Adita Technologies Interview Questions and Answers

Q1. What is promises in JavaScript
Ans. 
Promises in JavaScript are a way to handle asynchronous operations and avoid callback hell.
• Promises represent a value that may not be available yet but will be resolved at some point in the future.

• They have three states: pending, fulfilled, or rejected.

• Promises can be chained using .then() and .catch() methods.

• They help in writing cleaner and more maintainable code.

• Example: new Promise((resolve, reject) => { ... }).the
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Q2. What is async await in js
Ans. 
Async/await is a way to write asynchronous code in a synchronous style in JavaScript.
• Async/await is built on top of Promises.

• It allows us to write asynchronous code that looks like synchronous code.

• The 'async' keyword is used to define an asynchronous function.

• The 'await' keyword is used to pause the execution of a function until a Promise is resolved.

• Async/await makes error handling easier by allowing us to use try/ca
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Write a program to find duplicate records in array