Question: What will be the output? String str = hello, world!; char ch = s.charAt(0); System.out.println(ch+str); str = str.toUpperCase(); System.out.println(str); ch = ch.toUpperCase(); System.out.println(ch);

What will be the output?

String str = "hello, world!";

char ch = s.charAt(0);

System.out.println(ch+str);

str = str.toUpperCase();

System.out.println(str);

ch = ch.toUpperCase();

System.out.println(ch);

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