What is $q service and when to use it?
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Answer / Ajay Kumar Agnihotry
$q in AngularJS represents a promise library for handling asynchronous operations. It provides an API for creating, resolving, and rejecting promises.nnYou should use the $q service when you need to work with complex asynchronous code, such as combining multiple promises using methods like `$q.all()` or `$q.race()`, or dealing with deferred execution using the promise API.
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