Your company is planning to deploy an application that will consist of a web and database tier. The database tier should not be accessible from the Internet. How would you design the networking part of the application? Choose 2 answers from the options below.

Answer options:

A.A public subnet for the web tier
B.A private subnet for the web tier
C.A public subnet for the database tier
D.A private subnet for the database tier

Answer - A and D
The below diagram from the AWS Documentation shows the design of a web and database tier.
Option B is incorrect since users will not access the web application if it is placed in a private subnet.
Option C is incorrect since the question mentions that the database should not be accessible from the internet.
For more information on private and public subnets and the VPC, please visit the below URL-
https://docs.aws.amazon.com/AmazonVPC/latest/UserGuide/VPC_Scenario2.html