1. | 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) |
| |
 Hint
Half-n-half Clue
| |
| |
2. | Which of the following classes are available in the java.lang package?
(A) Stack
(B) Object
(C) Math
(D) Random
(E) String
(F) StringBuffer
(G) Vector |
| | Half-n-half Clue
| |
| |
3. | Which of the following are the wrapper classes?
(A) Random
(B) Byte
(C) Vector
(D) Integer
(E) Short
(F) Double
(G) String |
| | Half-n-half Clue
| |
| |
4. | What will be the content of array variable table after executing the following code?
for(int i = 0; i < 3; i + +)
for(int j = 0; j < 3; j + +)
if(j = i) table[i][j] = 1;
else table[i][j] = 0; |
| | Half-n-half Clue
| |
| |
5. | Given the following code:
class Base { int x = 10; }
class Derived extends Base
{ int x = 20; }
Base b = new Base();
Derived d = new Derived ( );
Base bd = new Derived();
The statement
System.out.println(b.x + " " + d.x + " " + bd.x);
will produce the output |
| | Half-n-half Clue
| |
| |
6. | Which of the following contain error?
(A) int x[] = int[10];
(B) int[] y = new int[5];
(C) float d[] = |
| | Half-n-half Clue
| |
| |
7. | Which of the following methods belong to the String class? |
| | Half-n-half Clue
| |
| |
