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 4542

explain about method overloading and method overriding with difficult examples

4 7237

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

TCS,

2223

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,

2166

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

Wipro,

6 8187

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 13860

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

TCS,

1 4893

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

2190

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

2123

Where will it be used?

1942

What is the main functionality of the remote reference layer?

1999

How do you download stubs from Remote place?

1791

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

3204

What is the main functionality of Prepared Statement?

4 7690

What is meant by Static query and Dynamic query?

2 6545

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Un-Answered Questions { Core Java }

Which is better singleton or static class?

987

What is appletviewer?

1037

Explain java coding standards for interfaces?

1113

Which eclipse is best for java?

1000

What is java util collection?

1089

Why does java does not support multiple inheritance? Explain

975

What is the difference between heap and stack memory?

1198

What is hashmap in java?

1058

Differentiate between array list and vector in java.

1118

What does opcode mean?

1085

What are inbuilt functions?

994

What are java threads?

1135

Difference between nested and inner classes ?

1133

which class is the wait() method defined in? : Java thread

946

Can we declare a class as abstract without having any abstract method?

1001

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