Oracle job sample paper 4

Oracle job sample paper 4

16. What is the output of the following program

class questionC {
int a;
public int c;
private int c;

void setc(int i) {
c = i;
}

int getc() {
return c;
}
}

class printQuestionC {
public static void main ( String args[ ] ) {
questionC qc = new questionC( );
qc.a = 10;
qc.b = 20;
qc.c = 100;
qc.b = qc.a + qc.c;
System.out.println ( "a, b and c : " + qc.a + ", " + qc.b + ", " + qc.getc());
}
}

(A) a, b and c : 10, 20, 100
(B) a, b and c : 10, 110, 100
(C) a, b and c : 10, 110,
(D) The code does not compile.

17. Which of the following is not true about serialization

(A) Only an object that implements the Serializable interface can be saved and restored
(B) The Serializable interface defines no members
(C) transient variables can be saved by the serialization facilities
(D) static variables are not saved by the serialization facilities

18. What is the output of the following program ?

class Promote {
public static void main ( String args[ ] ) {
byte b 42;
char c = 'a';
short s = 1-24;
int i = 50000;
float f = 5.67 f;
double d = .1234;
double resuot = (f * b) + (i / c) - (d * s);
System.out.println("Result = " + result);
}
}

(A) The code does not compile.
(B) The final result of the expression is a double
(C) The final result of the expression is a float
(D) The final result of the expression is an int

19. Consider the following Java Code

public class Alias {
int i;
Alias(int ii) { i = ii; }
public static void main ( String [ ] args ) {
Alias x = new Alias(7);
Alias1 y = x;
System.out.println("x : " + x.i);
System.out.println("y : " + y.i);
x.i++;
System.out.println("x : " + x.i);
System.out.println("y : " + y.i);
}
}

What will be the output ?

(A) The code does not compile
(B) The code compiles but gives runtime exception
(C) x = 7
y = 7
x = 8
y = 7
(D) x = 7
y = 7
x = 8
y = 8