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 7236

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 8186

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 13856

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?

1941

What is the main functionality of the remote reference layer?

1999

How do you download stubs from Remote place?

1790

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 7689

What is meant by Static query and Dynamic query?

2 6544

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Un-Answered Questions { Core Java }

What are static blocks in java ?

1108

Why is inheritance used in java?

1124

Can we convert stringbuffer to string?

1010

What is the console in java?

1158

What is meant by local variable and instance variable?

1018

What is Classloader in Java?

1220

How many types of array are there?

1008

Mention some interfaces implemented by linked list in java.

1022

Is java same as core java?

1099

What is substring in java?

1226

Why are getters and setters used?

1061

Explain about oops concepts.

1123

Convert a BST into a DLL and DLL to BST in place.

1116

Can we override tostring method in java?

971

What are thread priorities and importance of thread priorities in java?

1139

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