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JavaScript interview questions and answers

Coding Challenge: Given an unsorted array A of size N of non-negative integers, find a continuous sub-array which adds to a given number S.

June 28, 2020 admin 0

Input: [1, 2, 4, 6, 7, 5], 12 Output: [7,5] Logic Implementation: We can keep adding numbers from array. We can check conditions, if it […]

Write the code to find the balance point of an Array.

April 27, 2020 admin 0

Question: You have given an array of integer. You need to create the algorithm which finds the balance point in the given array and return […]

Design a webpage which can auto-post new posts when you reach the bottom of the page by using JavaScript.

April 26, 2020 admin 0

First of all you need to create the html page which contains 1 or 2 posts, which means on the page you can show headline […]

Coding Challenge – Find maximum in a stack in o(1) time!

April 15, 2020 admin 0

Question: Create getMax() function to find maximum in a stack in O(1) time! This is widely asked technical interview for software engineers. You should know […]

Coding Challenge – Find the year with the most number of people alive!

April 13, 2020 admin 0

Question: Given a list of people with their birth and end years (all between 1900 and 2000), find the year with the most number of people alive. Input: […]

Coding Challenge – Bring all nonzero elements to the left of the array

April 11, 2020 admin 0

Question: Write an algorithm that brings all nonzero elements to the left of the array, and returns the number of nonzero elements. Input : {1, […]

Coding Challenge – Find out if a given singly-linked list contains a cycle.

April 8, 2020 admin 0

Question: Write a function testListCycle() that takes node as argument for a given singly-linked list and returns a boolean indicating whether the list contains a cycle. A cycle meaning when […]

Coding Challenge – Build Shut the Box playable game.

April 8, 2020 admin 0

Question: build a dice game called Shut the Box. Reference: http://en.wikipedia.org/wiki/Shut_the_Box The object of the game: Flip over as many cards to match dice totals […]

Coding Challenge – Create the Timer with Start, Pause and Reset functionalities.

April 7, 2020 admin 0

Question: Create the behavior for a digital web stopwatch. Here are the action we are expecting: * When “Start” is clicked, the text “Stop Watch” […]

Coding Challenge: Find out duplicates from given Array

April 4, 2020 admin 0

Question: Find out the duplicates from a given array and return it. Solution: To solve this problem, we will use “map” data structure and check […]

Coding Challenge: Given an unsorted array A of size N of non-negative integers, find a continuous sub-array which adds to a given number S.

Input: [1, 2, 4, 6, 7, 5], 12 Output: [7,5] Logic Implementation: We can keep adding numbers from array. We can check conditions, if it […]
Write the code to find the balance point of an Array.

Question: You have given an array of integer. You need to create the algorithm which finds the balance point in the given array and return […]
Design a webpage which can auto-post new posts when you reach the bottom of the page by using JavaScript.

First of all you need to create the html page which contains 1 or 2 posts, which means on the page you can show headline […]
Coding Challenge – Find maximum in a stack in o(1) time!

Question: Create getMax() function to find maximum in a stack in O(1) time! This is widely asked technical interview for software engineers. You should know […]
Coding Challenge – Find the year with the most number of people alive!

Question: Given a list of people with their birth and end years (all between 1900 and 2000), find the year with the most number of people alive. Input: […]