AWS Cloud Practitioner Q5

#1 Which AWS service can be used to prepare and load data for analytics using an extract, transform and load (ETL) process?

• AWS Lambda

• AWS Glue

• Amazon EMR

• Amazon Athena

Answer explanation

AWS Glue is a fully managed extract, transform, and load (ETL) service that makes it easy for customers to prepare and load their data for analytics. You can point AWS Glue to data stored on AWS, and AWS Glue discovers the data and stores the associated metadata (e.g. table definition and schema) in the AWS Glue Data Catalog. Once cataloged, the data is immediately searchable, queryable, and available for ETL

#2 Which AWS service can be used to send automated notifications to HTTP endpoints?

• Amazon SQS

• Amazon SWF

• Amazon SNS

• Amazon SES

Answer explanation

Amazon Simple Notification Service (Amazon SNS) is a web service that makes it easy to set up, operate, and send notifications from the cloud. SNS can be used to send automated or manual notifications to email, mobile (SMS), SQS, and HTTP endpoints.

#3 Which of the following constitute the five pillars for the AWS Well-Architected Framework? (Select TWO.)

• Operational excellence, security, and reliability

• Operational excellence, elasticity and scalability

• Cost prioritization, and cost optimization

• Data consistency, and cost optimization

• . Performance efficiency, and cost optimization

Answer explanation

The five pillars of the AWS Well-Architected Framework are operational excellence, security, reliability, performance efficiency, and cost optimization

#4 Assuming you have configured them correctly, which AWS services can scale automatically without intervention? (Select TWO.)

• Amazon RDS

• Amazon EC2

• Amazon S3

• Amazon DynamoDB

• Amazon EBS

Answer explanation

Both S3 and DynamoDB automatically scale as demand dictates. In the case of DynamoDB you can either configure the ondemand or provisioned capacity mode. With on-demand capacity mode DynamoDB automatically adjusts the read and write throughput for you. EBS and RDS do not scale automatically. You must intervene to adjust volume sizes and database instance types to scale these resources

#5 Which AWS components aid in the construction of fault-tolerant applications? (Select TWO.)

• Elastic IP addresses

• ARNs

• AMIs

• Tags

• Block device mappings

Answer explanation

Elastic IP addresses can be easily remapped between EC2 instances in the event of a failure. Amazon Machine Images (AMIs) can be used to quickly launch replacement instances when there is a failure Amazon Resource Names (ARNs), tags and block device mappings don’t really help with fault tolerance

#6 A company wants to utilize a pay as you go cloud model for all of their applications without CAPEX costs and which is highly elastic. Which cloud delivery model will suit them best?

• Public

• Private

• Hybrid

• On-premise

Answer explanation

The public cloud is offered under a purely pay as you go model (unless you choose to reserve), and allows companies to completely avoid CAPEX costs. The public cloud is also highly elastic so companies can grow and shrink the applications as demand changes. Private and on-premise clouds are essentially the same, though both could be managed by a third party and even could be delivered under an OPEX model by some vendors. However, they are typically more CAPEX heavy and the elasticity is limited. A hybrid model combines public and private and this company wants to go all in on a single model.

#7 Which of the following are advantages of using the AWS cloud computing over legacy IT? (Select TWO.)

• You are able to pass responsibility for the availability of your application to AWS

• You don't need to worry about over provisioning as you can elastically scale

• You don't need to patch your operating systems

• You can bring new applications to market faster

• You can bring services closer to your end users

Answer explanation

With cloud computing you no longer need to guess about capacity as you can elastically scale. This means you don’t end up overprovisioning but instead react to the load on your servers. You can also be faster and more agile with development and release of applications.

#8 Which AWS services form the app-facing services of the AWS serverless infrastructure? (Select TWO.)

• AWS Step Functions

• AWS Lambda

• Amazon API Gateway

• Amazon DynamoDB

• Amazon EFS

Answer explanation

AWS Lambda and Amazon API Gateway are both app-facing components of the AWS Serverless infrastructure AWS Step Functions is an orchestration service

#9 What is the name of the AWS managed Docker registry service used by the Amazon Elastic Container Service (ECS)?

• Elastic Container Registry

• ECS Container Registry

• Docker Container Registry

• Docker Image Repository

Answer explanation

Amazon Elastic Container Registry (ECR) is a fully-managed Docker container registry that makes it easy for developers to store, manage, and deploy Docker container images. Amazon ECR is integrated with Amazon Elastic Container Service (ECS). Amazon ECR eliminates the need to operate your own container repositories or worry about scaling the underlying infrastructure.

#10 What are two benefits of using AWS Lambda? (Select TWO.)

• No servers to manage

• Integrated snapshots

• Continuous scaling (scale out)

• Flexible operating system choices

• Open source software

Answer explanation

With AWS Lambda you don’t have any servers to manage (serverless). Lambda functions scale out rather than up running multiple invocations of the function in parallel.