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ION Group SDE Interview Questions and Answers

Updated 15 Sep 2024
Asked in
SDE Interview

Q1. what data structure you would use to store phone number along side with names

Ans.

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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SDE Interview

Q2. What is OOPs? And its properties

Ans.

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 only the necessary features.

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SDE Interview

Q3. what is a trie

Ans.

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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SDE Interview

Q4. SNAKE AND LADDER PROBLEM

Ans.

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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Discover ION Group interview dos and don'ts from real experiences
Asked in
SDE Interview

Q5. PUZZLE PROBLEM OF GFG

Ans.

The puzzle problem of GFG involves solving a challenging puzzle on GeeksforGeeks.

  • Read the problem statement carefully and understand the requirements.

  • Break down the problem into smaller subproblems if possible.

  • Try different approaches and algorithms to solve the puzzle.

  • Test your solution with different test cases to ensure correctness.

  • Optimize your solution if possible to improve efficiency.

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Asked in
SDE Interview

Q6. 4 pillars of OOPS

Ans.

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 overloading and method overriding

  • Abstraction: Hiding the compl...read more

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