Mandatory JavaScript Knowledge for Coding Interview

Are you attempting coding interview challenges in Javascript? Then make sure you learn below mandatory JavaScriipt apis and utilities.

Math Library

Math.floor Math.round

Used in Binary Search algorithm

Math.abs

Array related

Array Slice

Used in Merge sort algorithm.

Array Sort

Initialize 2D array

Map

JavaScript Map

Difference between i++ and ++i

So basically ++i returns the value after it is incremented, while i++ return the value before it is incremented.

Javascript Bitwise operator

Right Shift x»y

Moving bit/s towards the right side in binary number.

4>>2 = 16

x>>y means x/2^y divide x by 2 to the power of y.

Left Shift x«y

Moving bit/s towards the left side in binary number.

4<<2 = 0

x<<y means x*2^y multiply x by 2 to the power of y.

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