AWS interview Q52. By default how many Ip address does aws reserve in a subnet?

By default how many Ip address does aws reserve in a subnet? Your Query:
Aws
aws console
aws web services
amazon workdocs
aws cloud
aws management console
Ec2
Dynamodb
S3
Amazonaws
aws lambda
aws cloud computing
aws amazon web services
virtual private cloud
aws certified
Lambda
simple notification service

source

ipv4