10+ PhonePe Interview Questions and Answers

The .NET Framework is a Windows-only framework, while .NET Core is cross-platform and open-source.

• The .NET Framework is a Windows-only framework, while .NET Core is cross-platform and open-source.

• .NET Framework is a mature framework with a large number of libraries, while .NET Core is a lightweight framework with fewer libraries.

• .NET Framework requires Windows to run, while .NET Core can run on Windows, Linux, and macOS.

• The .NET Framework is not open-source, while .NET Core i...read more

Synchronous means waiting for a task to complete before moving on, while Asynchronous means not waiting for a task to complete before moving on.

• Synchronous operations block the execution of code until the task is completed.

• Asynchronous operations allow the code to continue executing while the task is being completed.

• Synchronous operations are easier to understand and debug, but can cause performance issues.

• Asynchronous operations are more complex, but can improve performance ...read more

Overriding in C# is a feature that allows a derived class to provide a different implementation of a method that is already defined in its base class.

• Overriding is used to achieve runtime polymorphism.

• The method in the derived class must have the same name, return type, and parameters as the method in the base class.

• The 'override' keyword is used to indicate that a method is intended to override a base class method.

• The 'base' keyword is used to call the base class implementat...read more

IIS is a web server software developed by Microsoft. Application pool is a feature in IIS that isolates web applications.

• IIS stands for Internet Information Services and is used to host websites and web applications.

• It is a web server software developed by Microsoft.

• Application pool is a feature in IIS that isolates web applications from each other.

• Each application pool runs as a separate process and has its own set of resources.

• This isolation provides better security, reliab...read more

String is immutable while StringBuilder is mutable.

• String is a sequence of characters that cannot be modified once created.

• StringBuilder is a dynamic object that can be modified without creating a new object.

• String is more memory efficient for small strings while StringBuilder is more efficient for large strings.

• String concatenation creates a new string object each time while StringBuilder modifies the existing object.

• Example: String str = "Hello"; StringBuilder sb = new Stri...read more

MVC is a design pattern for creating web applications, while API is a way to expose functionality of an application to other applications.

• MVC is used for creating web applications that follow the Model-View-Controller pattern

• API is used for exposing functionality of an application to other applications

• MVC is focused on creating user interfaces and handling user input

• API is focused on providing access to data and functionality

• MVC is typically used for server-side rendering of ...read more

Abstraction is the process of hiding complex implementation details and showing only necessary information.

• Abstraction helps in reducing complexity and increasing efficiency.

• It allows us to focus on what is important and ignore what is not.

• For example, a car dashboard is an abstraction as it shows only necessary information like speed, fuel level, etc. and hides the complex workings of the car.

• Abstraction can be achieved through interfaces, abstract classes, and encapsulation...read more

Thread is a lightweight unit of a process that executes instructions concurrently with other threads.

• Threads allow for parallel execution of code.

• They share the same memory space as the process they belong to.

• Thread class is used to create and manage threads.

• Thread synchronization is important to avoid race conditions.

• Examples of multithreaded applications include web servers and video games.

Enum is a value type that represents a set of named constants in C#.

• Enums are used to define a set of named constants that represent a range of values.

• Enums can be used to improve code readability and maintainability.

• Enums can be defined with a specific underlying data type, such as int or byte.

• Enums can have associated values and methods.

• Example: enum Days { Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, Sunday }

• Example: enum Colors : byte { Red = 1, Green = 2, Blue...read more

A class is a blueprint for creating objects, while an object is an instance of a class.

• A class defines the properties and methods of an object

• An object is created from a class using the 'new' keyword

• Multiple objects can be created from a single class

• Objects can interact with each other through their methods and properties

Collection is a group of related objects of the same type that can be accessed and manipulated using methods.

• Collections are used to store, retrieve, manipulate, and communicate aggregate data.

• C# provides several built-in collection types such as List, Dictionary, Queue, Stack, etc.

• Collections can be generic or non-generic, depending on whether they are type-safe or not.

• Collections can be used to improve performance, simplify code, and enhance functionality.