14. Which statement is correctly declare a variable a which is suitable for refering to an array of 50 string empty object?

A. String [] a

B. String a[]

C. char a[][]

D. String a[50]

F. Object a[50]

15. Give the following java source fragement:

//point x

public class Interesting{

//do something

}

Which statement is correctly Java syntax at point x?

A. import java.awt.*;

B.package mypackage

C. static int PI=3.14

D. public class MyClass{//do other thing…} E. class MyClass{//do something…}

16. Give this class outline:

class Example{

private int x;

//rest of class body…

}

Assuming that x invoked by the code java Example, which statement can made x be directly accessible in main() method of Example.java?

A. Change private int x to public int x

B. change private int x to static int x

C. Change private int x to protected int x

D. change private int x to final int x

17. the piece of preliminary analsis work describes a class that will be used frequently in many unrelated parts of a project

“The polygon object is a drawable, A polygon has vertex information stored in a vector, a color, length and width.”

Which Data type would be used?

A. Vector

B. int

C. String

D. Color

E. Date

18. A class design requires that a member variable should be accessible only by same package, which modifer word should be used?

A. protected

B. public

C. no modifer

D. private

19.Which declares for native method in a java class corrected?

A. public native void method(){}

B. public native void method();

C. public native method();

D. public void method(){native;}

E. public void native method();

20. Which modifer should be applied to a declaration of a class member variable for the value of variable to remain constant after the creation of the object?

21. Which is the main() method return of a application?

A. String

B. byte

C. char

D. void

22. Which is corrected argument of main() method of application?

A. String args

B. String ar[]

C. Char args[][]

D. StringBuffer arg[]

23. “The Employee object is a person, An Employee has appointment store in a vector, a hire date and a number of dependent”

short answer: use shortest statement declare a class of Employee.

24. Give the following class defination inseparate source files:

public class Example{

public Example(){//do something}

protected Example(int i){//do something}

protected void method(){//do something}

}

public class Hello extends Example{//member method and member variable}

Which methods are corrected added to the class Hello?

A. public void Example(){}

B. public void method(){}

C. protected void method(){}

D. private void method(){}

25. Float s=new Float(0.9F);

Float t=new Float(0.9F);

Double u=new Double(0.9);

Which expression?s result is true?

A. s==t

B. s.equals(t)

C. s==u

D. t.equals(u)

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