What is the output of the following code snippet? System.out.println(5 + 10 + "Hello");

The output of the given code snippet, System.out.println(5 + 10 + "Hello");, is indeed 15Hello.

In this expression, the operators are evaluated from left to right. The first operation is the addition of the integers 5 and 10, resulting in 15. At this point, you have a string concatenation situation starting with the number 15. The next part of the expression is the string "Hello".

When an integer (15) is followed by a string ("Hello") with the + operator, Java performs string concatenation. Therefore, it takes the integer result and converts it to a string, effectively giving you "15Hello".

This string concatenation behavior with the + operator is key to understanding the output. The other options do not represent the correct output because they either present the concatenation in the wrong order or include numbers inappropriately as part of the finalized string output.