Test : Java_13

This test contains 10 questions based on Java.
Each question answered correctly awards you 1 point and each incorrect answer has a penalty of -0.25 points, no points are deducted for unattempted answers.

Select Test Type

You Get +1 for each correct answer and -0.25 for each incorrect answer

Time Left - minutes :seconds

Which of the folowing stements are incorrect?

Default constructor is called at the time of declaration of the object if a constructor has not been defined.	Constructor can be parameterized.
finalize() method is called when a object goes out of scope and is no longer needed.	finalize() method must be declared protected.

C

finalize() method is called just prior to garbage collection. it is not called when object goes out of scope.

Which of these operators is used to allocate memory for an object?

malloc	alloc
new	give

C

What is the return type of Constructors?

int	float
void	None of the mentioned

D

Which of these operators can skip evaluating right hand operand?

!	|
&	&&

D

Which of these keywords is used to manually throw an exception?

try	finally
throw	catch

C

Which of these class is used to make a thread?

String	System
Thread	Runnable

C

What is the output of this program?

class box {
        int width;
        int height;
        int length;
    } 
    class mainclass {
        public static void main(String args[]) 
        {        
            box obj = new box();
            System.out.println(obj);
        } 
    }

0	1
Runtime error	Garbage value

D

Which powerful construct is used to solve the problem of multiple inheritance in abstract class

Pointers	Interfaces
Abstract superclass	None of the above

B

Which of these is an invalid declaration of char line 1 :char c1='A'; line 2 :char c2=25; line 3 :char c3=2.9;

line 1	line 2
line 3	line 2 & line 3

C

line 3 will give an error since it can not take decimal values

Which of these interface is implemented by Thread class?

Runnable	Connections
Set	MapConnections

A

Finish Test