Java Quiz may actually have two correct answers

Web Development
1

I’m learning Java and I just finished a Java quiz and on this test, there are actually two answers that would be correct , answer 1 and 2.

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(Just in case the copy and paste doesn’t work, here’s the actual text)

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Which of the following lines would throw a compilation error?

  1. char grade_on_test = ‘F’;
  2. double isRaining = false;
  3. String gradeOnTest = “A”;
  4. int balance = -30;

1 and 2 will produce errors as both are incorrect Java, #2 is obvious as true or false is boolean, #1 because you can’t use underscores on variables at all in Java.

Both would produce errors to that effect, so either one would be a correct answer on this quiz to me. Any thoughts on why 2 is the preferred response?

2

If you find an issue with the content, it’s best to contact CS about it. No one from CC is on this forum any longer.

3

As the explanation in your screenshot mentions, the underscores violate best practices and naming conventions for Java, but they won’t cause a compilation error.

Have you tried experimenting with this? Do you get an error if you use underscores? Write a short program with a variable containing underscore(s). Does it compile or not?

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