1. 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 1 and Line 4   Line 3 only   Line 1 only   Line 3 and Line 4   Line 4 only   Hint Half-n-half Clue   2. Determine the output when the value of x is zero: if(x >= 0) if(x > 0) System.out.println("x is positive"); else System.out.println("x is negative");   None of these   "x is negative"   "x is positive" and "x is negative"   "x is positive"   Half-n-half Clue   3. What will be the output of the following program? class Main2   XXX   XXX followed by YYY   YYY   Error. Won't compile   Half-n-half Clue   4. For the following class definition, which is a legal statement to construct an object of type Class1: class Class1 extends Class2   (A)   (C) & (E)   (A) & (B)   (C) & (D)   None of the above   Half-n-half Clue   5. The method int func(int i, int j)   (B) & (C)   (C) & (D)   (A), (B), (C) & (E)   (A), (B) & (E)   None of these   Half-n-half Clue   6. With javadoc, which of the following denotes a javadoc comment?   //**   /*   //#   /**   Half-n-half Clue   7. 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