Software Developer Interview Questions (.Net)

C# Programming, Asp .Net MVC, Entity Framework, Design Patterns and Unit Testing Interview Questions

What you'll learn

Preparing for C# interviews

Preparing for ASP .Net MVC interviews

Preparing for Entity Framework interviews

Preparing for Design Patterns interviews

Preparing for Unit Test interviews

Requirements

Have basic knowledge of programming

Description

This course is designed to guide .Net developers in interviews. The most commonly asked questions have been selected. At the beginning of the chapter, there are video contents with short answers to the questions. You will also have access to a more detailed explanation of the questions and code examples. Remember, the interviewer may not be satisfied with the short answer to the question asked of you and may ask for more details and ask you to write code samples.For example:Explain the concept of exception handling in C#.What does a finally block do?How you handle exceptions in Asp .Net MVC projects?Write me a custom exception for ….?At the end of the training, you will know the answer to this and many other related questions. For this reason, we strongly recommend that you read all the articles and write your own examples. Thus, you will not only have memorized, but you will learn the subject in all its details. We tried to stay away from unnecessary details as much as possible and tried to explain the subject in a plain language enough to understand it from all sides. We have emphasized the important points again at the end of the article. This course will provide you with self-confidence and success in your interviews. Good luck.

Overview

Section 1: C# Interview Questions - Part 1

Lecture 1 Short Answers

Lecture 2 What is C#?

Lecture 3 What is the difference between C# and .NET?

Lecture 4 What is the difference between value types and reference types in C#?

Lecture 5 Explain the concept of boxing and unboxing in C#.

Lecture 6 What are the different access modifiers in C#?

Lecture 7 What is an interface in C#?

Lecture 8 Can you inherit multiple interfaces in C#?

Lecture 9 What is the difference between abstract classes and interfaces in C#?

Lecture 10 What is the purpose of using the 'sealed' keyword in C#?

Lecture 11 Explain the concept of polymorphism in C#.

Lecture 12 What are the different types of polymorphism in C#?

Lecture 13 What is an abstract class in C#?

Lecture 14 Can you create an instance of an abstract class in C#?

Lecture 15 What is a delegate in C#?

Lecture 16 What is an event in C#?

Lecture 17 What is the difference between a class and a struct in C#?

Lecture 18 Explain the concept of garbage collection in C#.

Lecture 19 How can you force garbage collection in C#?

Lecture 20 What is the difference between a finalizer and a destructor in C#?

Lecture 21 Explain the 'using' statement in C#.

Lecture 22 What is the purpose of the 'as' operator in C#?

Lecture 23 What is the 'is' operator used for in C#?

Section 2: C# Interview Questions - Part 2

Lecture 24 Short Answers

Lecture 25 Explain the concept of anonymous types in C#.

Lecture 26 What is the 'var' keyword in C#?

Lecture 27 What is the purpose of the 'dynamic' keyword in C#?

Lecture 28 What is the difference between 'const' and 'readonly' in C#?

Lecture 29 Explain the concept of exception handling in C#.

Lecture 30 What are the different types of exceptions in C#?

Lecture 31 How can you create custom exceptions in C#?

Lecture 32 What is the purpose of the 'finally' block in exception handling?

Lecture 33 Explain the difference between 'throw' and 'throw ex' in C#.

Lecture 34 What is the difference between 'out' and 'ref' parameters in C#?

Lecture 35 Explain the concept of method overloading in C#.

Lecture 36 What is a lambda expression in C#?

Lecture 37 What are the different types of collections in C#?

Lecture 38 What is the difference between List and ArrayList in C#?

Lecture 39 Explain the concept of LINQ in C#.

Lecture 40 What is the difference between IQueryable and IEnumerable in LINQ?

Lecture 41 What is a thread in C#?

Lecture 42 How can you create and start a new thread in C#?

Lecture 43 What is the purpose of locks in multithreading?

Lecture 44 Explain the concept of synchronization in C#.

Lecture 45 What are the different types of locks in C#?

Lecture 46 What is a deadlock in multithreading?

Section 3: C# Interview Questions - Part 3

Lecture 47 Short Answers

Lecture 48 Explain the concept of asynchronous programming in C#.

Lecture 49 What is the 'async' and 'await' keywords used for in C#?

Lecture 50 What is a task in C#?

Lecture 51 How can you handle exceptions in asynchronous methods?

Lecture 52 Explain the concept of reflection in C#.

Lecture 53 What is the purpose of the 'volatile' keyword in C#?

