Question

Checks whether the input made to the transition is valid before performing the transition

Answer 1

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Answer 2

Validators checks whether the input made to the transition is valid before performing the transition

Explanation:

• Validators are checkups that are done in a workflow transition when you execute them.  
• Validators are of two types. They are Sync and Async Validators. Sync Validators when run, return with a set of validation errors to be corrected. Async Validators when run returns an observable which then gives a list of validation errors.  
• It is mostly to ensure weather the syntax which is keyed-in is correct to run the program.

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