C# DataType MCQs

Question 41: What will be the output of the following program?

public static void Main()
{
	dynamic num = 100;
	
	num = "Hello World!!";
	Console.WriteLine( num.GetType().Name);
}

Answer: D

Here, num is a dynamic type, so it escapes type checking at the compile-time; instead, it resolves type at run time. Thus, its type at runtime would be based on the value assigned to it last time.

Question 42: What is the following type?

(int id, string fName, string lName) person = (1, "James", "Bond");

Answer: B

It is an example of the ValueTupe of C# 7.0. You need to include NuGet package System.ValueTuple in order to use it in your project. Learn C# ValueTuple