Instruction: Discuss the conceptual differences between REST and GraphQL, and their implications when consumed by a JavaScript application.
Context: This question assesses the candidate's understanding of web API consumption in JavaScript applications, focusing on the differences between RESTful services and GraphQL.
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At its core, REST (Representational State Transfer) is an architectural style that relies on a predefined set of stateless operations. These operations are primarily HTTP methods like GET, POST, PUT, DELETE, etc. RESTful services expose a set of URLs, each representing a resource. When a JavaScript application needs to interact with a REST API, it makes HTTP requests to these URLs to retrieve or manipulate resources. This approach is straightforward and follows the principles of the web closely, which has contributed to its widespread adoption.
On the other hand, GraphQL, developed by Facebook, presents a more flexible and efficient way to interact with web services. Unlike REST, which operates on resources through individual endpoints, GraphQL uses a single endpoint. This endpoint accepts queries and mutations, allowing clients to specify exactly what data they need or want to change....