NEC Trainee Interview Questions and Answers

MCQs type questions in first round

2 section for coding round with 3questions in first and 2 in second

40 question asked 25 questions from aptitude and 15 questions from data structure and some from computer fundamental's, questions are easy to medium.

3 Coding questions were asked in Coding round
First question from String
Second question from Array
3rd from Dynamic Programming

Q1. One coding question were asked Find missing and duplicate numbers from N Natural numbers array
Ans. 
Find missing and duplicate numbers from N Natural numbers array
• Iterate through the array and keep track of seen numbers using a hash set

• For each number, check if it is already in the hash set. If yes, it is a duplicate. If not, add it to the set

• After iterating through the array, the missing numbers are the ones not in the hash set

• Alternatively, sort the array and check for duplicates and missing numbers
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This round consisted of Aptitude and Computer Fundamental Questions.I don't remember exactly how many but I guess there were around 50 MCQ's. I might solved around 37+ correct questions.

This round consisted of 3 Coding Questions. 1 Easy Medium, 1 Medium and 1 Hard Question.Solved first two and passed only 3 test cases in the third question.

Q1. This round lasted for only 15 minutes and the interviewer asked me Two Sum Problem. Explained from Naive to Most Optimized solution, i.e O(N^2) to O(N).Gave him 3 solutions and the interviewer was satisfie...read more
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Q2. Given an array find if there are two elements are present that sum to target, else return -1;
Ans. 
Given an array find if there are two elements are present that sum to target, else return -1
• Iterate through the array and for each element check if target - element is present in the array

• Use a hash table to store the elements and their indices for faster lookup

• If no such pair is found, return -1
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Q1. General HR Questions like Strengths, Weaknesses, About Company and bit about my family background.
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Medium to moderate level questions on profit loss, percentage etc

Medium to moderate question on array , string and HashMap

Q1. Question on OOPs and Sql
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Q2. OOPs question like inheritance, polymorphism , interface and some coding question on array SQL
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Basic aptitude questions, time duration within 60 minutes.

Five questions - two easy, three moderate level

Q1. Basic DSA, OOPS concepts, complexities related questions
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Q1. About yourself? Why you want to join nagarro? Salary expectation? Location is ok with you?
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Simple Aptitude Questions

3 coding questions, easy to medium difficulty

Q1. Basic Oops questions
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Q1. Intro and why you want to join.
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Q1. DSA Question about linked list operation
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Q1. Simple hr questions like your strength weakness , able to relocate
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