Multiple choice technology web technology

A Java NullPointerException was thrown while tracing a Flow service using the webMethods IS Developer. What is the most likely reason?

  1. A required input was not set or mapped and so did not exist at run-time

  2. The "switch" variable of a Branch operation in the Flow was NULL at run-

  3. The Flow executed an Exit operation with the "signal failure" option

  4. A Loop operation in the Flow service has no input array defined

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A NullPointerException in Flow tracing most commonly occurs when trying to access a pipeline variable that doesn't exist because a required input wasn't set or mapped. Options B, C, and D cause different errors (branch on NULL, exit signal failure, or no loop array), not necessarily NPE.

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