Freecharge Interview Questions, Process, and Tips

Q1. Leetcode easy, medium question
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Q2. Rotate Array, three sum
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Q1. Springboot, Java 8 , microservices, design patterns
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Basic problem for developing an app with certain requirements

Q1. CTO round for technical
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Q1. Employment terms and salary
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JAVA,SQL,Testing Parameters

Q1. Concept of oops
Ans. 
Object-oriented programming paradigm that focuses on objects and classes for code organization and reusability.
• Encapsulation: Bundling data and methods that operate on the data into a single unit (object)

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

• Polymorphism: Ability to present the same interface for different data types
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Q2. Code to move 0's to extreme right position
Ans. 
Code to move 0's to extreme right position in an array of strings
• Iterate through the array and move all 0's to the end of the array

• Use two pointers approach to swap elements

• Example: Input array ['1', '0', '3', '0', '5'], Output array ['1', '3', '5', '0', '0']
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Q1. OOps,Hashmaps,Concept of Polymophism,Inheritance etc.
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Q2. Java collections
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Q1. Basic personality review and your past carrer experience. Since i was a campus candidate they asked me about working in my college projects.
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Q1. Write a program to read a file
Ans. 
Program to read a file in backend development
• Use a programming language like Python, Java, or C++ to open and read the file

• Use file handling functions to read the contents of the file

• Handle exceptions for file not found or permission issues

• Close the file after reading to free up system resources
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1st Round.
Two DS problem from leetcode.
1.Array next permutation
2. Max share profit

Q1. OOPS, Threads, System Design
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