aws_cloud_practitioner_essentials

Which of the following is TRUE for the AWS Global Infrastructure?

• A.An Availability Zone consists of a single Region.

• B.An Availability Zone consists of two or more Regions.

• C.A Region consists of a single Availability Zone.

• D.A Region consists of two or more Availability Zones.

Answer explanation

The correct response option is D. A Region consists of two or more Availability Zones.

For example, the South America (São Paulo) Region is sa-east-1. It includes three Availability Zones: sa-east-1a, sa-east-1b, and sa-east-1c.

Which factors should be considered when selecting a Region? (Select TWO.)

• A.Compliance with data governance and legal requirements

• B.Proximity to your customers

• C.Access to 24/7 technical support

• D.Ability to assign custom permissions to different users

• E.Access to the AWS Command Line Interface (AWS CLI)

Answer explanation

The correct two response options are:

A. Compliance with data governance and legal requirements

B. Proximity to your customers

Two other factors to consider when selecting a Region are pricing and the services that are available in a Region.

 

The other response options are incorrect because:

C. The  level of support that you choose is not determined by Region. AWS Support plans are explored later in this course.

D. Assigning custom permissions to different users is a feature that is possible in all AWS Regions.

E. The AWS Command Line Interface (AWS CLI) is available in all AWS Regions.

Which statement best describes Amazon CloudFront?

• A.A service that allows you to run infrastructure in a hybrid cloud approach

• B.A serverless compute engine for containers

• C.A service that allows you to send and receive messages between software components through a queue

• D.A global content delivery service

Answer explanation

The correct response option is D: A global content delivery service.

 

Amazon CloudFront is a content delivery service. It uses a network of edge locations to cache content and deliver content to customers all over the world. When content is cached, it is stored locally as a copy. This content might be video files, photos, webpages, and so on.

 

The other response options are incorrect because:

A. AWS Outposts is a service that allows you to run infrastructure in a hybrid cloud approach.

B. AWS Fargate is a serverless compute engine for containers.

C. Amazon Simple Queue Service (Amazon SQS) is a service that allows you to send, store, and receive messages between software components through a queue.

Which site does Amazon CloudFront use to cache copies of content for faster delivery to users at any location?

• A.Edge location

• B.Region

• C.Availability Zone

• D.Origin

Answer explanation

The correct response option is A. Edge location.

The other response options are incorrect because:

B. A Region is a separate geographical location with multiple locations that are isolated from each other.

C. An Availability Zone is a fully isolated portion of the AWS Global Infrastructure.

D. An origin is the server from which CloudFront gets your files. Examples of CloudFront origins include Amazon Simple Storage Service (Amazon S3) buckets and web servers. (Note: Amazon S3 is explored later in this course.)

A customer wants to use an Amazon EC2 instance for a batch processing workload. Which Amazon EC2 instance type should they use?

• A.General purpose

• B.Compute optimized

• C.Memory optimized

• D.Storage optimized

Answer explanation

The correct response option is B. Compute optimized.

The other response options are incorrect because:

A. General purpose instances provide a balance of compute, memory, and networking resources. This instance family would not be an ideal choice for the application in this scenario. Compute optimized instances are more suited for batch processing workloads than general purpose instances.

C. Memory optimized instances are more ideal for workloads that process large datasets in memory, such as high-performance databases.

D. Storage optimized instances are designed for workloads that require high, sequential read and write access to large datasets on local storage. The question does not specify the size of data that will be processed. Batch processing involves processing data in groups. A compute optimized instance is ideal for this type of workload, which would benefit from a high-performance processor.

What are the contract length options for Amazon EC2 Reserved Instances? (Select TWO.)

• A.1 year

• B.2 years

• C.3 years

• D.4 years

• E.5 years

Answer explanation

The two correct response options are:

A. 1 year

C. 3 years

•

Reserved Instances require a commitment of either 1 year or 3 years. The 3-year option offers a larger discount.

A customer has a workload that will run for a total of 6 months and can withstand interruptions. What would be the most cost-efficient Amazon EC2 instance purchasing option?

• A.Reserved Instance

• B.Dedicated Instance

• C.On-Demand Instance

• D.Spot Instance

Answer explanation

The correct response option is D. Spot Instance.

The other response options are incorrect because:

A. Reserved Instances require a contract length of either 1 year or 3 years. The workload in this scenario will only be running for 6 months.

B. Dedicated Instances run in a virtual private cloud (VPC) on hardware that is dedicated to a single customer. They have a higher cost than the other response options, which run on shared hardware.

C. On-Demand Instances fulfill the requirements of running for only 6 months and withstanding interruptions. However, a Spot Instance would be an ideal choice, because it does not require a minimum contract length, can withstand interruptions, and costs less than an On-Demand Instance.

A customer wants to give users messages for the specific topics to which they have subscribed. Which service should they use?

• A.Amazon Simple Notification Service (Amazon SNS)

• B.AWS Lambda

• C.Amazon Simple Queue Service (Amazon SQS)

• D.Amazon Elastic Kubernetes Service (Amazon EKS)

Answer explanation

The correct response option is A. Amazon Simple Notification Service (Amazon SNS).

The other response options are incorrect because:

B. AWS Lambda is a service that lets you run code without provisioning or managing servers.

C. Amazon Simple Queue Service (Amazon SQS) is a service that allows you to send, store, and receive messages between software components through a queue. It does not use the message subscription and topic model that is involved with Amazon SNS.

D. Amazon Elastic Kubernetes Service (Amazon EKS) is a fully managed Kubernetes service. Kubernetes is open-source software that allows you to deploy and manage containerized applications at scale.

Which actions can you perform with AWS Outposts?

• A.Automate actions for AWS services and applications through scripts

• B.Access wizards and automated workflows to perform tasks in AWS services

• C.Extend AWS infrastructure and services to your on-premises data center

• D.Develop AWS applications in supported programming languages

Answer explanation

The correct response option is C: Extend AWS infrastructure and services to your on-premises data center.

The other response options are incorrect because:

A. The AWS Command Line Interface (AWS CLI) is used to automate actions for AWS services and applications through scripts.

B. The AWS Management Console includes wizards and workflows that you can use to complete tasks in AWS services.

D. Software development kits (SDKs) allow you to develop AWS applications in supported programming languages.

Which component or service can be used to establish a private dedicated connection between a company’s data center and AWS?

• A.Private subnet

• B.DNS

• C.AWS Direct Connect

• D.Amazon CloudFront

Answer explanation

The correct response option is C. AWS Direct Connect.

The other response options are incorrect because:

A. A private subnet is a section of a VPC in which you can group resources that should be accessed only through your private network. Although it is private, it is not used for establishing a connection between a data center and AWS.

B. DNS stands for Domain Name System, which is a directory used for matching domain names to IP addresses.

D. Amazon CloudFront is a content delivery service. You can use CloudFront to store cached copies of your content at edge locations that are close to your customers.