10+ full stack .net developer Interview Questions and Answers

OOPS is a programming paradigm based on objects, front-end refers to the user interface, back-end refers to server-side programming, and database is where data is stored.

• OOPS stands for Object-Oriented Programming System

• Front-end refers to the part of the application that the user interacts with, such as web pages or mobile apps

• Back-end refers to the server-side programming that powers the application, such as APIs or databases

• Database is where data is stored and retrieved, s...read more

Singleton design pattern ensures a class has only one instance and provides a global point of access to it.

• Ensure a class has only one instance by providing a global access point to it

• Use a private constructor to restrict instantiation of the class

• Provide a static method to access the instance of the class

Use event emitters or callback functions to send data from child to parent component in Angular

• Use @Output decorator in Angular to create custom events in child component and emit data to parent component

• Pass a function as a prop from parent to child component, which child can call to send data back to parent

• Use services to share data between components in Angular

Extension methods allow adding new methods to existing types without modifying the original type.

• Extension methods must be defined in a static class.

• The first parameter of an extension method specifies the type being extended and is preceded by the 'this' keyword.

• Extension methods can be called as if they were instance methods of the extended type.

The new keyword is used in C# to create an instance of a class or structure.

• Used to instantiate objects in C#

• Can be used with constructors to initialize object properties

• Helps in creating instances of classes or structures

Interface defines only method signatures while abstract class can have method implementations.

• Interface cannot have method implementations, only method signatures.

• Abstract class can have method implementations and variables.

• A class can implement multiple interfaces but can inherit only one abstract class.

• Interfaces are used for defining contracts while abstract classes are used for code reusability.

Pipes in Angular are used for transforming data in templates.

• Pipes are used to format data before displaying it in the view

• They can be used for currency, date, uppercase/lowercase transformations, etc.

• Example: {{ birthday | date:'MM/dd/yyyy' }}

A static method is a method that belongs to the class itself, rather than to instances of the class.

• Static methods can be called directly on the class without needing an instance of the class.

• They are commonly used for utility methods that do not require access to instance variables.

• Static methods cannot access non-static members of the class.

• Example: Math.Max() is a static method in the Math class that returns the larger of two numbers.

SDLC is a process followed for software development. Arrays are data structures used to store multiple values. RDBMS is a type of database management system.

• SDLC stands for Software Development Life Cycle and includes phases like planning, designing, coding, testing, and maintenance.

• Arrays are used to store multiple values of the same data type in a single variable. Example: int[] numbers = {1, 2, 3, 4, 5};

• RDBMS stands for Relational Database Management System and is used to ...read more

The 'using' keyword is used in C# to ensure that an object is disposed of properly after use.

• Automatically disposes of resources when they are no longer needed

• Simplifies code by handling cleanup tasks

• Example: using (var file = new FileStream("example.txt", FileMode.Open)) { // code here }

An interface in .NET is a reference type that defines a contract for classes to implement certain methods and properties.

• Interfaces contain method signatures but no implementation.

• Classes can implement multiple interfaces.

• Interfaces are used to achieve abstraction and multiple inheritance in C#.

• Example: public interface IShape { void Draw(); }

Overriding is a concept in object-oriented programming where a subclass provides a specific implementation of a method that is already provided by its parent class.

• Occurs in inheritance when a subclass provides a specific implementation for a method that is already defined in its parent class

• The method in the subclass must have the same name, return type, and parameters as the method in the parent class

• Allows for polymorphism, where a subclass can be treated as an instance of...read more

Life cycle hooks in Angular are functions that are called at specific points in the component's life cycle.

• ngOnChanges: Called when an input property changes

• ngOnInit: Called once the component is initialized

• ngOnDestroy: Called before the component is destroyed