[Q16-Q40] Latest 1Z0-1084-21 Exam with Accurate Oracle Cloud Infrastructure Developer 2021 Associate PDF Questions [Dec 13, 2022]

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[Dec 13, 2022] Latest 1Z0-1084-21 Exam with Accurate Oracle Cloud Infrastructure Developer 2021 Associate PDF Questions

Practice To 1Z0-1084-21 – DumpsMaterials Remarkable Practice On your Oracle Cloud Infrastructure Developer 2021 Associate Exam

Oracle 1Z0-1084-21 Exam Syllabus Topics:

Topic	Details
Topic 1	Explain the Challenges of testing in Cloud Native world Describe Service Communication Patterns
Topic 2	Overcome Security challenges with Cloud Native Discuss the Meaning of Serverless Computing
Topic 3	Securing Cloud Native Applications Use the Defense-in-depth approach
Topic 4	Perform Tasks around Monitoring, Observability, and Alerting Explain Distributed Computing
Topic 5	Develop Serverless Application with Oracle Functions Develop Microservices and Applications for OKE

QUESTION 16
In a Linux environment, what is the default locations of the configuration file that Oracle Cloud Infrashtructure CLI uses for profile information/

/etc/.oci/config

/usr/local/bin/config

SHOME/.oci/config

/usr/bin/oci/config

QUESTION 17
Which one of the statements describes a service aggregator pattern?

It isimplemented 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

QUESTION 18
You need to execute a script on a remote instance through Oracle Cloud Infrastructure Resource Manager.
Which option can you use?

Use /bin/sh with the full path to the location of thescript to execute the script.

It cannot be done.

Download the script to a local desktop and execute the script.

Use remote-exec

QUESTION 19
As a cloud-native developer, you have written a web service for your company. You have used Oracle Cloud Infrastructure (OCI) API Gateway service to expose the HTTP backend. However, your security team has suggested that your web service should handle Distributed Denial-of-Service (DDoS) attack. You are time-constrained and you need to make sure that this is implemented as soon as possible.
What should you do in this scenario?

Use OCI virtual cloud network (VCN) segregation to control DDoS.

Use a third party service integration to implement a DDoS attack mitigation,

Use OCI API Gateway service and configure rate limiting.

Re-write your web service and implement rate limiting.

QUESTION 20
Which one of the following is NOT a valid backend-type supported by Oracle Cloud Infrastructure (OCI) API Gateway?

STOCK_RESPONSE_BACKEND

ORACLE_FUNCTIONS_BACKEND

ORACLE_STREAMS_BACKEND

HTTP_BACKEND

QUESTION 21
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?

OCI Compute

OCI Container Engine for Kubernetes

OCI Resource Manager

OCI API Gateway

QUESTION 22
You are developing a polyglot serverless application using Oracle Functions. Which language cannot be used to write your function code?

PL/SQL

Python

Node.js

Java

QUESTION 23
Which two statements accurately describe Oracle SQL Developer Web on Oracle Cloud Infrastructure (OCI) Autonomous Database?

It is available for databases with dedicated Exadata infrastructure only.

After provisioning into an OCI compute Instance, it can automatically connect to the OCI Autonomous Databases instances.

It is available for databases with both dedicated and shared Exadata infrastructure.

It provides a development environment and a data modeler interface for OCI Autonomous Databases.

It must be enabled via OCI Identity and Access Management policy to get access to the Autonomous Databases instances.

QUESTION 24
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

QUESTION 25
Which is NOT a supported SDk Oracle Cloud Infrastructure (OCI)?

Go SDK

Java SDK

NET SDK

Ruby SDK

Python SDK

QUESTION 26
Which two are characteristics of microservices?

Microservices are hard to test in isolation.

Microservicescan be independently deployed.

All microservices share a data store.

Microservices can be implemented in limited number of programming languages.

Microservices communicate over lightweight APIs.

QUESTION 27
What is one of the differences between a microservice and a serverless function?

Microservices are used for long running operations and serverless functions for short running operations.

Microservices always use a data storeand serverless functions never use a data store.

Microservices are stateless and serverless functions are stateful.

Microservices are triggered by events and serverless functions are not.

QUESTION 28
Your Oracle Cloud Infrastructure Container Engine for Kubernetes (OKE) administrator has created an OKE cluster with one node pool in a public subnet. You have been asked to provide a log file from one of the nodes for troubleshooting purpose.
Which step should you take to obtain the log file?

ssh into the node using public key.

ssh into the nodes using private key.

It is impossible since OKE is a managed Kubernetes service.

Use the username open and password to login.

