An application team needs to quickly provision a development environment consisting of a web and database layer. What would be the quickest and most ideal way to get this set up in place?

Answer options:

A.Create Spot Instances and install the web and database components.
B.Create Reserved Instances and install the web and database components.
C.Use AWS Lambda to create the web components and AWS RDS for the database layer.
D.Use Elastic Beanstalk to quickly provision the environment.

Correct Answer – D
AWS Documentation mentions the following:
With Elastic Beanstalk, you can quickly deploy and manage applications in the AWS Cloud without worrying about the infrastructure that runs those applications. AWS Elastic Beanstalk reduces management complexity without restricting choice or control. You simply upload your application, and Elastic Beanstalk automatically handles the details of capacity provisioning, load balancing, scaling, and application health monitoring.
For more information on AWS Elastic Beanstalk, please refer to the URL below.
https://docs.aws.amazon.com/elasticbeanstalk/latest/dg/Welcome.html
Option A is incorrect. Amazon EC2 Spot instances are spare compute capacity in the AWS cloud available to you at steep discounts compared to On-Demand prices. 
Option B is incorrect. A Reserved Instance is a reservation of resources and capacity for either one or three years for a particular Availability Zone within a region. 
Option C is incorrect. AWS Lambda is a compute service that makes it easy for you to build applications that respond quickly to new information and not for provisioning a new environment.
Currently, the Elastic Beanstalk environment supports the following configurations:
It supports RDS. 
Database Configuration Setting
AWS Elastic Beanstalk provides connection information to your instances by setting environment properties for the database hostname, username, password, table name, and port. When you add a database to your environment, its lifecycle is tied to your environments.