Core Java Interview Questions
Questions Answers Views Company eMail

briefley expalin about the packages

3 3371

explain about method overloading and method overriding with difficult examples

4 5770

explain the concept of virtual method invocation in polymorphism in detail?

TCS,

1721

Addition to previous section relative word 5th one was Putrid ans: rotten, also there was prob. in 1st section on bucket weight ans:10kg, also there was a prob. on train speed to find bridge length ans:800 mtrs.

V2 Solutions,

1615

we have a 100 classes at that time which class we have to write main method? pls help me

Wipro,

6 6309

class A { public void disp(int a,int b) { System.out.println("hai"); } } class B { public void disp(int a,int b,int c) { System.out.println("hai"); } } above program is overloading or overriding?

Infosys, Wipro,

9 11409

where to use join method and explain with real time senario?and programatical explenation also..

TCS,

1 4072

In a container there are 5 components. I want to display all the component names, how will you do that?

1563

What is the exact difference in between Unicast and Multicast object?

1517

Where will it be used?

1510

What is the main functionality of the remote reference layer?

1420

How do you download stubs from Remote place?

1359

I want to store more than 10 objects in a remote server? Which methodology will follow?

2638

What is the main functionality of Prepared Statement?

4 6234

What is meant by Static query and Dynamic query?

2 5617


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Un-Answered Questions { Core Java }

What is :: operator in java?

512


What is the unit of plancks constant?

575


Which is bigger float or double?

522


What is the exception hierarchy in java?

490


Difference between Linked list and Queue?

613






What do you mean by local class?

519


What is the indent key?

593


What is append function?

572


3.2 Consider the following class: public class Point { protected int x, y; public Point(int xx, int yy) { x = xx; y = yy; } public Point() { this(0, 0); } public int getx() { return x; } public int gety() { return y; } public String toString() { return "("+x+", "+y+")"; } } Say you wanted to define a rectangle class that stored its top left corner and its height and width as fields. 3.2.1 Why would it be wrong to make Rectangle inherit from Point (where in fact it would inherit the x and y coordinates for its top left corner and you could just add the height and width as additional fields)? (1) 8 Now consider the following skeleton of the Rectangle class: public class Rectangle { private Point topLeft; private int height, width; public Rectangle(Point tl, int h, int w) { topLeft = tl; height = h; width = w; } public Rectangle() { this(new Point(), 0, 0); } // methods come here } 3.2.2 Explain the no-argument constructor of the Rectangle class given above. 3.2.3 Write methods for the Rectangle class to do the following: • a toString() method that returns a string of the format "top left = (x, y); height = h; width = w " where x, y, h and w are the appropriate integer values. • an above() method that tests whether one rectangle is completely above another (i.e. all y values of the one rectangle are greater than all y values of the other). For example, with the following declarations Rectangle r1 = new Rectangle(); Rectangle r2 = new Rectangle(new Point(2,2), 1, 4); the expression r2.above(r1) should give true, and r2.above (r2) should give false. (You can assume that the height of a rectangle is never negative.) (2) (5)

2435


What does provide mean construction?

558


What is string :: npos?

583


What is method in research paper?

577


Write a program to check for a prime number in java?

564


What is the difference between heap memory and stack memory?

619


What are class members by default?

663