1. | Which of the following are the wrapper classes? (A) Random (B) Byte (C) Vector (D) Integer (E) Short (F) Double (G) String |
|
Hint
Half-n-half Clue
| |
|
2. | Which of the following contain error? (A) int x[] = int[10]; (B) int[] y = new int[5]; (C) float d[] = |
| Half-n-half Clue
| |
|
3. | When we implement the Runnable interface, we must define the method |
| Half-n-half Clue
| |
|
4. | The methods wait() and notify() are defined in |
| Half-n-half Clue
| |
|
5. | Given the code String s1 = "yes"; String s2 = "yes"; String s3 = new String(s1); Which of the following would equate to true? (A) s1 == s2 (B) s1 = s2 (C) s3 == s1 (D) s1.equals(s2) (E) s3.equals(s1) |
| Half-n-half Clue
| |
|
6. | Which of the following methods belong to the String class? |
| Half-n-half Clue
| |
|
7. | Suppose that s1 and s2 are two strings. Which of the statements or expressions are valid? (A) String s3 = s1 + s2; (B) String s3 = s1 - s2; (C) s1 <= s2 (D) s1.compareTo(s2); (E) int m = s1.length(); |
| Half-n-half Clue
| |
|