HCLTech Product Designer Interview Questions and Answers for Experienced

Q1. Where do we use BigInteger in java ?
Ans. 
BigInteger is used for mathematical operations involving very large integers in Java.
• BigInteger is used when the range of values supported by primitive data types like int and long is not sufficient.

• It is commonly used in cryptography and security applications.

• It provides methods for arithmetic, bitwise, and logical operations on large integers.

• Example: calculating factorial of a large number, generating large prime nu
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Q2. Merge Sort Algo code in java
Ans. 
Merge Sort Algo code in java
• Divide the array into two halves

• Recursively sort the two halves

• Merge the sorted halves

• Time complexity: O(n log n)
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Prepare normal for aptitude - maths, quant, analytic

My GD topic was Is internet good for students or not

I didn't attempt this as I was noob back in third year Engg

Q1. Basic questions can you relocate, tell me about ur GD and composition
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There was one problem solving question based on binary tree concept.
And rest were aptitude test

Q1. What is a binary tree?
Ans. 
A binary tree is a data structure consisting of nodes, each having at most two children.
• Each node has a left and/or right child node

• The left child node is smaller than the parent node, while the right child node is larger

• Used for efficient searching and sorting algorithms

• Examples include binary search trees and Huffman trees
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Q2. Was given a scenario and was asked to solve that with optimized approach
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Q1. Why do you want to join this company?
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