What is enum in C# Interview Questions?
Table of Contents
What is enum in C# Interview Questions?
1. What is Enumeration in C#?
- An enum is a distinct value typewith a set of named constants.
- It is declared by using keyword Enum.
- Every Enum type has an underlying type which can be any integral type except char.
- The first enumerator has the value 0 by default and the value of each successive enumerator is increased by 1.
What are all the C# important topics for an experienced interview?
Following are the topics from C#.NET
- . NET Framework.
- CLR.
- CLS.
- CTS.
- Classes & Objects.
- OOP’s.
- Concepts of OOP’s (Encapsulation, Inheritance, Polymorphism, Abstraction)
- Difference b/w Abstract & Interface.
What is Generics in C# Interview Questions?
Generics refers to the technique of writing the code for a class without specifying the data type(s) that the class works on. It allow you to define type-safe data structures, without committing to actual data types.
Which of the following can be assigned to an enum variable?
Exercise :: Enumerations – General Questions
| A. | Variables cannot be assigned to enum elements. |
|---|---|
| C. | Variables can be assigned only to the first enum element. |
| D. | Values assigned to enum elements must always be successive values. |
| E. | Values assigned to enum elements must always begin with 0. |
Why do we use enum in C#?
In the C# language, enum (also called enumeration) is a user-defined value type used to represent a list of named integer constants. It is created using the enum keyword inside a class, structure, or namespace. It improves a program’s readability, maintainability and reduces complexity.
What is CLR in .NET framework?
The Common Language Runtime (CLR), the virtual machine component of Microsoft . NET Framework, manages the execution of . NET programs. Just-in-time compilation converts the managed code (compiled intermediate language code) into machine instructions which are then executed on the CPU of the computer.
Why generics are used in C#?
Generics allow you to define the specification of the data type of programming elements in a class or a method, until it is actually used in the program. In other words, generics allow you to write a class or method that can work with any data type.
What is advantage of generic in C#?
Generics provide type safety without the overhead of multiple implementations. Generics eliminates boxing and unboxing. There is no need to write code to test for the correct data type because it is enforced at compile time. The need for type casting and the possibility of run-time errors are reduced.
Why do we use enums in C#?
What is advantage of enum?
The benefits of using enumerations include: Reduces errors caused by transposing or mistyping numbers. Makes it easy to change values in the future. Makes code easier to read, which means it is less likely that errors will creep into it.
Can we inherit enum in C#?
Nope. it is not possible. Enum can not inherit in derived class because by default Enum is sealed.
Can enum have methods C#?
C# Does not allow use of methods in enumerators as it is not a class based principle, but rather an 2 dimensional array with a string and value.
What is JIT compiler in C#?
Just-In-Time compiler(JIT) is a part of Common Language Runtime (CLR) in . NET which is responsible for managing the execution of . NET programs regardless of any . NET programming language. A language-specific compiler converts the source code to the intermediate language.
What is multithreading in C#?
Multithreading in C# is a process in which multiple threads work simultaneously. It is a process to achieve multitasking. It saves time because multiple tasks are being executed at a time. To create multithreaded application in C#, we need to use System.
