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NSE.IT Interview Questions and Answers

Updated 15 Sep 2024
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Q1. Merge K Sorted Arrays Problem Statement

Given 'K' different arrays that are individually sorted in ascending order, merge all these arrays into a single array that is also sorted in ascending order.

Input

The f...read more
Ans.

Merge K sorted arrays into a single sorted array.

  • Iterate through all arrays and merge them into a single array.

  • Use a min heap to efficiently merge the arrays.

  • Implement a custom comparator function for the min heap.

  • Time complexity can be optimized to O(N log K) using min heap.

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Q2. What is the low-level design for storing contacts in a phone book?
Ans.

Use a data structure like a hash table to store contacts in a phone book.

  • Use a hash table to store contacts with keys as names and values as contact information

  • Each contact entry can be a structure containing fields like name, phone number, email, etc.

  • Implement functions for adding, deleting, searching, and updating contacts in the phone book

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Q3. Find max square area in a binary matrix

Ans.

Find the maximum area of a square in a binary matrix.

  • Iterate through the matrix and for each cell, calculate the maximum square area that can be formed with that cell as the top-left corner.

  • Use dynamic programming to store the maximum square area at each cell.

  • Keep track of the maximum area encountered so far and return it as the result.

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Q4. Find longest increasing sequence in a matrix

Ans.

Find longest increasing sequence in a matrix

  • Iterate through each element in the matrix

  • For each element, check its neighbors to find the longest increasing sequence

  • Keep track of the longest sequence found so far

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Q5. Given an infinite array stream having a unknown number being repeated after a certain index. Find the index after which that number repetition starts.

Ans.

Find the index after which a number repetition starts in an infinite array stream.

  • Iterate through the array stream and keep track of the numbers encountered.

  • Once a number is repeated, return the index of the first occurrence of the repeated number.

  • Use a hash set or a dictionary to efficiently check for duplicates.

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Q6. What are html tags

Ans.

HTML tags are used to define the structure and content of a web page.

  • HTML tags are enclosed in angle brackets, like <tag>.

  • They are used to define elements such as headings, paragraphs, images, links, etc.

  • Attributes can be added to tags to provide additional information or styling.

  • Example: <h1>This is a heading</h1>

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Q7. Experience at prev company

Ans.

I have 3 years of experience at my previous company working on developing web applications using Java and Spring framework.

  • Developed web applications using Java and Spring framework

  • Collaborated with team members to design and implement new features

  • Participated in code reviews and testing processes

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Interview Process at NSE.IT

based on 6 interviews
1 Interview rounds
Coding Test Round
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