C# Strings Aptitude Questions and Answers | Set 4

static void Main(string[] args)
{
    String str1 = "ABC";
    String str2 = "ABC";

    if (str1.CompareTo(str2)==0)
        Console.WriteLine("Both are equal");
    else
        Console.WriteLine("Both are not equal");
}

1. Both are equal
2. Both are not equal
3. Runtime Exception
4. Syntax Error

static void Main(string[] args)
{
	String str = "This is a string";
	int i1 = 0;
	int i2 = 0;

	i1 = str.IndexOf('s');
	i2 = str.IndexOf('s', i1 + 1);

	Console.WriteLine(i1 + " " + i2);
}

1. 3 6
2. Syntax Error
3. Runtime Exception
4. 3 3

1. Yes
2. No

static void Main(string[] args)
{
	String str1 = "Hello ";
	String str2 = "World!";
	String str3;

	str3 = str1.Concat(str2);

	Console.WriteLine(str3);
}

1. Hello World!
2. HelloWorld!
3. Runtime Exception
4. Syntax Error

static void Main(string[] args)
{
	String str1 = "Hello ";
	String str2 = "World!";
	String str3;

	str3 = str1+str2;

	Console.WriteLine(str3);
}

1. Hello World!
2. HelloWorld!
3. Runtime Exception
4. Syntax Error