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  1. Which of the following is the server library for Node.js?
    1. jsonrpc
    2. ws
    3. SignalR
    4. Caddy
    5. None of these
Correct Option: B

ws is server library and WebSocket client for Node.js. Caddy is used for proxying arbitrary commands. WebSocket under covers is used by SignalR. To use asynchronous RPC library with the bidirectional call we use JSONRPC.server.


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