Hey everyone! Hope you're all doing great! 😊

I recently appeared for the HashedIn by Deloitte placement drive conducted at my college, and I’m thrilled to share that I was SELECTED! 🎉 I’m writing this post to walk you through interview rounds, and share some tips that might help you in your journey.

Interview Rounds Overview

Round 1: Online Assessment (90 mins)

This was an online test consisting of three coding questions of varying difficulty levels. While I don’t recall the exact problems, here’s a breakdown of the topics they covered:

1. Candies Allocation Problem (Easy one using greedy Approach ).
2. A Binary String Problem to find the maximum no of ones after flipping all the digits within an continuous range (Medium To Tough Difficulty Level ).
3. A variant of the Problem Related to Next Greater element in an array (Medium Difficulty).

Each question carried points, and I managed to solve All three questions. Consistent Practice, especially from platforms like GFG and Leetcode, helped me perform well.

Round 2: Technical Interview 1 (45-50 min)

The interviewer was extremely friendly and supportive, which helped create a positive atmosphere. The session began with introductions and a brief discussion about my internship experience. Following this, I was given 3-4 DSA questions to solve, after which the interviewer asked a series of DBMS-related questions, including SQL queries.

The questions included:

1. Missing and Repeating element in an Array.
2. Find Pairs whose sum equal to an target sum.
3. Find Longest Palindromic Substring in an Array.
4. Merge K sorted Lists

I solved all four questions, starting with brute force approaches and optimizing them to better and optimal solutions. However, I got slightly stuck while optimizing the fourth problem.

After the coding section, the interviewer asked the following DBMS and Resume related questions:

1. Difference between Unique and Primary key
2. Difference Between Where and Having Clause.
3. What Are SQL Commands
4. SQL query related questions which involved some basic DDL queries.
5. what are React Hooks (Since I mentioned React in my resume).
6. How does JWT Authentication Works.

I was able to answer all the questions, and the interviewer seemed satisfied with my responses.

Round 3: Technical Interview 2 (1 hr 10min)

This round began with my basic introduction, after which the interviewer asked me to explain one of my projects. I described an e-commerce application I built using Next.js. Since the project utilized a MongoDB database, the interviewer delved into a discussion about SQL vs. NoSQL databases. Following this, I was asked to write a query using both SQL and NoSQL.

Next, I was given a DSA problem based on the graph data structure:

Given a 2D matrix containing a source node, a target node, and some blocked nodes, find the longest path from the source to the target.

I solved this problem using DFS (Depth First Search).

Afterward, I was tasked with designing a database for a restaurant table booking application. This included:

1. Database design with proper schema.
2. Creating an ERD (Entity-Relationship Diagram).
3. Writing queries for all the requested features.

With the interviewer's guidance and my preparation in database design, I successfully completed this task.

Round 4: HR/Managerial Interview (20 min)

This was the final round, and it primarily consisted of common HR questions along with a few situation-based questions. Some of the key questions I was asked include:

1. From which place do I belong?
2. A brief introduction about my family.
3. What can I bring to HashedIn?
4. Why should they hire me?
5. What do I know about HashedIn?

In addition to these, I was presented with 2-3 situation-based questions, which I answered confidently.

Finally, the results were declared, and I was thrilled to be among the 7 students offered a position by HashedIn from my campus. 🎉

I would like to thank my mentors, peers, and seniors who guided me throughout my preparation journey. Their support and advice were invaluable. I am also grateful to the HashedIn by Deloitte team for providing such a wonderful opportunity and conducting the process so smoothly.