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 only   Line 3 and Line 4   Line 4 only   Line 1 and Line 4   Line 3 only   Hint Half-n-half Clue   2. Which javadoc tag is used to denote a comment for a method parameter?   @param   @parameter   @value   @method   @argument   Half-n-half Clue   3. 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   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. Which error does the following code contain: class Class1   Class1 should be declared as abstract   Method func1() must be declared as static   There is no error   Class Class1 has not been declared public   Half-n-half Clue   6. 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");   "x is positive" and "x is negative"   "x is positive"   None of these   "x is negative"   Half-n-half Clue   7. Which of the following expressions will produce errors upon compilation? (A) boolean a = (boolean) 1; (B) boolean b = (false && true); (C) float y = 22.3;   (A)   (A), (C) & (D)   (A), (B) & (D)   (A) & (C)   Half-n-half Clue