Have you heard about hoisting in js , explain
Node Js Developer Interview Questions
731 node js developer interview questions shared by candidates
regaing coding how much you in javascript etc
In the DSA round, I was asked to solve a problem based on finding longest non repeaiting substring using either a brute-force or optimized approach.
Coding and basic node js question
In first round questions were 1. Brief Introduction 2. How Nodejs works, event loops, async and await, fs.readFile and fs.readFileSync. 3. Practical questions on es6 scope, spread operator, destructuring. e.g let arr = [1,2,3,4,5,5,6] //find first 3 parameters //tell me the output console.log('me run'); setTimeout(()=> { console.log('me run 2')}, 0}); console.log('me run 3'); In second round, there were lot of logic questions which you need to answer the output. and HR round.
Relational Databases queries on real life.
Return value of find and findOne in MongoDB
1. Rotate 2D array with constant space. 2. Searching an element in an array that has a peak e.g. [1,2,3,4,5,6,20,19,18,16], with no more than log n time complexity.
basic of node event loop , promises, async/ await code written, architecture of the project roles in it. jwt token process.
explain callback hell and how to avoid the same.
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