ION Group SDE Interview Questions, Process, and Tips

There was aptitude ques as well as 2 coding ques asking the dp concepts.

Q1. OOPS concepts were asked
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Q2. 4 pillars of OOPS
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Encapsulation, Inheritance, Polymorphism, Abstraction are the 4 pillars of OOPS
• Encapsulation: Bundling data and methods that operate on the data into a single unit. Example: Class in Java

• Inheritance: Ability of a class to inherit properties and behavior from another class. Example: Parent class and child class relationship

• Polymorphism: Ability to present the same interface for different data types. Example: Method over...read more
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Q3. PUZZLES were asked
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Q4. What is a trie
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A trie is a tree data structure used for storing a dynamic set of strings.
• Trie stands for retrieval tree or prefix tree

• Each node in a trie represents a single character

• Tries are commonly used in autocomplete features and spell checkers
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Q5. What data structure you would use to store phone number along side with names
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Use a hash table to store phone numbers alongside names for quick lookups.
• Use a hash table where the keys are the phone numbers and the values are the corresponding names.

• This allows for constant time lookups of names based on phone numbers.

• Example: {"555-1234": "John Doe", "555-5678": "Jane Smith"}
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2 coding question on DP and stack . And it had Apti mcqs

Q1. What is OOPs? And its properties
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OOPs stands for Object-Oriented Programming. It is a programming paradigm based on the concept of objects.
• Encapsulation: Bundling data and methods that operate on the data into a single unit.

• Inheritance: Ability of a class to inherit properties and behavior from another class.

• Polymorphism: Ability to present the same interface for different data types.

• Abstraction: Hiding the complex implementation details and showing o
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Q2. Puzzle question (Egg drop)
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Q3. Project related questions
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A detailed Case Study was given on some shopping mall.

Q1. Completely related to my projects
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Q1. QUESTION ON DP CONCEPT
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Q2. QUESTION OF BIT MANIPULATION
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Q1. SNAKE AND LADDER PROBLEM
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Snake and ladder is a classic board game where players move their tokens based on the outcome of a dice roll.
• Players take turns rolling a dice and moving their token along the board.

• If a player lands on a ladder, they move up to a higher-numbered square.

• If a player lands on a snake, they move down to a lower-numbered square.

• The first player to reach the final square wins the game.
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Q2. PUZZLE PROBLEM OF GFG
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Was aksed English, logical reasoning and 2 coding questions

Q1. Puzzles, DSA, OS,DBMS
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Q2. MYsql, Software Design
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