Which statement best describes RPC usage?

Which statement best describes RPC usage?

• A. A stateless, resource-based protocol.
• B. A relational query language used for data analysis.
• C. An action-oriented API paradigm where clients call functions on a remote server as if they were local.
• D. A protocol that serializes data as using GraphQL.

Answer: (C)

RPC is about invoking code remotely in a way that makes the remote function call look like a local call. The key idea is that a client asks a server to execute a function and return the result, while the client remains unaware of underlying network details, serialization, or routing. This action-oriented approach focuses on performing operations (procedures) rather than manipulating resources identified by identifiers, which is what other paradigms emphasize. The description matches RPC because it highlights calling functions on a remote server as if they were local functions. The other options describe different API styles: a stateless, resource-based protocol aligns with REST; a relational query language is about data analysis queries; GraphQL is a flexible data-fetching query language for APIs, not about remote procedure calls.

RPC is about invoking code remotely in a way that makes the remote function call look like a local call. The key idea is that a client asks a server to execute a function and return the result, while the client remains unaware of underlying network details, serialization, or routing. This action-oriented approach focuses on performing operations (procedures) rather than manipulating resources identified by identifiers, which is what other paradigms emphasize.

The description matches RPC because it highlights calling functions on a remote server as if they were local functions. The other options describe different API styles: a stateless, resource-based protocol aligns with REST; a relational query language is about data analysis queries; GraphQL is a flexible data-fetching query language for APIs, not about remote procedure calls.