Which of the following performs a boxing conversion? int x = 7; Integer x = 7; int x = y + 7; int y = x; None of the other answers are correct Suppose you have the following: String s1 = "Hello"; String S2 = "Hello"; What would be the best way to compare s1 and s2 to see if they match? O if (s1.equals(s2) O if (s1 == $2) if (s2 == s1) if (s1 = s2) 0 if (s2=51) uestion 15 To catch an exception, the code that might throw the exception must be enclosed in a throws block OA catch block. oc try block. OD finally block stack trace O E. What does the following statement do? Scanner scanner new Scanner( new File( "test.txt")); 0 Opens a binary file for input. Opens a binary file for output. O Opens a text file for input. O Opens a text file for output. O None of the other answers are correct