What is difference between “is” and “as” operators in c#?

C# Interview Questions and Answers,You Need To Know

• What is C#?
• What is an object in c#?
• What are C# attributes and their significance?
• What is the meaning of instantiation in c#?
• How will you differentiate between a Class and a Struct in c#?
• What is the difference between public, static, and void in c#?
• What’s a multicast delegate in c#?
• How do I calculate someone’s age in C#?
• What is the difference between public static, public and static methods in c#?
• What is a Virtual Method in C#?
• List down the fundamental OOP concepts in c#?
• Compare Virtual methods and Abstract methods in c#
• What are Namespaces in C#?
• Is every abstract function virtual in C#, in general?
• What are I/O classes in C#? Define some of the most commonly used ones
• What is the difference between SessionState and ViewState in c#?
• What’s the difference between a method and a function in c#?
• What is the difference between an abstract function and a virtual function in c#?
• What is an interface class? Give one example of it
• What is the advantage of interface class?
• Explain the process of inheriting a class into another class?
• What is the difference between an interface and abstract class?
• What are circular references?
• What is the advantage of abstract class?
• What happens if the inherited interfaces have conflicting method names?
• What is Constructor in C#?
• Explain some points related to the constructor?
• What is difference between “is” and “as” operators in c#?
• Why can’t you specify the accessibility modifier for methods inside the interface?
• What are Value types and Reference types in C#?
• What are Jagged Arrays in c#?
• Is elements of jagged array must be initialized before its use
• Why Doesn’t C# Allow Static Methods to Implement an Interface?
• What do you understand by regular expressions in C#? Write a program that searches a string using regular expressions
• What is the difference between ref & out parameters in c#?
• What is the difference between var and dynamic in C#
• What is the use of ‘using’ statement in C#?
• What is the major use of ‘using’ keyword in c#?
• What is the difference between String and string in C#?
• What is function overloading in c#?
• Explain some ways of doing overloading function in C#
• What is serialization?
• Explain Inheritance in C# with an example?
• What is the best way to give a C# auto-property an initial value?
• List down the reason behind the usage of C# language
• What are Custom Exceptions?
• What is Managed or Unmanaged Code in c#?
• Explain the features of C#?
• What is the difference between constant and readonly in C#?
• Can we use “this” command within a static method?
• Explain Deadlock?
• illustrate Race Condition?
• What is Thread Pooling?
• Distinguish between finally and finalize blocks?
• What is Boxing and Unboxing in C#?
• What is enum in C#?
• Describe Accessibility Modifiers in C#
• What is the difference between ‘protected’ and ‘protected internal’?
• How do short-circuited operators work?
• What is the “volatile” keyword used for?
• Why do we use Async and Await in C#?
• Explain different states of a thread in C#?
• What are delegates?
• What is the difference between “continue” and “break” statements in C#?
• What can you tell us about the XSD file in C#?
• What are Custom Control and User Control?
• What are sealed classes in C#?
• What is the difference between Array and Arraylist?
• Can a private virtual method can be overridden?
• What are Properties in C#?
• What are accessors?
• What are the differences between System.String and System.Text.StringBuilder classes?
• Why Properties are introduced in C#?
• What is the difference between the dispose and finalize methods in C#?
• What are partial classes?
• What’s the difference between the System.Array.CopyTo() and System.Array.Clone() ?
• What are the advantages of partial classes?
• What is the difference between late binding and early binding in C#?
• What are the differences between IEnumerable and IQueryable?
• What is Reflection in C#?
• Give an example of removing an element from the queue?
• What is the difference between directcast and ctype?
• How to implement a singleton design pattern in C#?
• What is the difference between the “throw” and “throw ex” in .NET?
• List down the commonly used types of exceptions in .net?
• How can we sort the elements of the Array in descending order?
• What is a Hashtable in C#?
• What is Multithreading with .NET?

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• C# Interview Questions and Answers,You Need To Know

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