Lecture 54 What is a property in C#?

Lecture 55 What is the difference between a property and a field in C#?

Lecture 56 Explain the concept of indexers in C#.

Lecture 57 What are extension methods in C#?

Lecture 58 What is the difference between a static class and a singleton class in C#?

Lecture 59 What is the purpose of the 'using' directive in C#?

Lecture 60 Explain the concept of partial classes in C#.

Lecture 61 What is the difference between an abstract class and an interface in C#?

Lecture 62 What is the purpose of the 'base' keyword in C#?

Lecture 63 Explain the concept of operator overloading in C#.

Lecture 64 What are attributes in C#?

Lecture 65 How can you create custom attributes in C#?

Lecture 66 What is the purpose of the 'yield' keyword in C#?

Lecture 67 Explain the concept of covariance and contravariance in C#.

Lecture 68 What are the different types of serialization in C#?

Lecture 69 What is the difference between binary serialization and XML serialization in C#?

Section 4: C# Interview Questions - Part 4

Lecture 70 Short Answers

Lecture 71 Explain the concept of generics in C#.

Lecture 72 What is the 'params' statement used for in C#?

Lecture 73 What is the purpose of the 'checked' and 'unchecked' keywords in C#?

Lecture 74 Explain the concept of inversion of control (IoC) in C#.

Lecture 75 What are the different types of IoC containers in C#?

Lecture 76 What is the purpose of the 'default' statement in C#?

Lecture 77 Explain the concept of events and delegates in C#.

Lecture 78 What is the difference between a shallow copy and a deep copy in C#?

Lecture 79 Explain the concept of 'enum' in C#.

Lecture 80 What is the purpose of the 'extern' keyword in C#?

Lecture 81 What is the difference between a private and a protected access modifier in C#?

Lecture 82 What is the 'nameof' operator used for in C#?

Lecture 83 Explain the concept of string interpolation in C#.

Lecture 84 What is the difference between 'StringBuilder' and 'String' in C#?

Lecture 85 Explain the concept of dependency injection in C#.

Lecture 86 Explain the concept of parallel programming in C#.

Lecture 87 What is the difference between 'lock' and 'Monitor' in C#?

Lecture 88 What is the purpose of the 'Thread.Sleep' method in C#?

Lecture 89 Explain the concept of method hiding in C#.

Lecture 90 What is the difference between 'File' and 'FileStream' in C#?

Lecture 91 What is the purpose of the 'virtual' keyword in C#?

Lecture 92 What is the difference between a static method and an instance method in C#?

Section 5: Asp.Net MVC Interview Questions - Part 1

Lecture 93 What is ASP.NET MVC?

Lecture 94 What are the advantages of using ASP.NET MVC over traditional ASP.NET Web Forms?

Lecture 95 What is the difference between ASP.NET MVC and ASP.NET Web API?

Lecture 96 What is the role of the Model in ASP.NET MVC?

Lecture 97 What is the role of the View in ASP.NET MVC?

Lecture 98 What is the role of the Controller in ASP.NET MVC?

Lecture 99 Explain the concept of Routing in ASP.NET MVC.

Lecture 100 What is the default route template in ASP.NET MVC?

Lecture 101 How can you customize the route template in ASP.NET MVC?

Lecture 102 What is the purpose of the Razor view engine in ASP.NET MVC?

Lecture 103 What are the different types of ActionResult in ASP.NET MVC?

Lecture 104 Explain the concept of TempData in ASP.NET MVC.

Lecture 105 What is the purpose of ViewBag and ViewData in ASP.NET MVC?

Lecture 106 What is the purpose of HTML Helpers in ASP.NET MVC?

Lecture 107 What is the role of ModelState in ASP.NET MVC?

Lecture 108 How can you handle errors in ASP.NET MVC?

Lecture 109 What is the purpose of Filters in ASP.NET MVC?

Lecture 110 Explain the concept of Bundling and Minification in ASP.NET MVC.

Lecture 111 What is the purpose of Data Annotations in ASP.NET MVC?

Lecture 112 How can you enable client-side validation in ASP.NET MVC?

Lecture 113 What is the purpose of the Authorize attribute in ASP.NET MVC?

Lecture 114 How can you implement authentication and authorization in ASP.NET MVC?

Section 6: Asp.Net MVC Interview Questions - Part 2

Lecture 115 What is the purpose of the Global.asax file in ASP.NET MVC?

Lecture 116 What is the difference between TempData and Session in ASP.NET MVC?

