1. To print the value of a variable "x" of type int, which of the following expressions can be used: (A) System.out.println("x = " + x); (B) System.out.println("x = " + String.valueOf(x)); (C) System.out.println("x = " + Integer.toString(x)); (D) System.out.println("x = " + (new Integer(x)).toString());   (A), (B), (C) and (D)   (B), (C) and (D)   (B) and (D)   (C) and (D)   Hint Half-n-half Clue   2. Are there any errors in the following class definition? abstract class Class1   Class header definition is wrong   Method definition is wrong   Constructor needs to be defined   No errors   Half-n-half Clue   3. Which javadoc tag is used to denote a comment for a method parameter?   @value   @method   @argument   @parameter   @param   Half-n-half Clue   4. What will be the output of the following program? class Main2   XXX followed by YYY   Error. Won't compile   YYY   XXX   Half-n-half Clue   5. What will be the output of the following program? class Main1   Error. Won't compile   XXX   XXX followed by YYY   YYY   Half-n-half Clue   6. Which lines of the following will produce an error? 1. byte a1 = 2, a2 = 4, a3; 2. short s = 16; 3. a2 = s; 4. a3 = a1 * a2; (The lines are numbered only for illustration in this question.)   Line 4 only   Line 3 and Line 4   Line 3 only   Line 1 only   Line 1 and Line 4   Half-n-half Clue   7. Which of the following command lines options generates documentation for all classes and methods?   -protected   -private   -encoding   -public   -verbose   Half-n-half Clue