1. If not assigned a value, a variable of type char has the following default value:   " " (space)   '\u0000'   '\u0001'   '\uffff'   Hint Half-n-half Clue   2. Choose the operations that can be performed on String objects: (A) + (B) + = (C) - (D) % (E) ^   (D)/option>   (A)   (A) & (B)   (D) & (E)   None of these   Half-n-half Clue   3. Which of the following is not a hexadecimal number? (A) 999 (B) (hex)23 (C) 0x556 (D) 0x1F2   (A), (B) & (C)   (A) & (B)   (C)   (A)   Half-n-half Clue   4. Of the following functions from the class java.lang.Math, select those that produce a value of 25, when a = 25.7.   (C) & (E)   (C)   (A), (C) & (E)   (D) & (E)   (A)   Half-n-half Clue   5. Given the declarations int x , m = 2000; short y; byte b1 = -40, b2; long n; Which of the following assignment statements will evaluate correctly? (A) x = m * b1; (B) y = m * b1; (C) n = m * 3L; (D) x = m * 3L;   (B) & (C)   (A), (C) & (D)   (A) & (D)   (A) & (C)   (A), (B) & (C)   Half-n-half Clue   6. Select the invalid assignment statements from the following: (A) float x = 238.88; (B) double y = 0x443;   (A) & (C)   (A) & (B)   (B) & (D)   (B)   Half-n-half Clue   7. 15 & 29 = ?   13   12   44   14   Half-n-half Clue