Refer to the exhibit. This Python script script uses the websocket-based, xAPI library 'pyxows' to monitor and print event details to the console when users interact with UI Extension/In-Room Control

Question

Options

• Aawait client.xEvent(['Event', '*'], callback)
• Bawait client.subscribe(['Event', 'ActionButton', 'Clicked'], callback)
• Cawait client.subscribe(['Event', '*'], callback)
• Dawait client.xEvent(['Event', 'UserInterface', 'Extensions', 'Panel', 'Clicked'], callback)
• Eawait client.subscribe(['Event', 'UserInterface', 'Extensions', 'Panel', 'Clicked'], callback)

• A
  8% (3)
• B
  13% (5)
• C
  3% (1)
• D
  76% (29)

Explanation

Options D and E are correct because they both use the exact, correct xAPI event path - Event > UserInterface > Extensions > Panel > Clicked - which is the precise hierarchy Webex room devices fire when a UI Extension Action Button is pressed. The pyxows library exposes two valid methods for event subscription (xEvent and subscribe), and both work when given the correct path, making D and E functionally equivalent for this use case.

Why the distractors fail:

• A uses xEvent with a wildcard ('*'), which is not a valid subscription syntax for xEvent in pyxows - the method requires a fully qualified path.
• B uses subscribe but with an incorrect path ('ActionButton'), which doesn't match the actual xAPI hierarchy; the real path goes through UserInterface > Extensions > Panel.
• C uses subscribe with a top-level wildcard, which is too broad and not supported as a valid event filter in pyxows.

Memory tip: Think of the xAPI path as a file system folder structure - UserInterface > Extensions > Panel > Clicked mirrors how Cisco's xAPI actually names these events. If the path doesn't spell out that full hierarchy, the subscription won't match. When you see 'ActionButton' or a bare '*', that's a red flag that the path is wrong or unsupported.

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