OCA

What happens when the following program is compiled and run?

public class MyData {

String name;
int i;
int i2 = 4;
int i3 = i2 / i;

public static void main(String[] args){
MyData md = new MyData();
System.out.print(md.i3);
}
}

What happens when the following program is compiled and run?

public class Employee {

// Primitive data types
double salary;
int age;
boolean isPaid;
char gender = 'm'; // m = male, f = female

public static void main(String[] args){
Employee emp = new Employee();
System.out.print(" " + emp.salary + ",");
System.out.print(" " + emp.age + ",");
System.out.print(" " + emp.isPaid + ",");
System.out.print(" " + emp.gender);
}
}

What will be the result of calling the following method with an input of 2?

1. public int adder( int N ){
2. return 0x100 + N++ ;
3. }

What happens when you attempt to compile and run the following code?

1. public class Logic {
2. static int minusOne = -1 ;
3. static public void main(String args[] ){
4. int N = minusOne >> 31 ;
5. System.out.println("N = " + N );
6. }
7. }

How many String objects are created in the following code?

1. String A, B, C ;
2. A = new String( "1234" ) ;
3. B = A ;
4. C = A + B ;

Which of the following versions of initializing a char variable would cause a compiler error? [Check all correct answers.]

char c = - 1 ;
char c = '\u00FF' ;
char c = (char) 4096 ;
char c = 4096L ;
char c = 'c' ;
char c = "c" ;

What happens when you try to compile and run the following code?
1. public class EqualsTest{
2. public static void main(String args[]){
3. char A = '\u0005' ;
4. if( A == 0x0005L ) {
5. System.out.println("Equal");
6. }
7. else {
8. System.out.println("Not Equal");
9. }
10. }
11. }

In the following code fragment, you know that the getParameter call may return a null if there is no parameter named size:

1. int sz ;
2. public void init(){
3. sz = 10 ;
4. String tmp = getParameter("size");
5. if( tmp != null X tmp.equals("BIG"))
sz = 20 ;
6. }

What would happen if you tried to compile and run the following code?
1. public class EqualsTest{
2. public static void main(String args[]){
3. Long L = new Long( 7 );
4. if( L.equals( 7L ))
System.out.println("Equal");
5. else System.out.println("Not Equal");
6. }
7. }

What would happen if you tried to compile and run the following code?
1. public class EqualsTest{
2. public static void main(String args[]){
3. Object A = new Long( 7 );
4. Long L = new Long( 7 ) ;
5. if( A.equals( L ))
System.out.println("Equal");
6. else System.out.println("Not Equal");
7. }
8. }