[Solved] Which of the following is TRUE about the callback function in executeAsyncScript? — Ans: It must be called to signal script completion | Selenium Java

Selenium Java - JavaScriptExecutor

Which of the following is TRUE about the callback function in executeAsyncScript?

AIt is optional and can be omitted

BIt must be called to signal script completion

CIt automatically returns the page title

DIt is used to handle exceptions only

Step-by-Step Solution

Solution:

Step 1: Role of callback in async scripts
The callback function signals when the async script finishes execution.
Step 2: Importance of calling callback
If the callback is not called, the script will timeout and fail.
Final Answer:
It must be called to signal script completion -> Option B
Quick Check:
Callback must be called = true [OK]

Quick Trick: Always call callback to finish async script [OK]

Common Mistakes:

MISTAKES

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Which of the following is TRUE about the callback function in executeAsyncScript?