[Jun-2023] 1z0-1084-22 PDF Dumps Extremely Quick Way Of Preparation [Q17-Q40]

NO.17 What is the communication method between different Cloud native applications services?

Complex and asynchronous

Basic and synchronous

Complex and synchronous

Basic and asynchronous

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 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 long 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. 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

NO.18 You want to push a new image in the Oracle Cloud Infrastructure (OCI) Registry. Which two actions do you need to perform?

Assign a tag via Docker CLI to the image.

Generate an auth token to complete the authentication via Docker CLI.

Generate an API signing key to complete the authentication via Docker CLI.

Assign an OCI defined tag via OCI CLI to the image.

Generate an OCI tag namespace in your repository.

NO.19 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?

oci fn function deploy –ap travel-ap –all

fn -v deploy –ap travel-ap — all

oci fn application –application-name-ap deploy –all

fn function deploy –all –application-name travel-ap

NO.20 Which is NOT a supported SDk Oracle Cloud Infrastructure (OCI)?

Go SDK

Java SDK

NET SDK

Ruby SDK

Python SDK

NO.21 What is the minimum amount of storage that a persistent volume claim can obtain In Oracle Cloud Infrastructure Container Engine for Kubemetes (OKE)?

1 TB

10 GB

1 GB

50 GB

NO.22 Which two are required to enable Oracle Cloud Infrastructure (OCI) Container Engine for Kubernetes (OKE) cluster access from the kubect1 CLI?

An SSH key pair with the public key added to cluster worker nodes

Install and configure the OCI CLI

OCI Identity and Access Management Auth Token

Tiller enabled on the OKE cluster

A configured OCI API signing key pair

NO.23 Which two are benefits of distributed systems?

Privacy

Security

Ease of testing

Scalability

Resiliency

distributed systems of native-cloud like functions that have a lot of benefit like 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.
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 subnet associated 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.

NO.24 You are a consumer of Oracle Cloud Infrastructure (OCI) Streaming service. Which API should you use to read and process the stream?

ListMessages

GetMessages

GetObject

ReadMessages

NO.25 You are developing a distributed application and you need a call to a path to always return a specific JSON content deploy an Oracle Cloud Infrastructure API Gateway with the below API deployment specification.

What is the correct value for type?

STOCK_RESPONSE_BACKEND

CONSTANT_BACKEND

JSON_BACKEND

HTTP_BACKEND

NO.26 Which Oracle Cloud Infrastructure (OCI) load balancer shape is used by default in OCI container Engineer for Kubernetes?

400 Mbps

8000 Mbps

There is no default. The shape has to be specified.

100 Mbps

NO.27 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.)

$HOME/.oci/con

/usr/local/bin/con

/usr/bin/oci/con

/etc/.oci/con

NO.28 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?

Run oci setup keys and provide your credentials

Run oci session refresh -profile <profile_name>

Run oci session authenticate and provide your credentials

Run oci setup oci-cli-rc -file path/to/target/file

NO.29 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?

The request must include an authorization signing string including (but not limited to) x-content-sha256, content-type, and content-length headers.

The Content-Type header must be Set to application/j son

An HTTP 401 will be returned if the client’s clock is skewed more than 5 minutes from the server’s.

The request does not require an Authorization header.

NO.30 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?

Test against production APIs.

Test using API mocks.

There is no need to explicitly test APIs.

Test the APIs in private environments.

NO.31 Which statements is incorrect with regards to the Oracle Cloud Infrastructure (OCI) Notifications service?

Notification topics may be assigned as the action performed by an OCI Events configuration.

OCI Alarms can be configured to publish to a notification topic when triggered.

An OCI function may subscribe to a notification topic.

A subscription can forward notifications to an HTTPS endpoint.

A subscription can integrate with PagerDuty events.

It may be used to receive an email each time an OCI Autonomous Database backup is completed.

NO.32 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?

service.beta, kubernetes. lo/oci-load-balancer-kind: 400Mbps

service, beta, kubernetes. lo/oci-load-balancer-value: 4 00Mbps

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

service . beta . kubernetes . lo/oci-load-balancer-size: 400Mbps

NO.33 You are implementing logging in your services that will be running in Oracle Cloud Infrastructure Container Engine for Kubernetes. Which statement describes the appropriate logging approach?

Each service logs to its own log file.

All services log to an external logging system.

All services log to standard output only.

All services log to a shared log file.

NO.34 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?

Use the OCI CLI with kubect1 to invoke the function from the microservice.

Oracle Functions does not allow a microservice deployed on OKE to invoke a function.

OKE does not allow a microservice to invoke a function from Oracle Functions.

Use the OCI Java SDK to invoke the function from the microservice.

NO.35 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?

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 *

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 !

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’

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’

No policies are needed. By default, every function has read access to Object Storage buckets in the tenancy

NO.36 What is the open source engine for Oracle Functions?

Apache OpenWhisk

OpenFaaS

Fn Project

Knative

NO.37 Which two handle Oracle Functions authentication automatically?

Oracle Cloud Infrastructure SDK

cURL

Oracle Cloud Infrastructure CLl

Signed HTTP Request

Fn Project CLI

NO.38 You are working on a serverless DevSecOps application using Oracle Functions. You have deployed a Python function that uses the Oracle Cloud Infrastructure (OCI) Python SDK to stop any OC1 Compute instance that does not comply with your corporate security standards There are 3 non compliant OCI Compute instances.
However, when you invoke this function none of the instances were stopped. How should you troubleshoot this?

There is no way to troubleshoot a function running on Oracle Functions.

Enable function logging in the OCI console, include some print statements in your function code and use logs to troubleshoot this.

Enable function remote debugging in the OCI console, and use your favorite IDE to inspect the function running on Oracle Functions.

Enable function tracing in the OCI console, and go to OCI Monitoring console to see the function stack trace.

NO.39 Which one of the statements describes a service aggregator pattern?

It is implemented in each service separately and uses a streaming service

It involves implementing a separate service that makes multiple calls to other backend services

It uses a queue on both sides of the service communication

It involves sending events through a message broker

NO.40 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?

Rolling Update

Canary Deployment

Blue/Green Deployment

A/B Testing

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