Thoughts2Binary Interview Questions and Answers

Terraform scripts to provision an EC2 instance, RDS database, and VPC in AWS.

• Define the provider: Use 'provider "aws" { region = "us-east-1" }' to specify the AWS region.

• Create a VPC: Use 'resource "aws_vpc" "main" { cidr_block = "10.0.0.0/16" }' to define a VPC.

• Set up subnets: Use 'resource "aws_subnet" "subnet1" { vpc_id = aws_vpc.main.id cidr_block = "10.0.1.0/24" }' for subnets.

• Launch an EC2 instance: Use 'resource...read more

Diagnosing EC2 connectivity issues involves checking security groups, network ACLs, and instance status.

• Check the instance's public IP or DNS name to ensure you're using the correct address.

• Verify that the security group associated with the EC2 instance allows inbound traffic on the required ports (e.g., port 22 for SSH).

• Examine the network ACLs to ensure they are not blocking traffic to or from the instance.

• Ensure the...read more

Primary key uniquely identifies a record in a table, while foreign key refers to a field in another table.

• Primary key is used to enforce data integrity and ensure uniqueness of records

• Foreign key is used to establish a relationship between two tables

• A table can have only one primary key, but multiple foreign keys

• Primary key is always indexed, while foreign key may or may not be indexed

• Primary key cannot have null value...read more