An overview of the difference between declarative and imperative programming paradigms, with a focus on data pipelines. Declarative pipelines specify what should happen (e.g., upload to S3) without detailing how, leaving execution logic to the underlying system. Imperative pipelines require explicit step-by-step implementation. Examples include Kubernetes-style declarative infrastructure, Ascend.io's declarative data pipeline architecture, and Gremlin graph traversal language showing both styles side by side.