OA Exams

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Question 01

Which AWS service enables real-time analysis of streaming data?

a) Amazon Kinesis
b) Amazon RDS
c) AWS Lambda
d) AWS Elastic Beanstalk

Correct Answer: a) Amazon Kinesis

Explanation: Amazon Kinesis enables real-time processing and analysis of streaming data at sca

Question 02

What is the main benefit of using AWS Elastic Beanstalk?

a) Automatic patching
b) Simplified deployment and management of applications
c) Managed database services
d) Automated security scanning

Correct Answer: b) Simplified deployment and management of applications

Explanation: AWS Elastic Beanstalk provides an easy way to deploy, manage, and scale applications without managing the underlying infrastructure.

Question 03

What feature of Amazon RDS allows for data redundancy and automatic failover between different AWS Availability Zones?

a) Multi-AZ deployments
b) DynamoDB Streams
c) Cross-region replication
d) VPC Peering

Correct Answer: a) Multi-AZ deployments

Explanation: Multi-AZ deployments provide enhanced availability by replicating data across multiple AWS Availability Zones.

Question 04

What is the purpose of AWS Trusted Advisor?

a) To provide insights into application performance
b) To offer best practice recommendations to optimize cost, performance, and security
c) To automate resource provisioning
d) To encrypt data in transit

Correct Answer: b) To offer best practice recommendations to optimize cost, performance, and security

Explanation: AWS Trusted Advisor provides real-time recommendations based on best practices to help optimize AWS environments.

Question 05

Which AWS service can be used to create isolated network environments in the cloud?

a) AWS IAM
b) Amazon VPC
c) AWS Direct Connect
d) AWS Auto Scaling

Correct Answer: b) Amazon VPC

Explanation: Amazon Virtual Private Cloud (VPC) allows users to create isolated, customizable network environments.

Question 06

What AWS service provides an infrastructure for building machine learning workflows?

a) AWS Lambda
b) AWS SageMaker
c) Amazon DynamoDB
d) Amazon RDS

Correct Answer: b) AWS SageMaker

Explanation: AWS SageMaker is a fully managed service that enables developers to build, train, and deploy machine learning models.

Question 07

Which Amazon S3 storage class is most suitable for archiving data with the lowest storage costs?

a) S3 Standard
b) S3 Intelligent-Tiering
c) S3 Glacier Deep Archive
d) S3 One Zone-IA

Correct Answer: c) S3 Glacier Deep Archive

Explanation: S3 Glacier Deep Archive is designed for long-term archival storage at the lowest cost.

Question 08

What AWS service helps manage large-scale analytics and data processing workloads using Hadoop and Spark?

a) AWS Glue
b) Amazon Athena
c) Amazon EMR
d) AWS Batch

Correct Answer: c) Amazon EMR

Explanation: Amazon EMR is a cloud-native big data platform that simplifies running large-scale data processing frameworks like Hadoop and Spark.

Question 09

What AWS service offers fully managed search capabilities for custom applications?

a) Amazon Aurora
b) Amazon CloudSearch
c) AWS Batch
d) AWS Lambda

Correct Answer: b) Amazon CloudSearch

Explanation: Amazon CloudSearch is a fully managed service that allows you to configure and manage a scalable search solution for your application.

Question 10

What is the primary function of Amazon Athena?

a) To store data in a structured format
b) To query data stored in S3 using SQL
c) To monitor application logs
d) To create machine learning models

Correct Answer: b) To query data stored in S3 using SQL

Explanation: Amazon Athena is a serverless query service that allows you to analyze data stored in S3 using standard SQL queries.

Question 11

 What AWS service provides centralized identity management and access control?

a) AWS CloudTrail
b) AWS IAM
c) Amazon Cognito
d) Amazon RDS

Correct Answer: b) AWS IAM

Explanation: AWS Identity and Access Management (IAM) enables centralized management of user access and permissions for AWS services.

Question 12

Which AWS service allows the deployment of containerized applications without managing the underlying infrastructure?

a) AWS Lambda
b) Amazon EKS
c) AWS Fargate
d) Amazon RDS

Correct Answer: c) AWS Fargate

Explanation: AWS Fargate allows you to run containers without managing the underlying infrastructure, simplifying container orchestration.

Question 13

What AWS service offers a fully managed key-value NoSQL database?

a) Amazon Aurora
b) Amazon RDS
c) Amazon DynamoDB
d) AWS Glue

Correct Answer: c) Amazon DynamoDB

Explanation: Amazon DynamoDB is a fully managed key-value NoSQL database service for any scale of applications.

Question 14

What AWS service can be used to manage user authentication and access for web and mobile applications?

a) AWS IAM
b) Amazon Cognito
c) Amazon GuardDuty
d) Amazon Macie

Correct Answer: b) Amazon Cognito

Explanation: Amazon Cognito simplifies the management of user authentication and access for web and mobile applications.

Question 15

What AWS service allows the secure transfer of large amounts of data to and from the cloud?

a) AWS Direct Connect
b) Amazon CloudFront
c) AWS Snowball
d) Amazon Route 53

Correct Answer: c) AWS Snowball

Explanation: AWS Snowball is a data transfer service designed for securely transferring large amounts of data to and from AWS.

Question 16

Which AWS service can be used to implement serverless computing workflows?

a) AWS Batch
b) AWS Step Functions
c) AWS Fargate
d) Amazon EC2

Correct Answer: b) AWS Step Functions

Explanation: AWS Step Functions allow you to coordinate serverless workflows by orchestrating AWS Lambda functions and other services.

Question 17

What is the purpose of AWS Shield?

a) To protect web applications from DDoS attacks
b) To optimize resource costs
c) To manage DNS services
d) To scale EC2 instances

Correct Answer: a) To protect web applications from DDoS attacks

Explanation: AWS Shield provides protection against Distributed Denial of Service (DDoS) attacks for applications hosted on AWS.

Question 18

What AWS service helps you identify underutilized resources to optimize costs?

a) AWS CloudTrail
b) AWS Cost Explorer
c) AWS Trusted Advisor
d) Amazon Macie

Correct Answer: c) AWS Trusted Advisor

Explanation: AWS Trusted Advisor offers recommendations on cost optimization by identifying underutilized or idle resources.

Question 19

What is the main benefit of using Amazon EC2 Auto Scaling?

a) To automatically scale EC2 instances based on demand
b) To distribute traffic across instances
c) To encrypt data at rest
d) To provide DNS routing

Correct Answer: a) To automatically scale EC2 instances based on demand

Explanation: Amazon EC2 Auto Scaling ensures that the number of EC2 instances scales automatically based on demand, improving efficiency and performance.

Question 20

What AWS service helps you manage encryption keys for securing data in AWS?

a) Amazon GuardDuty
b) AWS IAM
c) AWS KMS
d) Amazon CloudFront

Correct Answer: c) AWS KMS

Explanation: AWS Key Management Service (KMS) helps manage encryption keys and provides centralized control over the encryption of data in AWS.

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