Application Engineer at IDFC First Bank

How it went

What they would tell you

How to prepare

Their background

Round by round

1. 1

   Online Assessment95 min

   There were three sections : Aptitude : 20 questions in 20 minutes (Easy to medium) Technical : 30 questions from core subjects like OOPS , DBMS , CN and OS. Coding : 2 Questions(Both were easy)

   • Find the next Even integer (e.g. n = 10 , res = 12 , n = 11 , res = 12)
   • Given a string of upper case alphabets , find the length of longest substring in which the alphabets are in non increasing order.
   • Find the next Even integer
   • Find the length of Longest Substring
2. 2

   Technical Round 130 min

   This round was totally dependent on interviewer you will get, like some asked dsa and some asked core subjects. The interview started with my introduction and then the interviewer asked the following questions:

   • Pillars of OOPS
   • Types of inheritance
   • Copy constructor
   • Process and thread difference
   • OSI Layers
   • Difference between OSI AND TCP/IP
   • Heap sort algorithm (like how it works , no code)
   • Design a schema for traffic light system
   • Imagine you are given the gps data of every 5 seconds of a vehicle , you need to tell how can you predict whether a vehicle will be stuck in a jam in future or not? (The interviewer told to explain approach)
3. 3

   Technical Round 230 min

   Project Discussion Round In this round , two interviewers were there and they scanned the whole resume of mine.

   • They asked about the internship experience , your learnings and the tech stack.
   • My first project was on Gen AI , so there was a discussion of nearly 10 mins on that project like I was asked to explain each line of code I have written and also about the RAG System
   • Then they jumped to my MERN Stack project in which they asked how will you scale it , how will you improve the searching (indexing) , and 4-5 other questions on it.
4. 4

   Technical Round 38 min

   This was just a basic knowledge round of 10 mins. The interviewer asked about myself and then he introduced himself. Then he asked if you want to design a app for IDFC , which tech stack you will use. Where do you see yourself in 5 years. etc

5. 5

   HR Round39 min

   Started with my introduction and he also introduced himself. Then he asked where I live (home state) and also about the academics Which is your favorite subject? I said Data structures , then he asked to tell one use case of each Data structure you know. Then he gave a problem to design a seat reservation system like he just asked about the tech stack , apis and how will you improve customer experience. Then some basic hr questions like strengths and weaknesses , hobbies and what qualities you expect from team members.

What came up