What will be the output of the following C# code?static void Main(string[] args){String obj = "hello";String obj1 = "world";String obj2 = obj;string s = obj+" "+obj1;Console.WriteLine(s.IndexOf('r'));Console.ReadLine();}

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What will be the output of the following C# code?
static void Main(string[] args)
{
String obj = “hello”;
String obj1 = “world”;
String obj2 = obj;
string s = obj+” “+obj1;
Console.WriteLine(s.IndexOf(‘r’));
Console.ReadLine();
}

What will be the output of the following C# code?
static void Main(string[] args)
{
String obj = “hello”;
String obj1 = “world”;
String obj2 = obj;
string s = obj+” “+obj1;
Console.WriteLine(s.IndexOf(‘r’));
Console.ReadLine();
}
a) 7
b) 8
c) 9
d) 10

Answer: b
Explanation: IndexOf() used to find absolute position of a character of substring.
Output:
8

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What will be the output of the following C# code?static void Main(string[] args){String obj = “hello”;String obj1 = “world”;String obj2 = obj;string s = obj+” “+obj1;Console.WriteLine(s.IndexOf(‘r’));Console.ReadLine();}

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What will be the output of the following C# code?
static void Main(string[] args)
{
String obj = “hello”;
String obj1 = “world”;
String obj2 = obj;
string s = obj+” “+obj1;
Console.WriteLine(s.IndexOf(‘r’));
Console.ReadLine();
}