195 

What is the result?
(A) 2 1 0
(B) 2 1 1
(C) 3 2 1
(D) 3 2 2
(E) Compilation fails. 

(AB) An exception is thrown at runtime.

191 Which two, inserted at line 11, will allow the code to compile? (Choose two.)   1. public class MinMax＜?＞{  2. public class MinMax＜? extends Number＞{  3. public class MinMax＜N extends Object＞{  4. public class MinMax＜N extends Number＞{  5. public class MinMax＜? extends Object＞{  6. public class MinMax＜N extends Integer＞{ (A) 15 (B) 23 (C) 46 (D) 56

複選題192 Which three code fragments, inserted independently at line 6, will compile? (Choose three.) (A) list.add("foo"); (B) Object o = list; (C) String s = list.get(0); (D) list = new ArrayList＜String＞(); (E) list = new ArrayList＜Object＞();

193 What is the result? (A) apple pear (B) banana pear (C) apple apple (D) apple banana (E) banana banana

194 Which statement is true? (A) The expressions (ONE == ONE) and ONE.equals(ONE) are both guaranteed to be true. (B) The expression (ONE ＜ TWO) is guaranteed to be true and ONE.compareTo(TWO) is guaranteed to be less than one. (C) The Example values cannot be used in a raw java.util.HashMap; instead, the programmer must use a java.util.EnumMap. (D) The Example values can be used in a java.util.SortedSet, but the set will NOT be sorted because enumerated types do NOT implement java.lang.Comparable.

196 What inserted at line 39, will sort the keys in the props HashMap? (A) Arrays.sort(s); (B) s = new TreeSet(s); (C) Collections.sort(s); (D) s = new SortedSet(s);

197  What is the result? (A) A, B, C, (B) B, C, A, (C) Compilation fails. (D) The code runs with no output (E) An exception is thrown at runtime.

198 What is the result? (A) 3, 2, 1, (B) 1, 2, 3, (C) Compilation fails. (D) The code runs with no output. (E) An exception is thrown at runtime.

複選題199 What is the result? (A) The code runs with no output. (B) An exception is thrown at runtime. (C) Compilation fails because of an error in line 20. (D) Compilation fails because of an error in line 21. (E) Compilation fails because of an error in line 23. (AB) Compilation fails because of an error in line 25.

200 Which statement is true? (A) Compilation fails because the hashCode method is not overridden. (B) A HashSet could contain multiple Person objects with the same name. (C) All Person objects will have the same hash code because the hashCode method is not overridden. (D) If a HashSet contains more than one Person object with name="Fred", then removing another Person, also with name="Fred", will remove them all.

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