172 
What creates the appropriate DateFormat object and adds a day to the Date object? 
(A) 
(B)  
(C) 
(D) 

168 What is the result when method testIfA is invoked? (A) True (B) Not true (C) An exception is thrown at runtime. (D) Compilation fails because of an error at line 12. (E) Compilation fails because of an error at line 19.

169 Which two statements are true about the result if the default locale is Locale.US? (Choose two.)  1. The value of b is 2.  2. The value of a is 3.14.  3. The value of b is 2.00.  4. The value of a is 3.141.  5. The value of a is 3.1415.  6. The value of a is 3.1416.  7. The value of b is 2.0000. (A) 13 (B) 24 (C) 47 (D) 36

170 What is the result? (A) Compilation fails. (B) After line 15, the value of age is 5. (C) After line 15, the value of age is 3. (D) An exception is thrown at runtime.

171 What is the result? (A) a b c (B) 1 2 3 (C) a1b2c3 (D) a1 b2 c3 (E) Compilation fails. (AB) The code runs with no output. (AC) An exception is thrown at runtime.

173 What is the result? (A) int Long (B) Short Long (C) Compilation fails. (D) An exception is thrown at runtime.

174 What is the result if this code is run on December 14, 2000? (A) The value of s is 14-dic-2000. (B) The value of s is Dec 14, 2000. (C) An exception is thrown at runtime. (D) Compilation fails because of an error in line 13.

複選題175 Which two scenarios are NOT safe to replace a StringBuffer object with a StringBuilder object? (Choose two.) (A) When using versions of Java technology earlier than 5.0. (B) When sharing a StringBuffer among multiple threads. (C) When using the java.io class StringBufferInputStream. (D) When you plan to reuse the StringBuffer to build more than one string. (E) Enitiation of separate design processes to the separation of users

177 What is the result? (A) 0 (B) 1 (C) 4 (D) Compilation fails. (E) An exception is thrown at runtime.

178 Which change can you make to Target without affecting Client? (A) Line 4 of class Target can be changed to return i++; (B) Line 2 of class Target can be changed to private int i = 1; (C) Line 3 of class Target can be changed to private int addOne(){ (D) Line 2 of class Target can be changed to private Integer i = 0;

185 Which statement is true? (A) The equals method does NOT properly override the Object.equals method. (B) Compilation fails because the private attribute p.name cannot be accessed in line 5. (C) To work correctly with hash-based data structures, this class must also implement the hashCode method. (D) When adding Person objects to a java.util.Set collection, the equals method in line 4 will prevent duplicates.