Lecture 117 How can you pass data from Controller to View in ASP.NET MVC?

Lecture 118 What is the purpose of Areas in ASP.NET MVC?

Lecture 119 Explain the concept of Partial Views in ASP.NET MVC.

Lecture 120 What is the purpose of Child Actions in ASP.NET MVC?

Lecture 121 What is the purpose of Action Filters in ASP.NET MVC?

Lecture 122 How can you implement caching in ASP.NET MVC?

Lecture 123 Explain the concept of Dependency Injection in ASP.NET MVC.

Lecture 124 How can you implement form validation in ASP.NET MVC?

Lecture 125 What is the purpose of the AntiForgeryToken in ASP.NET MVC?

Lecture 126 What is the difference between Html.Partial and Html.RenderPartial?

Lecture 127 How can you handle multiple submit buttons in a single form in ASP.NET MVC?

Lecture 128 What is the purpose of the Web .config file in ASP.NET MVC?

Lecture 129 What is the purpose of the App_Start folder in ASP.NET MVC?

Lecture 130 What is the purpose of the URL Routing Module in ASP.NET MVC?

Lecture 131 How can you enable attribute routing in ASP.NET MVC?

Lecture 132 What is the purpose of the Web API in ASP.NET MVC?

Lecture 133 What are the different types of HTTP methods supported by ASP.NET Web API?

Lecture 134 What is the purpose of the ApiController class in ASP.NET Web API?

Lecture 135 How can you enable CORS (Cross-Origin Resource Sharing) in ASP.NET Web API?

Lecture 136 What are the different types of response in ASP.NET Web API?

Lecture 137 Explain the concept of HttpResponseMessage in ASP.NET Web API.

Section 7: Entity Framework Interview Questions

Lecture 138 What is Entity Framework (EF)?

Lecture 139 What are the key features of Entity Framework?

Lecture 140 What are the different approaches to working with Entity Framework?

Lecture 141 What is Code First approach in Entity Framework?

Lecture 142 What is Database First approach in Entity Framework?

Lecture 143 What is Model First approach in Entity Framework?

Lecture 144 What is the purpose of DbContext in Entity Framework?

Lecture 145 Explain the difference between DbSet and IQueryable in Entity Framework.

Lecture 146 What is lazy loading in Entity Framework?

Lecture 147 What is eager loading in Entity Framework?

Lecture 148 What are the different types of relationships supported by Entity Framework?

Lecture 149 How do you handle concurrency in Entity Framework?

Lecture 150 What is the purpose of migrations in Entity Framework?

Lecture 151 What is the purpose of the EntityState enumeration in Entity Framework?

Lecture 152 How do you configure entity relationships in Entity Framework?

Lecture 153 What are the different ways to query data using Entity Framework?

Lecture 154 What is the purpose of the Include() method in Entity Framework?

Lecture 155 How do you handle transactions in Entity Framework?

Lecture 156 What are some performance considerations when using Entity Framework?

Lecture 157 What are the different types of inheritance supported by Entity Framework?

Lecture 158 What is the purpose of the DbSet.Local property in Entity Framework?

Lecture 159 How do you implement a many-to-many relationship in Entity Framework?

Lecture 160 Explain the concept of entity tracking in Entity Framework.

Lecture 161 How can you optimize Entity Framework queries for better performance?

Lecture 162 What is the purpose of the DbFunctions class in Entity Framework?

Section 8: Design Patterns Interview Questions - Part 1

Lecture 163 What is the purpose of design patterns?

Lecture 164 Name the three categories of design patterns.

Lecture 165 What is the Singleton design pattern, and how is it implemented in C#?

Lecture 166 Explain the Factory Method design pattern and provide an example of its usage.

Lecture 167 Describe the Builder design pattern and its advantages in C#.

Lecture 168 What is the Prototype design pattern, and how can it be implemented in C#?

Lecture 169 Explain the Adapter design pattern and provide an example of its implementation?

Lecture 170 Describe the Bridge design pattern and provide a scenario where it can be used.

Lecture 171 What is the Composite design pattern, and how can it be implemented in C#?

Lecture 172 Explain the Decorator design pattern and provide an example of its usage in C#.

Lecture 173 Describe the Facade design pattern and its benefits in C#.

Lecture 174 What is the Flyweight design pattern, and how can it be applied in C#?

Lecture 175 Explain the Proxy design pattern and provide a practical use case in C#.

