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gRPC (Google Remote Procedure Call) is a language-neutral, platform-neutral, and open-source remote RPC system that supports unary RPCs and streaming RPCs. Which of the following service methods are NOT supported by gRPC?
Correct Answer: B,C
Comprehensive and Detailed Explanation: # gRPC supports four types of RPCs: * Unary RPC # Client sends one request, server responds once. * Server streaming RPC # Server sends multiple responses. * Client streaming RPC # Client sends multiple requests. * Bidirectional streaming RPC # Both sides exchange multiple messages. # Why B and C Are Incorrect:# (B) Incorrect # The method rpc dataPublish(stream serviceArgs) returns (stream serviceArgs) {} violates gRPC syntax.# (C) Incorrect # rpc stream LotsOfGreetings(HelloRequest) returns (HelloResponse) {} contains incorrect stream positioning. # Reference: Huawei HCIE Datacom - gRPC API and Streaming Mechanisms