Core Java Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Core Java Interview Questions

Questions Answers Views Company eMail

briefley expalin about the packages

3 4377

explain about method overloading and method overriding with difficult examples

4 7036

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

TCS,

2154

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,

2108

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

Wipro,

6 7869

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 13476

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

TCS,

1 4778

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

2135

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

2041

Where will it be used?

1888

What is the main functionality of the remote reference layer?

1942

How do you download stubs from Remote place?

1709

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

3122

What is the main functionality of Prepared Statement?

4 7477

What is meant by Static query and Dynamic query?

2 6410

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Un-Answered Questions { Core Java }

What data type is true or false?

987

Can we create an object of private class?

911

Which class is the superclass of all classes?

1051

What is an object class?

960

What is the difference between C++ and Java and your preferences?

1061

What is procedure overloading?

2239

What is the size of arraylist in java?

974

Can we have more than one package statement in the source file?

1020

How to sort a collection of custom Objects in Java?

994

What is a singleton class? Give a practical example of its usage.

1041

What is the basic difference between string and stringbuffer object?

1023

How can we break singleton in java?

901

Explain 5 io best practices?

978

Can we override protected method in java?

991

Mention a package that is used for linked list class in java.

901

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