Online Test

:

 

If an expression contains double, int, float, long, then whole expression will promoted into which of these data types?


Which of these is returned by operators &, ?


Which three are methods of the Object class?

  1. notify();
  2. notifyAll();
  3. isInterrupted();
  4. synchronized();
  5. interrupt();
  6. wait(long msecs);
  7. sleep(long msecs);
  8. yield();

What would be the signature of a method myfunc() that :

1. Has a double array as a formal parameter 

2. Returns an array of integers.


Which of these is an incorrect Statement?


Which of these events will be notified if scroll bar is manipulated?


What is the value stored in x in following lines of code?
int x, y, z;
x = 0;
y = 1;
x = y = z = 8;


Which of the following package stores all the standard java classes?


What is Truncation is Java?


Which of the following is correct way of importing an entire package ‘pkg’?


You want subclasses in any package to have access to members of a superclass. Which is the most restrictive access that accomplishes this objective?


Which of the following are Java reserved words?

  1. run
  2. import
  3. default
  4. implement

Which is a valid keyword in java?


A _________ is a basic unit of storage in Java.


What allows the programmer to destroy an object x?


Which of these packages contains the exception Stackoverflow in Java?


Which of this access specifies can be used for a class so that its members can be accessed by a different class in the same package?


Which three are valid method signatures in an interface?

  1. private int getArea();
  2. public float getVol(float x);
  3. public void main(String [] args);
  4. public static void main(String [] args);
  5. boolean setFlag(Boolean [] test);

Which of these occupy first 0 to 127 in Unicode character set used for characters in Java?


Which of these is necessary condition for automatic type conversion in Java?


What will be the output of the program?

public class Foo 
{  
    public static void main(String[] args) 
    {
        try 
        { 
            return; 
        } 
        finally 
        {
            System.out.println( "Finally" ); 
        } 
    } 
}

Which class does not override the equals() and hashCode() methods, inheriting them directly from class Object?


You need to store elements in a collection that guarantees that no duplicates are stored and all elements can be accessed in natural order. Which interface provides that capability?


What are the pillars of OOPS concept?


 What is the output of this program?

 class booloperators {
        public static void main(String args[]) 
        {
            boolean var1 = true;
        boolean var2 = false;
        System.out.println((var2 & var2));
        } 
    }
 

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