10+ Dot Net Developer Trainee Interview Questions and Answers

Join is used to combine rows from two or more tables based on a related column between them.

• Types of joins include INNER JOIN, LEFT JOIN, RIGHT JOIN, and FULL JOIN.

• INNER JOIN returns rows when there is at least one match in both tables.

• LEFT JOIN returns all rows from the left table and the matched rows from the right table.

• RIGHT JOIN returns all rows from the right table and the matched rows from the left table.

• FULL JOIN returns rows when there is a match in one of the tables...read more

Functions return a single value while stored procedures can return multiple values. Functions can be called from SQL statements while stored procedures cannot.

• Functions return a single value while stored procedures can return multiple values

• Functions can be called from SQL statements while stored procedures cannot

• Functions cannot modify the database state while stored procedures can

• Functions are used for computations and return values, while stored procedures are used for exe...read more

Interface is a blueprint for a class, while abstract class can have some implementation.

• Interface cannot have any implementation, only method signatures.

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

• Abstract class can have abstract and non-abstract methods, while interface can only have abstract methods.

• Interfaces are used to achieve multiple inheritance in C#, while abstract classes are used to provide a common base for derived classes.

MVC is a software architecture pattern. Partial View is a reusable view. Routing maps URLs to actions. Html helpers generate HTML. Stored Procedures are precompiled SQL statements.

• MVC separates application into Model, View, and Controller

• Partial View is a reusable view that can be included in other views

• Routing maps URLs to actions in the controller

• Html helpers generate HTML code for views

• Stored Procedures are precompiled SQL statements that can be executed multiple times

ASP.NET page life cycle is the series of events that occur from the time a page is requested to the time the page is fully rendered and sent to the client browser.

• Page request is received by the server

• Page is initialized, controls are created and their properties are set

• Page is loaded with data and controls are rendered

• Page is unloaded and disposed

Yes, I have used WebApi in multiple projects to create RESTful APIs for web applications.

• Used WebApi to build RESTful APIs for communication between client and server

• Implemented CRUD operations using WebApi endpoints

• Secured WebApi endpoints with authentication and authorization mechanisms

• Utilized WebApi to integrate third-party services and data sources

Access modifiers are keywords in programming languages that define the accessibility of classes, methods, and other members.

• Access modifiers control the visibility and accessibility of classes, methods, and variables in a program.

• Common access modifiers include public, private, protected, and default (package-private).

• Public access modifier allows a class, method, or variable to be accessed from any other class.

• Private access modifier restricts access to the class or method w...read more

OOPs concepts refer to Object-Oriented Programming principles like Inheritance, Encapsulation, Polymorphism, and Abstraction.

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

• Encapsulation: Bundling data and methods that operate on the data into a single unit.

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

• Abstraction: Hiding the complex implementation details and showing only the necessary features.

Joins in SQL are used to combine rows from two or more tables based on a related column between them.

• Joins are used to retrieve data from multiple tables based on a related column.

• Common types of joins include INNER JOIN, LEFT JOIN, RIGHT JOIN, and FULL JOIN.

• INNER JOIN returns rows when there is at least one match in both tables.

• LEFT JOIN returns all rows from the left table and the matched rows from the right table.

• RIGHT JOIN returns all rows from the right table and the mat...read more

A stored procedure is a precompiled collection of SQL statements that can be executed by calling the procedure name.

• Stored procedures can improve performance by reducing network traffic and increasing security.

• They can be used to encapsulate business logic and promote code reusability.

• Stored procedures are stored in the database and can be called from various applications or scripts.

• Example: CREATE PROCEDURE GetEmployeeDetails AS SELECT * FROM Employees WHERE Department = 'IT...read more

Web.config file is a configuration file used in ASP.NET applications to store settings and configurations.

• Contains settings for the ASP.NET application

• Can include connection strings, authentication settings, and custom error pages

• Located in the root directory of the ASP.NET application

• Can be used to specify custom error pages, session state settings, and more

A class is a blueprint for creating objects, and objects are instances of classes. Constructors are special methods used to initialize objects.

• Class is a template that defines the properties and behaviors of objects.

• Object is an instance of a class that has its own state and behavior.

• Constructors are special methods used to initialize objects when they are created.

• Example: Class 'Car' defines properties like 'color' and behaviors like 'drive'. Object 'myCar' is an instance of...read more

A dangling pointer is a pointer that points to a memory location that has been deallocated, leading to undefined behavior.

• Dangling pointers can occur when a pointer is not set to NULL after the memory it points to is freed.

• Accessing a dangling pointer can result in a crash or unexpected behavior.

• Example: int *ptr = new int; delete ptr; // ptr is now a dangling pointer

ASP.NET is a web application framework developed by Microsoft for building dynamic web sites, web applications, and web services.

• Developed by Microsoft

• Used for building dynamic web sites, web applications, and web services

• Supports multiple programming languages like C# and VB.NET

• Uses server-side scripting to generate dynamic web pages

An interface in programming defines a contract for classes to implement, specifying methods and properties that must be included.

• Interfaces in C# are similar to abstract classes but can only contain method signatures, properties, events, and indexers.

• Classes can implement multiple interfaces, allowing for flexibility in defining behavior.

• Interfaces are used to achieve polymorphism and decouple code, making it easier to maintain and extend.

• Example: public interface IShape { vo...read more