Wissen Technology DOT NET Developer Interview Questions and Answers

Q1. Explain exceptional handling
Ans. 
Exception handling is a mechanism to handle runtime errors in a program.
• Exception handling helps in gracefully handling unexpected errors in a program.

• It prevents the program from crashing and allows for proper error logging and recovery.

• Commonly used keywords in exception handling are try, catch, finally, and throw.

• Example: try { // code that may throw an exception } catch(Exception ex) { // handle the exception }
Answered by AI
Add your answer
Q2. Explain difference between abstract and interfaces
Ans. 
Abstract classes can have implementation details while interfaces cannot.
• Abstract classes can have both abstract and non-abstract methods, while interfaces can only have abstract methods.

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

• Abstract classes can have constructors, fields, and properties, while interfaces cannot.

• Abstract classes are used when some common functionality ne...read more
Answered by AI
Add your answer
Q3. One coding question on arrays
Add your answer

Q1. Oop questions they will ask
Add your answer
Q2. C# basic string var dymaic out ref
Add your answer
Q3. Sql , dot net
Add your answer

Q1. This round they will ask strategic question
Add your answer
Q2. How you will handle the team , deadlines
Ans. 
I will handle the team by setting clear expectations, delegating tasks effectively, monitoring progress, and providing support as needed.
• Set clear goals and deadlines for the team to ensure everyone is on the same page

• Delegate tasks based on team members' strengths and workload

• Regularly check in with team members to monitor progress and offer assistance if needed

• Adjust deadlines or redistribute tasks as necessary to me...read more
Answered by AI
Add your answer

Give some practical to write code

Q1. Oops concept and sql web api
Add your answer

Q1. What is Entity Framework and how does it function?
Add your answer

This round was easy no need to worry about this however basic mathematics, reasoning, pseudocode, coding mcq all in one test only, simple questions are there we can crack it. Need to practice some basic coding in c, java, python, sql queries, c++ etc., If writing program, means we can write but its mcq there will be some confusion in options so if we good in basic means we can pass it.

Q1. In my case the interview is of half an hour. The Interviewer was nice person at first he verified my college id and ask some personal related questions to come in comfort zone because sometimes if Intervi...read more
Add your answer
Q2. 1. Oops concepts 2. exception handling in java and c# 3. SQL Queries 4. And finally told to share the screen and write one code in java language that is basic only based on methods and inheritance.
Add your answer
Q3. 1. Final Year Project 2. The technologies used in project
Ans. 
My final year project was a web-based inventory management system using ASP.NET and SQL Server.
• Developed a web-based inventory management system using ASP.NET and SQL Server

• Implemented features like user authentication, product management, and order tracking

• Used HTML, CSS, and JavaScript for front-end development

• Integrated payment gateway for online transactions

• Conducted testing and debugging to ensure smooth functioni...read more
Answered by AI
Add your answer

Q1. HR interview is Telephonic call for me in 5 minutes only completed. I only asked questions about training and all that's it. If you pass in first rounds means enough no need to worry about HR Interview.
Add your answer

Q1. Abstract class vs interfaces. What would i choose and why.
Ans. 
Abstract class is used when there is a need for default implementation, while interfaces are used for multiple inheritance.
• Abstract classes can have both abstract and non-abstract methods, while interfaces can only have abstract methods.

• Abstract classes can provide default implementations for methods, while interfaces cannot.

• Interfaces allow a class to implement multiple interfaces, but can only inherit from one abstra...read more
Answered by AI
Add your answer
Q2. Difference between .NET core, .NET framework and .NET
Ans. 
NET core is a cross-platform, open-source framework for building modern, cloud-based, internet-connected applications. NET framework is a Windows-only framework for building Windows desktop applications. NET is a general term encompassing both .NET core and .NET framework.
• NET core is cross-platform and open-source, while .NET framework is Windows-only.

• .NET core is modular and lightweight, allowing for faster performanc...read more
Answered by AI
Add your answer
Q3. Pipelines and Middlewares in .NET. How would i configure them.
Ans. 
Pipelines and Middlewares in .NET are used for request processing and can be configured using middleware components.
• Pipelines in .NET are used to define a series of middleware components that process an HTTP request.

• Middlewares are components that can handle requests and responses in the pipeline.

• To configure pipelines and middlewares in .NET, you can use the 'UseMiddleware' method in the 'Configure' method of the Star...read more
Answered by AI
Add your answer
Q4. Difference between App.Use() and App.Run()
Ans. 
App.Use() is used for adding middleware to the request pipeline, while App.Run() is used for handling the request directly.
• App.Use() is used to add middleware components to the request pipeline.

• App.Run() is used to handle the request directly without passing it to the next middleware component.

• App.Use() is typically used for setting up middleware like authentication, logging, etc.

• App.Run() is used for handling the fina...read more
Answered by AI
Add your answer
Q5. SOLID principles (S and O was asked)
Add your answer
Q6. Dependency Inversion vs Inversion of Control. I had to write examples of constructor injection, method injection with the help of a DBContext file.
Add your answer
Q7. String vs String Builder. Comparision of their mutability, speed, memory allocated, usability. Was provided a use case and asked which one to use and how. String Interpolation. String Manipulation.
Ans. 
String is immutable, while StringBuilder is mutable. StringBuilder is faster and more memory efficient for string manipulation.
• String is immutable, meaning once created, it cannot be changed. StringBuilder is mutable, allowing for efficient string manipulation.

• StringBuilder is faster than String for concatenating multiple strings, as it does not create a new string object each time.

• String uses more memory as it creates...read more
Answered by AI
Add your answer
Q8. Database Normalization (2NF was asked). Was given an sample dataset, asked to normalize and eliminate partial dependency. Given 2 entities Students and Class, establish relationships between them and prepa...read more
Add your answer
Q9. Difference between Unique, Primary Key. Clustered and Non-Clustered Indices.
Ans. 
Unique, Primary Key, Clustered, and Non-Clustered Indices are all used in database management to enforce data integrity and improve query performance.
• Unique constraint ensures that all values in a column are unique, but allows NULL values.

• Primary Key constraint ensures that all values in a column are unique and not NULL. Each table can have only one Primary Key.

• Clustered Index physically reorders the way records in the...read more
Answered by AI
Add your answer
Q10. Prepare an example of JWT authentication and Oauth for an API.
Ans. 
JWT authentication and OAuth example for API
• Implement JWT authentication by generating a token upon user login and including it in the Authorization header of API requests

• Use OAuth for user authorization by obtaining access tokens from a third-party provider like Google or Facebook

• Ensure API endpoints validate JWT tokens and OAuth access tokens before allowing access to resources
Answered by AI
Add your answer
Q11. Difference between $.post and $.ajax.
Ans. 
Both $.post and $.ajax are methods in jQuery used for making AJAX requests, but $.ajax is more versatile and customizable.
• Both $.post and $.ajax are used for making AJAX requests in jQuery.

• $.post is a shorthand method for $.ajax with predefined settings for POST requests.

• $.ajax is more versatile and customizable, allowing for different types of requests and more options.

• Example: $.post('example.php', {data: 'example'},...read more
Answered by AI
Add your answer
Q12. Write a Linq query to fetch data the fastest.(i used iQueryable) Write a Linq query to check if a record exists in the table.(i used ANY)
Add your answer

Q1. Depenency injejction
Add your answer
Q2. Routings
Add your answer