Celebal Technologies Node JS Developer Interview Questions and Answers for Freshers

Coding questions related to trees and graphs

• Q1. Anagrams related
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• Q2. Sorting related
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• Q1. Explain the difference client side routing server side routing
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• Q2. Js questions (map,filter, reduce) polyfills recursion
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• Q1. Why do you want the join org
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A groups of 10 were formed for GD

The question were very basic related to OOPS.

• Q1. They will ask questions based on what you have mentioned in your resume
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• Q1. They have asked about my previous company project and questions related to that
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English and reasoning

• Q1. Core Java questions
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• Q2. SQL query and project details which we did
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• Q3. What jdbc how it's work
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• Q4. How to store file data to DB
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• Q5. Sql query for 3rd highest salary of employee
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Economic growth vs environment impact

• Q1. Question related to dotnet core
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• Q2. Web api , sql
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Round duration - 120 Minutes
Round difficulty - Hard

Online Test Platform - HackerRank
Test Access Window – between 10:00 AM to 6:00 PM
Online Test Pattern –

Total Duration of Test – 120 mins
Total No. of Sections - 5
Section 1 – One Coding Question - Easy difficulty (20 mins)
Section 2 – One Coding Question - Medium difficulty (30 mins)
Section 3 – One Coding Question - Medium difficulty (30 mins)
Section 4 - Technical MCQs - 10 questions (20 mins)
Section 5 - Aptitude MCQs - 10 questions (20 mins)
Programming Sections (1, 2 and 3): This will have 3 coding questions with a time limit of 80 minutes. It is mandatory for you to attempt the 1st coding question before moving to the second question and third. You cannot revisit question/section once you proceed ahead
MCQ Sections (4 and 5): This will have 10 technical and 10 aptitude questions, with a time limit of 20 minutes each. Each correct answer will carry 2 marks and wrong answer will carry negative 0.5
Technical questions will cover Data structures & algorithms, Operating systems, Database systems, SQL and Networks.
Aptitude questions will cover Quantitative Aptitude, Problem solving and Logical & verbal Reasoning

• Q1. Towers You are given ‘N’ cubes in an array ‘ARR’ in a certain order, and your task is to build towers using them. Whenever two cubes are on top of the other, th...read more
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• Q2. Minimum Removals You’re given an array ‘ARR’ of size N and an integer K. Your task is to determine the minimum number of elements that should be removed from th...read more
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• Q3. Conquer the Best Kingdom Aragorn is a great ruler and desires to become the most powerful in the entire world. There are ‘N’ kingdoms, kingdoms are numbered fro...read more
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Round duration - 60 Minutes
Round difficulty - Medium

They called and asked me to choose a date and time I would be free in the upcoming week for my interview.
I chose 10th March 5 pm. 

Interviewer was pretty friendly. Started with some resume based questions. Asked me OS, DBMS and JAVA based questions. A coding question was asked to code. Asked me OOPS related questions too.

• Q1. K Most Frequent Elements You are given an Integer array ‘ARR’ and an Integer ‘K’. Your task is to find the ‘K’ most frequent elements in ‘ARR’. Return the eleme...read more
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