What is reactive programming?

What is reactive programming?

• A. A programming paradigm that combines concurrency with event-based and asynchronous systems.
• B. A style for procedural programming.
• C. A purely synchronous blocking model.
• D. A paradigm for functional programming only.

Answer: (C)

Reactive programming focuses on data streams and reacting to changes as they occur. It models inputs, outputs and events as streams you can observe and transform with composable operators, all in an asynchronous, non-blocking, event-driven way. This design keeps systems responsive and scalable because work is driven by events rather than blocking operations, and backpressure can be used to throttle producers when consumers can’t keep up. The description that talks about combining concurrency with event-based and asynchronous systems best captures this idea. The other options describe procedural styles, a purely synchronous blocking model, or a restriction to functional programming, none of which fully describe reactive programming.

Reactive programming focuses on data streams and reacting to changes as they occur. It models inputs, outputs and events as streams you can observe and transform with composable operators, all in an asynchronous, non-blocking, event-driven way. This design keeps systems responsive and scalable because work is driven by events rather than blocking operations, and backpressure can be used to throttle producers when consumers can’t keep up. The description that talks about combining concurrency with event-based and asynchronous systems best captures this idea. The other options describe procedural styles, a purely synchronous blocking model, or a restriction to functional programming, none of which fully describe reactive programming.