HashedIn Interview Experience (On-Campus)

Last Updated : 05 Oct, 2021

Round 1: Coding Assessment

There were three coding questions from medium to hard level.
The first question was based on the circular array. (easy)
The second question was based on the string. (Medium)
The third question was based on the string. Related to the question given in the link. (link – https://www.geeksforgeeks.org/length-of-the-longest-substring-with-every-character-appearing-even-number-of-times/) (Hard)

Out of 422 students, only 45 students were shortlisted for round 2

Round 2: First Technical Interview

In this round, the First interviewer asked me to introduce myself.
In the first 5 mins, I introduce myself to the interviewer.
After that, he asked me about my subject of interest. I told him about the operating system, database, and machine learning.
Then, He asked me about the Operating system concepts ( Virtual memory, paging, and segmentation, page fault, I scheduling algorithms, page replacement algorithms )
I gave all the answers.
After that, he asked me about the database management system concepts (Normalization, which data structure we can use to create a database from scratch?)
First I told them we can use the data dictionary to create a database from scratch but that wasn’t the correct answer, So the interviewer told me that we can use B+ trees to create a database from scratch.
After that, he asked me about the coding question (https://www.geeksforgeeks.org/given-an-array-of-numbers-arrange-the-numbers-to-form-the-biggest-number/)
I wasn’t able to solve that question in the given time.
Then, he asked me another question which was based on the linked list (https://www.geeksforgeeks.org/detect-loop-in-a-linked-list/)
I was able to solve this question. After that, he was done with my interview.

Round 3: Second Technical Round

This round was really cool and the interviewer was also very friendly. This interview was more like a discussion.
The interviewer asked me to create a database of any OTT platform I like.
I choose Amazon prime and created a database design of the same.
So, I started with writing all the features and tables it should have and after that, I build different kinds of relationships between the tables, after creating tables, there were so many faults that have to be resolved so, I normalized the tables and remove the faults with some help of interviewer.
After that, Interviewer asked me different concepts of database (Normalization, concurrent transactions, Rollbacks, ACID properties)
After that, he asked me about different kinds of data structures used in python.
Difference between Array and linked list.
How the linked list is better than an array.
After that, he was done with my interview and asked me if I have any questions. So, I asked questions like how is the work culture at Hashedin and what kind of projects Hashedin works on.

Round 4: HR Round