QUESTION 29
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

QUESTION 30
You created a pod called “nginx” and its state is set to Pending.
Which command can you run to see the reason why the “nginx” pod is in the pending state?

kubect2 logs pod nginx

kubect2 describe pod nginx

kubect2 get pod nginx

Through the Oracle Cloud Infrastructure Console

QUESTION 31
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.

QUESTION 32
A developer using Oracle Cloud Infrastructure (OCI) API Gateway must authenticate the API requests to their web application. The authentication process must be implementedusing a custom scheme which accepts string parameters from the API caller. Which method can the developer use In this scenario?

Create an authorizer function using request header authorization.

Create an authorizer function using token-based authorization.

Create a cross account functions authorizer.

Create an authorizer function using OCI Identity and Access Management based authentication

Explanation
Using Authorizer Functions to Add Authentication and Authorization to API Deployments:
You can control access to APIs you deploy to API gateways using an ‘authorizer function’ (as described in this topic), or using JWTs (as described in Using JSON Web Tokens (JWTs) to Add Authentication and Authorization to API Deployments).
You can add authentication and authorization functionality to API gateways by writing an ‘authorizer function’ that:
1. Processes request attributes to verify the identity of a caller with an identity provider.
2.Determines the operations that the caller is allowed to perform.
3.Returns the operations the caller is allowed to perform asa list of ‘access scopes’ (an ‘access scope’ is an arbitrary string used to determine access).
Optionally returns a key-value pair for use by the API deployment. For example, as a context variable for use in an HTTP back end definition (see Adding Context Variables to Policies and HTTP Back End Definitions).
Create an authorizerfunction using request header authorization implemented using a custom scheme which accepts string parameters from the API caller.
Managing Input Parameters
In our case we will need to manage quite a few static parameters in our code. For example the URLs of the secrets service endpoints, the username and other constant parameterised data. We can manage these either at Application or Function level (an OCI Function is packaged in an Application which can contain multiple Functions). In this case I will create function level parameters. You can use the following command to create the parameters:
fn config function test idcs-assert idcsClientId aedc15531bc8xxxxxxxxxxbd8a193

References:
https://technology.amis.nl/2020/01/03/oracle-cloud-api-gateway-using-an-authorizer-function-for-client-secret-a
https://docs.cloud.oracle.com/en-us/iaas/Content/APIGateway/Tasks/apigatewayusingauthorizerfunction.htm
https://www.ateam-oracle.com/how-to-implement-an-oci-api-gateway-authorization-fn-in-nodejs-that-accesses-o

QUESTION 33
What is thecommunication method between different Cloud native applications services?

Complex and asynchronous

Basic and synchronous

Complex and synchronous

Basic and asynchronous

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

QUESTION 34
Which two handle Oracle Functionsauthentication automatically?

Oracle Cloud Infrastructure SDK

cURL

Oracle Cloud Infrastructure CLl

Signed HTTP Request

Fn Project CLI

QUESTION 35
Which is NOT a supported SDK on Oracle Cloud Infrastructure (OCI)?

Ruby SDK

Java SDK

Python SDK

Go SDK

.NET SDK

QUESTION 36
Which header is NOT required when signing GET requests to Oracle Cloud Infrastructure APIs?

date or x-date

(request-target)

content-type

host

QUESTION 37
How do you perform a rolling update in Kubernetes?

kubect1 rolling-update

kubect1 upgrade <deployment-name> -image=*image:v2

kubect1 update -c <container>

kubect1 rolling-update <deployment-name> -image=image

QUESTION 38
Which two statements accurately describe an Oracle Functions application?

Asmall block of code invoked in response to an Oracle Cloud Infrastructure (OCI) Events service

A Docker image containing all the functions that share the same configuration

An application based on Oracle Functions, Oracle Cloud Infrastructure (OCI) Events and OCI API Gateway services

A common context to store configuration variables that are available to all functions in the application

A logical group of functions

QUESTION 39
You are using Oracle Cloud Infrastructure (0CI) Resource Manager to manage your infrastructure lifecycle and wish to receive an email each time a Terraform action begins.
How should you use the OCI Events service to do this without writing any code?

Create an OCI Notifications topic and email subscription with the destination email address. Then create an OCI Events rule matching “Resource Manager Stack – Update” condition, and select the notification topic for the corresponding action.

Create an OCI Notification topic and email subscription with the destination email address. Then create an OCI Events rule matching “Resource Manager job – Create” condition, and select the notification topic for the corresponding action.

Create a rule in OCI Events service matching the “Resource Manager Stack – Update” condition. Then select “Action Type: Email” and provide the destination email address.

Create an OCI Email Delivery configuration with thedestination email address. Then create an OCI Events rule matching “Resource Manager Job – Create” condition, and select the email configuration for the corresponding action.

QUESTION 40
Which two arerequired 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