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 3 only   Line 3 and Line 4   Line 1 and Line 4   Line 1 only   Line 4 only   Hint Half-n-half Clue   2. The control expression in an "if" statement must be:   an expression with type boolean   an expression with either the type boolean or integer   an expression with either the type boolean or integer with value 0 or 1   an expression with type integer   Half-n-half Clue   3. With javadoc, which of the following denotes a javadoc comment?   //#   //**   /**   /*   Half-n-half Clue   4. 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());   (C) and (D)   (A), (B), (C) and (D)   (B), (C) and (D)   (B) and (D)   Half-n-half Clue   5. Consider the following code: int i = 1; switch(c)   output will be One, followed by Two, and then followed by Three   code is illegal and therefore will not compile   output will be One followed by Two   output will be One   Half-n-half Clue   6. 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   7. Which error does the following code contain: class Class1   Class Class1 has not been declared public   Class1 should be declared as abstract   Method func1() must be declared as static   There is no error   Half-n-half Clue