REST APIs use a fixed set of endpoints to access different resources and require multiple requests to retrieve related data. They follow a resource-oriented approach and use standard HTTP methods. GraphQL APIs, on the other hand, allow clients to request specific data with a single query and receive only what they need, reducing over-fetching and under-fetching of data. They follow a schema-based approach and support complex queries and mutations. While REST is simpler and widely adopted, GraphQL offers more flexibility and efficiency in data retrieval.
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