Which instance type is described as virtual machines in the context of AWS?

• A. S3
• B. Lambda
• C. EC2
• D. RDS

Answer: (C)

The correct answer is EC2, which stands for Elastic Compute Cloud. EC2 instances are essentially virtual machines that run on the AWS infrastructure. Each EC2 instance provides a secure and resizable compute capacity, allowing users to quickly scale up or down based on their needs.

With EC2, users have complete control over their virtual machines, including the operating system, applications, and configuration, enabling a high degree of flexibility for hosting web applications, databases, and other workloads. Users can choose from a variety of instance types optimized for different use cases, such as memory-intensive, compute-intensive, or storage-optimized workloads.

In contrast, S3 (Simple Storage Service) is primarily a storage service, allowing users to store and retrieve objects in the cloud, but it does not provide compute capabilities. Lambda is a serverless compute service that automatically runs code in response to events without managing servers, making it different from traditional virtual machines. RDS (Relational Database Service) offers managed database services, which handle database operations but do not function as virtual machines in the traditional sense.