Lecture 176 Describe the Chain of Responsibility design pattern and its implementation in C#

Lecture 177 What is the Command design pattern, and how can it be utilized in C#?

Lecture 178 Explain the Interpreter design pattern and provide an example of its usage in C#

Lecture 179 Describe the Iterator design pattern and provide a scenario where it can be used

Lecture 180 What is the Mediator design pattern, and how can it be implemented in C#?

Lecture 181 Explain the Memento design pattern and provide an example of its implementation.

Lecture 182 Describe the Observer design pattern and its usage in C#.

Section 9: Design Patterns Interview Questions - Part 2

Lecture 183 What is the State design pattern, and how can it be applied in C#?

Lecture 184 Explain the Strategy design pattern and provide an example of its usage in C#.

Lecture 185 Describe the Template Method design pattern and its benefits in C#.

Lecture 186 What is the Visitor design pattern, and how can it be implemented in C#?

Lecture 187 Explain the MVC (Model-View-Controller) design pattern.

Lecture 188 Describe the MVP (Model-View-Presenter) design pattern and its benefits.

Lecture 189 What is the MVVM (Model-View-ViewModel) design pattern?

Lecture 190 Explain the Repository design pattern and provide a practical use case in C#.

Lecture 191 Describe the Unit of Work design pattern and its implementation in C#.

Lecture 192 What is the Dependency Injection design pattern, and how can it be utilized?

Lecture 193 Explain the Inversion of Control (IoC) design pattern and its benefits in C#.

Lecture 194 Describe the Service Locator design pattern and its usage in C#.

Lecture 195 What is the Data Access Object (DAO) design pattern?

Lecture 196 Explain the Business Delegate design pattern.

Lecture 197 Describe the Null Object design pattern and its benefits in C#.

Lecture 198 What is the Template design pattern, and how can it be applied in C#?

Lecture 199 Explain the Active Object design pattern and provide an example of its usage.

Lecture 200 Explain the Lazy Initialization design pattern and its benefits in C#.

Lecture 201 What is the Extension Object design pattern, and how can it be utilized in C#?

Section 10: Unit Testing Interview Questions - Part 1

Lecture 202 What is unit testing?

Lecture 203 What is the purpose of unit testing in software development?

Lecture 204 Explain the difference between unit testing and integration testing.

Lecture 205 What is a test fixture in unit testing?

Lecture 206 What is a test case in unit testing?

Lecture 207 What is the importance of test-driven development (TDD)?

Lecture 208 What is a test double and how is it used in unit testing?

Lecture 209 How do you handle dependencies in unit tests?

Lecture 210 What is code coverage and why is it important in unit testing?

Lecture 211 What is an assertion in unit testing?

Lecture 212 What are the different types of assertions in C# unit testing frameworks?

Lecture 213 Explain the concept of Arrange-Act-Assert (AAA) in unit testing.

Lecture 214 What is a test runner and what is its role in unit testing?

Lecture 215 What is the difference between NUnit and MSTest?

Lecture 216 How do you organize and structure unit tests in C#?

Lecture 217 What are the best practices for writing effective unit tests?

Lecture 218 How do you handle test setup and teardown in unit tests?

Lecture 219 How can you handle asynchronous code in unit tests?

Section 11: Unit Testing Interview Questions - Part 2

Lecture 220 How do you handle exceptions in unit tests?

Lecture 221 Explain the concept of parameterized tests in unit testing.

Lecture 222 What is the role of the [TestInitialize] attribute in MSTest?

Lecture 223 How do you test private methods in C#?

Lecture 224 How do you deal with non-deterministic tests?

Lecture 225 What is a test pyramid and why is it important in unit testing?

Lecture 226 What is test parallelization and how can you achieve it in C#?

Lecture 227 What is test data and how can you generate it for unit tests?

Lecture 228 How do you test code that interacts with a database?

Lecture 229 What is the purpose of the [Fact] attribute in xUnit.net?

Lecture 230 What is the role of the [SetUp] attribute in NUnit?

Lecture 231 What is the difference between a unit test and a system test?

Lecture 232 How do you test code that interacts with external APIs?

Lecture 233 What is the role of the [TestCase] attribute in NUnit?

Lecture 234 How do you mock static methods in C# unit tests?

Lecture 235 How do you handle time-dependent code in unit tests?

Lecture 236 What is the difference between a stub and a mock?

Lecture 237 What is the role of the [TestFixture] attribute in NUnit?

Lecture 238 How do you write a good test name in unit testing?

Any level of software developer or software candidate preparing for an interview