---
title: "What is the callback ?"  
description: "What is the callback ?"  
author: "Varun Agrawal"  
published: 2011-03-28  
updated: 2020-09-23  
canonical: https://www.mindstick.com/interview/704/what-is-the-callback  
category: "ajax"  
tags: ["ajax"]  
reading_time: 1 minute  

---

# What is the callback ?

The **Callback** feature that enables you to retrieve page values and populates them to an already generated page without regenerating the page. This capability makes it possible to change values on a page without going through the entire **postback** cycle.

## Answers

### Answer by Varun Agrawal

The **Callback** feature that enables you to retrieve page values and populates them to an already generated page without regenerating the page. This capability makes it possible to change values on a page without going through the entire **postback** cycle.


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Original Source: https://www.mindstick.com/interview/704/what-is-the-callback

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