C# Software Developer Interview Questions

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| By Cripstwick

Cripstwick

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Quizzes Created: 636 | Total Attempts: 733,305

Questions: 10 | Attempts: 295 | Updated: Mar 21, 2023

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C# Software Developer Interview Questions - Quiz

Are you planning to become a C# software developer or engineer any time soon? Whether at a big company or you're being interviewed by a potential client, take this sample interview questions to assess your knowledge of C# programming language.

Questions and Answers

1.

Which of the names resonates with C#?
- A.
  
  Dennis Richie
- B.
  
  Grace Hopper
- C.
  
  Anders Heijberg
- D.
  
  Larry Page
Correct Answer
C. Anders Heijberg

Explanation
Anders Heijberg resonates with C# because he is the lead architect of the C# programming language. He played a crucial role in the development and design of C#, making him closely associated with it. The other names mentioned, Dennis Richie, Grace Hopper, and Larry Page, are notable figures in the field of computer science but are not specifically connected to C#.

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2.

Which of the following languages influenced C#?
- A.
  
  Java
- B.
  
  Pascal
- C.
  
  C++
- D.
  
  COBOL
Correct Answer
A. Java

Explanation
C# was influenced by Java. Both languages share similar syntax, object-oriented programming concepts, and a focus on platform independence. C# was developed by Microsoft as part of its .NET framework, and it incorporates many features and ideas from Java, making it easier for Java developers to transition to C#. Additionally, C# borrowed some of Java's libraries and concepts, such as garbage collection and exception handling. This influence from Java helped C# gain popularity among developers familiar with Java, and it has become one of the most widely used programming languages.

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3.

Which is NOT one of the three ways to pass parameters to a method in C#?
- A.
  
  Value Parameters
- B.
  
  Output Parameters
- C.
  
  Model Parameters
- D.
  
  Reference Parameters
Correct Answer
C. Model Parameters
4.

Within the .NET frame, what is used to organize class?
- A.
  
  Namespace
- B.
  
  Java
- C.
  
  Lisp
- D.
  
  GAC
Correct Answer
A. Namespace

Explanation
In the .NET framework, namespaces are used to organize classes. A namespace is a container that holds a collection of related classes, interfaces, and other types. It helps in avoiding naming conflicts and provides a way to logically group and organize code. By using namespaces, developers can easily locate and access the desired classes within a project or application.

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5.

A class member carried out when a class is made is...
- A.
  
  Class indicator
- B.
  
  Constructor
- C.
  
  Cache
- D.
  
  Boolean
Correct Answer
B. Constructor

Explanation
When a class is made, a constructor is called. A constructor is a special member function of a class that is responsible for initializing the objects of that class. It is automatically invoked whenever an object of the class is created. Therefore, the correct answer is "Constructor".

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6.

The execution entry points for a C# console application is...
- A.
  
  Parameter method
- B.
  
  Main method
- C.
  
  0100h method
- D.
  
  Dynamic method
Correct Answer
B. Main method

Explanation
The execution entry point for a C# console application is the Main method. This method is automatically called when the application starts running and serves as the starting point for the execution of the program. It is where the program begins its execution and from where other methods or functions can be called if needed. The Main method typically contains the code that initializes the application, handles user input, and controls the flow of the program.

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7.

What data type does C# support?
- A.
  
  Integer
- B.
  
  Characters
- C.
  
  Boolean
- D.
  
  Real
Correct Answer
C. Boolean

Explanation
C# supports the Boolean data type, which is used to represent true or false values. This data type is commonly used for conditions and decision-making in programming. It allows for logical operations such as AND, OR, and NOT, making it useful for controlling program flow based on certain conditions.

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8.

In C#, how are methods overloaded?
- A.
  
  Having different data types
- B.
  
  Using the same number parameters
- C.
  
  Arranging in sequence of the parameters
- D.
  
  Trying to modify change
Correct Answer
A. Having different data types

Explanation
Methods in C# can be overloaded by having different data types for the parameters. This means that multiple methods with the same name can be created, but they must have different parameter types. This allows for flexibility in method usage, as different data types can be passed as arguments to achieve different functionality. Overloading methods based on parameter data types is a common practice in C# programming.

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9.

C# does not support...
- A.
  
  Boolean
- B.
  
  Operator overloading
- C.
  
  Programming
- D.
  
  Multiple Inheritance
Correct Answer
D. Multiple Inheritance

Explanation
C# does not support multiple inheritance. Multiple inheritance refers to the ability of a class to inherit properties and behaviors from more than one parent class. In C#, a class can only inherit from a single base class, known as single inheritance. This design decision was made to avoid certain complexities and ambiguities that can arise when multiple inheritance is allowed. Instead, C# supports interface implementation, which allows a class to inherit from multiple interfaces and achieve similar functionality as multiple inheritance but with clearer and more manageable code.

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10.

A struct is different from a class because...
- A.
  
  Structs can be inherited
- B.
  
  Structs have poor performance
- C.
  
  Structs are passed by value
- D.
  
  Structs are not stored on stack
Correct Answer
C. Structs are passed by value

Explanation
Structs are passed by value, meaning that when a struct is assigned to a new variable or passed as a parameter to a method, a copy of the entire struct is created. This is different from classes, where the reference to the object is passed instead. This can have implications for memory usage and performance, as creating copies of structs can be more expensive than passing references to classes. However, it does allow for more control over the data and prevents unintended changes to the original struct.

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