Cloud9 Technologies Interview Questions and Answers

Difficult round and got to know from HR that I only cleared.

Q1. Write syntax for promise and callback?
Ans. 
Promise and callback syntax in JavaScript
• Promise syntax: new Promise((resolve, reject) => { // code here })

• Callback syntax: functionName(arg1, arg2, callbackFunction)

• Example of Promise: new Promise((resolve, reject) => { setTimeout(() => { resolve('Done!') }, 1000) })

• Example of Callback: function fetchData(url, callback) { // code to fetch data and then call callback }
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Q2. How to do object copy?
Ans. 
Object copy can be done using either shallow copy or deep copy methods.
• Shallow copy: copies only the references of the objects, not the actual objects themselves.

• Deep copy: creates new objects and recursively copies all nested objects.

• In Java, shallow copy can be achieved using clone() method and deep copy can be achieved using serialization and deserialization.

• In JavaScript, shallow copy can be done using Object.assig...read more
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Q1. About scrum master questions
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Q2. Role and responsibilities
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