A marketing team needs to deploy a web application quickly without managing servers, operating systems, or middleware, and wants to focus only on the application code. Which cloud service type is most suitable?

Platform as a Service (PaaS) is the most suitable option because it provides a complete development and deployment environment in the cloud, allowing developers to build, run, and manage applications without the complexity of building and maintaining the infrastructure. This aligns with the marketing team's need to focus solely on application code without managing servers, operating systems, or middleware. Infrastructure as a Service (IaaS) would require the team to manage virtual machines, operating systems, and other infrastructure components. Software as a Service (SaaS) offers a complete, ready-to-use application, which isn't what the team needs as they are deploying their own web application. On-premises would involve managing all hardware and software locally, which contradicts the desire for quick deployment without infrastructure management.