08 — Quiz: MCP fundamentals

Pick an answer. The quiz checks it and shows the explanation.

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1. You add three MCP servers to Claude Code. How many MCP clients does the host run?

a) one, shared by all servers

b) three: one per server connection

c) none: the model talks to servers directly

d) it depends on the transport

b — the host creates one client per server, each with its own connection.

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2. Who decides when the notes://all resource is used?

a) the model, like a tool

b) the app or you, for example by typing @notes:notes://all

c) the server pushes it on every turn

d) nobody: resources are only for logging

b — resources are application-controlled. Tools are the model-controlled primitive.

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3. A server moves from stdio to Streamable HTTP. Which layer changes?

a) the data layer: new message format

b) the transport layer: how messages travel, plus connection setup and auth

c) both layers

d) neither

b — JSON-RPC messages look the same on every transport.

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4. A client using spec 2026-07-28 connects to a server. What replaces the old initialize handshake?

a) nothing: it still sends initialize

b) each request carries its protocol version and capabilities in _meta, and the client may call server/discover

c) an HTTP session ID

d) a ping request

b — 2026-07-28 is stateless. Version info travels with every request.

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5. Claude calls a tool with a date in the wrong format. How should the server answer?

a) a JSON-RPC error object

b) a normal result with isError: true and a message the model can read

c) an empty result

d) close the connection

b — bad input is a tool execution error. The model can read it and try again correctly.

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