ION Group Software Developer Interview Questions, Process, and Tips

2 medium level coding questions with 18 mcq

Q1. Tbey asked to solve one puzzle ,25 men and find 3 winner , one oops question (write code and explain four pillars of oops), one dsa question (how to implement dictionary)
Add your answer

Coding and aptitude both taken on hacker rank platform.

Q1. Asked about my skills and projects. basic oops concept basic dsa approach puzzle questions
Add your answer

Business case study question
there is no correct or wrong answer but we just need to think and answer logically

It had medium level leetcode questions.

Q1. Asked about projects,oops concepts, dsa and some puzzles
Add your answer

Simple aptitude round

Q1. Diff between sql / no sql primary key unique key
Ans. 
SQL uses primary keys to uniquely identify records in a table, while NoSQL databases use unique keys for the same purpose.
• SQL databases use primary keys to uniquely identify each record in a table, typically using an auto-incrementing integer value.

• NoSQL databases use unique keys to achieve the same purpose, but the key can be any unique value, not necessarily an integer.

• In SQL, primary keys are used to enforce entity ...read more
Answered by AI
Add your answer
Q2. They asked a puzzle (top 20 sde puzzle from gfg) and then a Oops problem then basic DSA discussion
Add your answer

Round duration - 120 minutes
Round difficulty - Medium

This was the first round and it consisted of 40 MCQs from aptitude , logical reasoning etc. and 2 programming questions.
The test was on AMCAT platform.
The test was of 2 hours , web-proctored and switching between tabs was not allowed.

Q1. 
Trapping Rain Water in 2-D Elevation Map
You're given an M * N matrix where each value represents the height of that cell on a 2-D elevation map. Your task is to determine the total volume of water that c...read more
Ans. 
Calculate the total volume of water that can be trapped in a 2-D elevation map after rain.
• Iterate over the matrix and find the maximum height on the borders.

• Calculate the water trapped at each cell by finding the difference between the cell's height and the minimum of its neighboring maximum heights.

• Sum up the trapped water for all cells to get the total volume of water trapped.
Answered by AI
Add your answer
Q2. 
Count Ways to Climb Stairs Problem
Given a staircase with a certain number of steps, you start at the 0th step, and your goal is to reach the Nth step. At every step, you have the option to move either on...read more
Ans. 
Count the number of distinct ways to climb a staircase with a certain number of steps using either one or two steps at a time.
• Use dynamic programming to solve this problem efficiently.

• Keep track of the number of ways to reach each step by considering the number of ways to reach the previous two steps.

• Return the result modulo 10^9+7 to handle large outputs.

• Example: For N=4, the distinct ways to climb are {(0,1,2,3,4)}, ...read more
Answered by AI
Add your answer

Round duration - 60 minutes
Round difficulty - Medium

This was the 2nd round and the technical round of the process. It mostly concentrated on puzzles as ION Trading asks a lot of puzzles in its interview round.
The rounds consisted of puzzles, OS , OOPS , DBMS questions.

Round duration - 40 minutes
Round difficulty - Medium

It was the last round and was all about Project discussion and HR questions.