Collections and Generics Ques: 02

Collections and Generics Ques: 02

Click the Exhibit button

Which statement is true about the set variable on line 12?

A. The set variable contains all six elements from the coll collection, and the order is guaranteed to be

preserved.

B. The set variable contains only three elements from the coll collection, and the order is guaranteed to be preserved.

C. The set variable contains all six elements from the coll collection, but the order is NOT guaranteed to be preserved.

D. The set variable contains only three elements from the coll collection, but the order is NOT guaranteed to be preserved.

Answer: D

Collections and Generics Ques: 01

Collections and Generics Ques: 01

Given:

34. HashMap props = new HashMap();

35. props.put("key45", "some value");

36. props.put("key12", "some other value");

37. props.put("key39", "yet another value");

38. Set s = props.keySet();

39. // insert code here

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);

Answer: B