C# programming is descendent of the previous C programming and is to be pronounced as See Sharp. Numerous developers are using the C# programming language. It’s supposed to be a sophisticated, convenient programming language for a broad array of applications. The .Net Framework, led by Anders Hejlsberg, was credited for its invention. C# 5.0, which was again released on August 15, 2012, is perhaps the latest edition. This programming language is widely used by developers all around the world as it is more convenient and has a very easy syntax compared to C and C++ programming. When an individual goes for an interview, employers and hiring managers are hunting for professionals who have the knowledge and ability to execute what is demanded of them, not someone who has an amazing portfolio. Since you are making preparations for a C# interview, here are a few sample C# Prgramming Interview Questions being asked.
C# Prgramming Interview Questions
- What is the C# programming language?
C# (pronounced “see sharp”) is a Microsoft object-oriented programming (OOP) paradigm for the.NET platform that has also been certified by ISO and ECMA. This was first issued in 2002. C# has improved considerably ever since, with the most current edition being C# 6.0. It was created for Windows, but thanks to the Mono project, it was swiftly converted to Linux and Mac OS X. C# has become open-source software and operates upon on cross-platform .NET Base platform.
- In C#, what is the difference between a “Struck” and a “class”?
A reference type that enables inheritance is said to be a class. Its variables are maintained on Heap, which is by nature accessible to the public. Inheritance is not permitted by the value type Struck. Its properties are maintained on Stack, which is by default private.
- In C#, what are the various forms of classes?
In C#, there are several different types of classes:
Partially shared class: Allows members to be shared or divided across multiple .cs files. The term Partial is used to identify it. Sealed class: A sealed class is something that could not be inherited. To gain access to the members of a sealed class, we must first create the class’s object. The phrase Sealed is very often used to identify it.
Abstract class: The term “abstract class” refers to a type of class whose object cannot be constructed. The class can only be passed down via the generations. It must include at least one technique. The term “abstract” is also used to describe it.
Static Class: A static class is something that doesn’t enable inheriting. The class’s members are fixed. The keyword static is used to identify it. This keyword instructs the compiler to look for any instances of the static class that may have been created by accident.
- In C#, what are classes and objects?
C# is an object-oriented program, and classes are the building blocks of it. A class is a representation of the data structure, as well as how information is secured and maintained within a system. A class is defined with its attributes, functions, and other entities. Objects are genuine entities with specific features that are produced using class instances. These classes specify the object’s kind.
- Is it possible to run several catch blocks?
No, several catch blocks of the same kind cannot be executed at the same time. Control is handed to the final block when the correct catch code has been completed, and then the code that precedes the final block is performed.
- Can you explain the difference between public, static, and void?
Declared public variables and methods can be accessed from anywhere in the project. Without generating an instance of the class, static declared variables or methods are globally available. By default, static members are not globally available; however, this can be changed depending on the type of access modification employed. The method’s address is a recruit as the entry point, and the compiler utilizes this information to start execution before any objects are generated. And Void is a type modifier that specifies that the method or variable returns null.
- What exactly are Jagged Arrays?
The phrase “jagged Array” refers to an array having elements of the typed array. The elements can arrive in a variety of shapes and sizes. An Array of Arrays is another name for jagged Array.
- What is the relationship between the ref and out parameters?
A ref argument must be initialized before being provided to a method, whereas an out parameter doesn’t have to be created before even being passed to a method.
- In C#, what is the purpose of the ‘using’ statement?
The ‘using’ block is very often used to retrieve a resource, process it, and then dispose of it when the block’s execution is complete.
- What was the difference between “method overriding” and “method overloading”?
The technique of generating two or more methods/functions with the same name but different parameters in the same class is known as method overloading. Modify or alter the number of variables and the data source of the parameters to achieve so. Early Binding, Compile Time Polymorphism, and Static Binding are all components that make up this strategy.
The process of creating a method in the derived class with the same signature and name as the base class is known as method overriding. Runtime Polymorphism, Dynamic Polymorphism, and Late Binding are all terms used to describe this strategy.
- In C#, what are delegates and what are their different types?
Delegates are type-safe objects that store procedure instructions rather than information. They can define their type attributes. The many types of delegates in C# are listed below.
Single delegates: A single delegate is used to call only one method.
Multicast delegates: The + and – operators are used to invoking several methods on an existing delegate instance using the Multicast Delegate. The methods, on the other hand, will be called in the order in which they were assigned.
Generic delegate: Generic Delegate is a type of delegate that can be used to call a single method without having to define the delegate instance. Generic delegates are divided into three categories: Function, Action, and Predicate.
- In C#, explain the difference between dynamic type variables and object type variables?
The function of both Dynamic and Object Type Variables is type checking during the application life cycle. They do, however, check at different times. Type checking is handled by Dynamic Type Variables at runtime, while type checking is handled by Object Type Variables at compile time.
Classify the “protected internal” accessibility multiplier?
Inner independent variables that are secured are available both within the same assembly and from classes that derive from this parent class.
- What makes the System. String and System.Text.Are String Builder classes different?
System. Strings are unchangeable. When we change the value of a string variable, the existing memory allocation is released and fresh memory is allocated to the new value. System. String Builder was created with the idea of a mutable string that can be used for several operations without requiring a separate memory address for the updated string.
- What are the advantages and disadvantages of generics in C#?
Generics allow programmers to create a class or function that can work with nearly any data type. As a result, the definition of the programming element’s data types is postponed until it is required. Generics in C# include the following features:
It ensures that code is type-safe, performant, and repeatable. Reflection allows you to acquire real-time information about the types used in a generic data type during runtime.
You can write your generic methods, classes, interfaces, delegates, and events with it.
- In C#, what are three ways to pass parameters to a method?
Value parameters, Reference parameters, and Out parameters are the three types of parameters that can be passed to a C# method.
Value Parameters: Type Parameters or Passing Parameters – Value parameters are also known as “Passing Value-Type Parameters” or “Passing Parameters.” It occurs when a variable is supplied as a value type, which contains its data rather than the normal reference. Also, when the user modifies the value type parameter, the data that was previously recorded as an argument is not reflected. You can also use the ‘ref’ or ‘out’ keywords to change the original data. Reference Parameters: Instead of generating a new storage place, this function reads the argument’s memory location and gives it as a parameter. In this scenario, a change in value may have an impact on the argument.
Out Parameters: Whenever a method returns several values, it uses out parameters. It can pass even if it isn’t declared or initialized. In the method parameter list, it could also use the var type. However, the name of the Out argument does not have to be the same in both the function definition and the call.
- What is circular reference known for?
A circular reference occurs when two or more assets are interdependent on one another, resulting in a lock condition and rendering the resources useless.
Here are few questions which will help you out prepare for the C# programming interview other than the application type questions.