Unthinkable Solutions Interview Experience | On-Campus 2022

Hello everyone, I have received Intern+FTE offer for the profile of Junior Associate-IT from Unthinkable Solutions, and will be sharing the interview process for the same. There were four rounds in total, consisting of one online coding round held on Hackerearth, two F2F technical interviews, and one HR interview, though it is also possible to have two coding rounds in case you have attempted the test partially correctly.

Round 1 (Online Coding Round):

• Minimum number of jumps to reach end of array.
• Convert the time in 24 hour format to 12 hour format.
• Replace every array element by multiplication of prev and next.

As I had completed three questions correctly in this round, I moved on to the first F2F technical round.

Round 2 (1st F2F Interview): The interview began with a brief introtuction from my side. Then I was asked two coding questions, to determine if a given number is prime or not, and, to inplement power function. Then there was a rapid fire sort of interview, with the interviewer asking these questions:

• Given an array, sort elements on the basis of their count, like elements occuring most frequently at end of array, if count of 2 elements is same, element with lesser value comes first.
• Define Transaction.
• Difference between C++ and Java
• Why is Java better than C++
• Given a tree, give its preorder, postorder and inorder traversal
• What is Graph
• What is Heap
• How to implement Queue using Stack
• Define Hashing
• Difference between interface and abstract class.
• Define interface
• Define garbage collection

2 Maths Puzzles were asked after this.

Round 3(2nd F2F Interview): The interview began with a brief introtuction from my side, and then I was asked about Referential Integrity, ACID properties, and the languages are provided in DBMS. 

• Then I was asked to implement a custom sorting algorithm to sort an array based on some properties associated with its elements without using any inbuilt functions provided by the language. 
• Further, I was provided a binary tree and was asked to traverse it in Preorder, Inorder, and Postorder fashion.

Round 4(HR Interview): The round began with a brief introduction from my side and then the interviewer introduced her as well. 

• Then she asked me about my family, hobbies, how I got interested in Computer Science and Engineering, and about my domains of interest. 
• Then she discussed the salary structure and job hours, ways to reach the office, and all that’s it and she said take your time to accept this offer and finally got the congratulatory mail from her.

Tip: Be comfortable with the basics of Data Structures and Algorithms. It is enough for clearing these rounds.