Interview Experience – HashedIn by Deloitte (CTC : 8.1 LPA) | SDE | On-Campus

🧪 Round 1 (Coding Round)

• The round consisted of 3 questions (1 Easy, 1 Medium, and 1 Hard) to be solved within 90 minutes.

Questions:

1. Easy: Sort the characters in a string.
2. Medium: Find the minimum length subarray that contains all distinct elements of the array.
3. Hard: Given an array and an integer T, find the minimum length subarray that contains all its distinct elements at least T times.

• I was able to solve the first two questions within 15 minutes.
• I was also able to derive the correct approach for the third problem, but my solution failed on a few edge test cases.
• Out of 400 students from my college, only 27 were shortlisted for the next round.

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🧪 Round 2 (Technical Interview)

• The interview began with a brief self-introduction.
• I was then given two coding problems and was asked to explain the approach and write the code on paper:
  • LeetCode 136 – Single Number
  • LeetCode 219 – Contains Duplicate II
• Next, I was asked to write an SQL query involving a join between two tables.
• The discussion then moved to my projects, followed by questions related to Spring Boot, as I had used it extensively in my project.
  • Topics included:
    • What is a REST Controller
    • Directory structure of a Spring Boot application
    • Use of XML-based configuration
    • Commonly used annotations
• I was also asked to write code for a simple REST API.
• Finally, I was asked questions on Core Java and Operating Systems, including:
  • What is an interface in Java
  • What is deadlock
  • Methods to prevent deadlock
  • What is Round Robin scheduling
• From my college, only 8 students qualified for the next round.

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🧪 Round 3 (System Design Interview)

• I was asked to design a database schema for a Parking Lot system.
• After completing the initial design, the interviewer gradually introduced new features and requirements, and I had to update the schema accordingly.
• Based on the final design, I was also asked to write SQL queries related to the database.
• This was a long and in-depth interview, lasting approximately 1.5 hours.
• Six students qualified for the final round.

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🧪 Round 4 (Cultural Fitment Round)

• The interview started with a self-introduction.
• I was asked about my strengths and weaknesses.
• I was asked why I chose HashedIn by Deloitte and what interested me about the company.
• The interviewer also asked a few questions about my family background.

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✅ Final Result

• All six students who appeared for the final round received offers.
• There were two types of offers: Intern and Intern + FTE.
• I was offered the Intern one.