Which concepthe following steps reference Console instructionsCloud Infrastructure Resource Manager?
- A. Stack
- B. Job
- C. Queue
- D. Plan
Answer: C
Explanation:
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.
the following steps reference Console instructions
Create a Terraform configuration.
Create a stack.
Run a plan job, which produces an execution plan.
Review the execution plan.
If changes are needed in the execution plan, update the configuration and run a plan job again.
Run an apply job to provision resources.
Review state file and log files, as needed.
You can optionally reapply your configuration, with or without making changes, by running an apply job again.
Optionally, to release the resources running on a stack, run a destroy job.
NEW QUESTION # 22
You are deploying an API via Oracle Cloud Infrastructure (OCI) API Gateway and you want to implement request policies to control access Which is NOT available in OCI API Gateway?
- A. Controlling access to OCI resources
- B. Limiting the number of requests sent to backend services
- C. Enabling CORS (Cross-Origin Resource Sharing) support
- D. Providing authentication and authorization
Answer: A
Explanation:
Adding Request Policies and Response Policies to API Deployment Specifications:
You can control the behavior of an API deployment you create on an API gateway by adding request and response policies to the API deployment specification:
a request policy describes actions to be performed on an incoming request from a caller before it is sent to a back end a response policy describes actions to be performed on a response returned from a back end before it is sent to a caller You can use request policies to:
limit the number of requests sent to back-end services
enable CORS (Cross-Origin Resource Sharing) support
provide authentication and authorization
You can add request and response policies that apply globally to all routes in an API deployment specification, and also (in some cases) request and response policies that apply only to particular routes.
Note the following:
No response policies are currently available.
API Gateway request policies and response policies are different to IAM policies, which control access to Oracle Cloud Infrastructure resources.
You can add request and response policies to an API deployment specification by:
using the Console
editing a JSON file
References:
https://docs.cloud.oracle.com/en-us/iaas/Content/APIGateway/Tasks/apigatewayaddingrequestpolicies.htm
NEW QUESTION # 23
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. $HOME/.oci/con
- B. /etc/.oci/con
- C. /usr/local/bin/con
- D. /usr/bin/oci/con
Answer: A
Explanation:
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
NEW QUESTION # 24
Which two are characteristics of microservices?
- A. Microservices are hard to test in isolation.
- B. All microservices share a data store.
- C. Microservices can be implemented in limited number of programming languages.
- D. Microservices communicate over lightweight APIs.
- E. Microservices can be independently deployed.
Answer: D,E
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 microservices architecture, 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 that consists 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 and maintain 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 # 25
Which is NOT a supported SDK on Oracle Cloud Infrastructure (OCI)?
- A. .NET SDK
- B. Java SDK
- C. Python SDK
- D. Go SDK
- E. Ruby SDK
Answer: A
Explanation:
https://docs.cloud.oracle.com/en-us/iaas/Content/API/Concepts/sdks.htm
NEW QUESTION # 26
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-value: 4 00Mbps
- B. service.beta, kubernetes. lo/oci-load-balancer-kind: 400Mbps
- C. service . beta . kubernetes . lo/oci-load-balancer-size: 400Mbps
- D. service . beta. kubernetes . lo/oci-load-balancer-shape: 400Mbps
Answer: D
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, 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: <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 # 27
Which one of the following is NOT a valid backend-type supported by Oracle Cloud Infrastructure (OCI) API Gateway?
- A. ORACLE_STREAMS_BACKEND
- B. ORACLE_FUNCTIONS_BACKEND
- C. STOCK_RESPONSE_BACKEND
- D. HTTP_BACKEND
Answer: A
Explanation:
In the API Gateway service, a back end is the means by which a gateway routes requests to the back-end services that implement APIs. If you add a private endpoint back end to an API gateway, you give the API gateway access to the VCN associated with that private endpoint.
You can also grant an API gateway access to other Oracle Cloud Infrastructure services as back ends. For example, you could grant an API gateway access to Oracle Functions, so you can create and deploy an API that is backed by a serverless function.
API Gateway service to create an API gateway, you can create an API deployment to access HTTP and HTTPS URLs.
https://docs.cloud.oracle.com/en-us/iaas/Content/APIGateway/Tasks/apigatewayusinghttpbackend.htm API Gateway service to create an API gateway, you can create an API deployment that invokes serverless functions defined in Oracle Functions.
https://docs.cloud.oracle.com/en-us/iaas/Content/APIGateway/Tasks/apigatewayusingfunctionsbackend.htm API Gateway service, you can define a path to a stock response back end
https://docs.cloud.oracle.com/en-us/iaas/Content/APIGateway/Tasks/apigatewayaddingstockresponses.htm
NEW QUESTION # 28
In a Linux environment, what is the default locations of the configuration file that Oracle Cloud Infrashtructure CLI uses for profile information/
- A. /etc/.oci/config
- B. /usr/bin/oci/config
- C. SHOME/.oci/config
- D. /usr/local/bin/config
Answer: C
Explanation:
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.
NEW QUESTION # 29
Which two are required to enable Oracle Cloud Infrastructure (OCI) Container Engine for Kubernetes (OKE) cluster access from the kubect1 CLI?
- A. An SSH key pair with the public key added to cluster worker nodes
- B. Tiller enabled on the OKE cluster
- C. OCI Identity and Access Management Auth Token
- D. A configured OCI API signing key pair
- E. Install and configure the OCI CLI
Answer: D,E
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 the Kubernetes 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 # 30
Which two "Action Type" options are NOT available in an Oracle Cloud Infrastructure (OCI) Events rule definition?
- A. Email
- B. Functions
- C. Slack
- D. Notifications
- E. Streaming
Answer: A,C
Explanation:
Overview of Events
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.
Event Rules must also specify an action to trigger when the filter finds a matching event. Actions are responses you define for event matches. You set up select Oracle Cloud Infrastructure services that the Events service has established as actions. The resources for these services act as destinations for matching events. When the filter in the rule finds a match, the Events service delivers the matching event to one or more of the destinations you identified in the rule. The destination service that receives the event then processes the event in whatever manner you defined. This delivery provides the automation in your environment.
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
NEW QUESTION # 31
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. us-ashburn-l.ocir.io/myproject/heyoci/myapp:latest
- B. iad.ocir.io/heyoci/myapp:latest
- C. iad.ocir.io/heyoci/myproject/myapp:0.0.1
- D. iad.ocir.io/myproject/heyoci/myapprlatest
- E. iad.ocir.io/heyoci/myapp:0.0.2-beta
- F. us-ashburn-l.ocirJo/heyoci/myapp:0.0.2-beta
- G. us-ashburn-l.ocir.io/heyoci/myproject/myapp:0.0.2-beta
Answer: B,C,E
Explanation:
Give a tag to the image that you're going to push to Oracle Cloud Infrastructure Registry by entering:
docker tag <image-identifier> <target-tag>
where:
<image-identifier> 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).
<target-tag> is in the format <region-key>.ocir.io/<tenancy-namespace>/<repo-name>/<image-name>:<tag> where:
<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 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.
<repo-name> (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).
<image-name> is the name you want to give the image in Oracle Cloud Infrastructure Registry (for example, acme-web-app).
<tag> 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 <region-key>.ocir.io/<tenancy-namespace>/<repo-name>/<image-name>:<tag>. 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
NEW QUESTION # 32
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