Nickelfox Technologies interview experience Real time questions & tips from candidates to crack your interview

Backend Developer

Nickelfox Technologies

1 rounds | 3 Coding problems

Anshuman Singh

Fresher | Jan 2022

Rejected

Interview preparation journey

Preparation

Duration: 4 Months

Topics: Data Structures, OOPS, Algorithms, Node js, javascript

Tip

Tip 1 : Prepare javascript as much you can
Tip 2 : As you complete js you can go with node js express and MongoDB for the database (backend role)
Tip 3 : Prepare yourself with algorithm searching sorting and all that
Tip 4 : Do at least 2 projects to gain practical knowledge

Application process

Where: Campus

Eligibility: Node js, Oops

Resume tip

Tip 1 : Atleast for skill write javascript, node js, express, oops
Tip 2 : Atleast do 2 project related to web development that shows your hands on skill on the project

Interview rounds

Round

Medium

Video Call

Duration40 Minutes

Interview date12 Jan 2022

Coding problem3

it was in morning approx 11 am
there was 2 Interviewer
one was calm and helps if I miss out small things
Interview was bit on advance side

1. Zero Pair Sum

Moderate

20m average time

70% success

0/80

Asked in companies

You are given an array ‘arr’ of ‘N’ integers. Your task is to find the count of pairs with a sum equal to zero.

Specifically, find the count of all pairs ( i , j ) such that i < j and arr[i] + arr[j] = 0

Problem approach

You can see the approach from coding ninja I follow these and they have explained well (mainly we have to iterate over I and j(0,n-2) like that u can follow coding ninja

Try solving now

2. N Queens

Hard

55m average time

35% success

0/120

Asked in companies

You are given an integer 'N'. For a given 'N' x 'N' chessboard, find a way to place 'N' queens such that no queen can attack any other queen on the chessboard.

A queen can be killed when it lies in the same row, or same column, or the same diagonal of any of the other queens. You have to print all such configurations.

Try solving now

3. Technical Questions

Mainly they asked javaScript questions from basic to advance so prepare for all lexial scoping closure,Type Coercion in javascript. and all my suggestion do all topic