$1.$Which of the following statement is true if your database only needs to be available to your web server.

$-$Create a VPC with two public subnets. Host the web server in the public subnet $1$ and host the DB instance is in public subnet $2.$

$-$Create a VPC with two private subnets. Host the web server in the private subnet $1$ and host the DB instance is in private subnet $2.$

$-$Create a VPC with a public subnet and a private subnet. Host the web server in the private subnet and host the DB instance is in the public subnet.

$-$Create a VPC with a public subnet and a private subnet. Host the web server in the public subnet and host the DB instance is in the private subnet.

$2-$ What configuration is required to allow a web server EC$2$ instance to access a DB instance.

$-$DB Instance group

$-$DB subnet group

$-$Security group

$3-$ Each DB subnet group requires subnet$/$s in at least $\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_.$

$-$One Availability Zone.

$-$Two Availability Zones.

$-$Thee Availability Zones.

$4-\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_$ is used to assign subnets that can be used for database instance in a VPC$.$

$-$DB Instance group

$-$DB subnet group

$-$Security group

$5-$ When you provision a Multi$-$AZ DB instance:

$-$Amazon RDS automatically creates a standby DB instance and synchronously replicates the data to a primary instance in a different Availability Zone $($AZ$).$

$-$Amazon RDS automatically creates a primary DB instance and synchronously replicates the data to a standby instance in a different Availability Zone $($AZ$).$

$-$Amazon RDS automatically creates a standby DB instance and synchronously replicates the data to a primary instance in the same Availability Zone $($AZ$).$

$-$Amazon RDS automatically creates a primary DB instance and synchronously replicates the data to a standby instance in the same Availability Zone $($AZ$).$