ACloud Guru Certified Cloud Practitioner Practice Exam

What benefit does using AWS Lambda provide to developers?

1. Server provisioning

2. Cost-effective compute resources

3. Managed database services

4. Scalable virtual machines

The correct answer is: Cost-effective compute resources

Using AWS Lambda provides a cost-effective approach to compute resources because it operates on a pay-as-you-go pricing model. Developers are charged only for the actual compute time that their code uses, which means they do not have to pay for idle server time. This model allows for significantly reduced costs, especially for applications with variable workloads where compute demands can fluctuate throughout the day. Furthermore, AWS Lambda automatically scales the execution of applications in response to incoming request volumes. This eliminates the need for developers to provision or manage servers, as well as minimizing the up-front costs associated with deploying applications on traditional compute resources. This aspect of Lambda directly supports agility and operational efficiency in development processes, enabling developers to focus on writing code rather than managing infrastructure. The other options refer to different services and concepts within AWS that do not relate directly to the specific benefits of AWS Lambda. Server provisioning involves the management of the underlying infrastructure, which is not needed with Lambda. Managed database services pertain to services that handle database needs, and scalable virtual machines require management and are often associated with traditional infrastructures such as Amazon EC2.