What is the most common cause of "mbox parameter mismatch" errors?

Question

Options

• AIncorrect activity setup
• BInconsistent parameter names between client-side and server-side requests
• CA missing profile script
• DMisconfigured pre-hiding snippet

• A
  13% (4)
• B
  78% (25)
• C
  3% (1)
• D
  6% (2)

Explanation

Option B is correct because "mbox parameter mismatch" errors occur when the parameter names or values passed in a client-side mbox call (e.g., via at.js) don't match what the server-side implementation expects - for example, sending productId on the client but product_id on the server causes Target to treat them as different parameters, breaking activity qualification or profile data collection.

Why the distractors are wrong:

• A (Incorrect activity setup): Activity misconfiguration causes targeting or delivery issues, not parameter mismatch errors specifically.
• C (Missing profile script): A missing profile script would cause profile attributes to be undefined, not a parameter name mismatch.
• D (Misconfigured pre-hiding snippet): The pre-hiding snippet controls flicker prevention; it has no effect on how parameters are named or matched.

Memory tip: Think of mbox parameters like a handshake - both hands must match. If client says "hello" and server expects "Hi," the handshake fails. Mismatch = mismatched names between two sides of the request.

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