Gallagher Java Full Stack Developer Interview Questions and Answers

Maths and logical questions

Q1. What is callback
Ans. 
A callback is a function that is passed as an argument to another function and is executed after the completion of that function.
• Callbacks are commonly used in asynchronous programming to handle tasks that take time to complete.

• Callbacks can be used to handle events, such as button clicks or data retrieval.

• Example: setTimeout(callbackFunction, 1000);
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