To answer this question, we need to understand method overloading in C#. Method overloading allows us to define multiple methods with the same name but with different parameters. This enables us to perform different operations based on the arguments passed to the method.

Let's go through each option to understand why it is correct or incorrect:

Option A) Different parameter data types - This option is correct. Method overloading can be achieved by having methods with the same name but with different parameter data types. For example:

void Print(int num)
{
    // Do something with an integer parameter
}

void Print(string text)
{
    // Do something with a string parameter
}

Option B) Different number of parameters - This option is correct. Method overloading can also be achieved by having methods with the same name but with a different number of parameters. For example:

void Sum(int num1, int num2)
{
    // Do something with two integer parameters
}

void Sum(int num1, int num2, int num3)
{
    // Do something with three integer parameters
}

Option C) Different order of parameters - This option is correct. Method overloading can be achieved by having methods with the same name but with a different order of parameters. For example:

void Calculate(int num1, int num2)
{
    // Do something with two integer parameters in a specific order
}

void Calculate(int num2, int num1)
{
    // Do something with the same integer parameters in a different order
}

Option D) All of these - This option is correct. All of the mentioned options are valid ways to overload a method in C#. By combining different parameter data types, different numbers of parameters, and different orders of parameters, we can achieve method overloading.

The correct answer is D) All of these. This option is correct because all the mentioned ways are valid ways to overload a method in C#.

• Thanks
• Wrong explanation

To answer this question, you need to understand the differences between System.Text.StringBuilder and System.String in terms of mutability and efficiency.

Option A) StringBuilder is more efficient when there is a large amount of string manipulation - This option is correct. StringBuilder is designed to be more efficient when there is a need for frequent string manipulation. It provides methods to modify the string without creating a new instance in memory each time.

Option B) Strings are immutable, so each time a string is changed, a new instance in memory is created - This option is correct. System.String objects are immutable, meaning they cannot be changed once created. When you modify a string, a new instance is created in memory.

Option C) StringBuilder is mutable; when you modify an instance of the StringBuilder class, you modify the actual string, not a copy - This option is correct. StringBuilder objects are mutable, meaning they can be modified without creating a new instance. When you modify a StringBuilder object, you modify the actual string it holds.

Option D) Strings are mutable in .Net - This option is incorrect. Strings are immutable in .NET. Once a string is created, it cannot be changed. Any modifications to a string result in the creation of a new string instance in memory.

The correct answer is D) Strings are mutable in .Net. This option is incorrect because strings are actually immutable in .NET.

• Thanks
• Wrong explanation