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 4526

explain about method overloading and method overriding with difficult examples

4 7220

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

TCS,

2218

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 8154

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 13815

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

TCS,

1 4882

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

2186

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

2114

Where will it be used?

1937

What is the main functionality of the remote reference layer?

1995

How do you download stubs from Remote place?

1781

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

3195

What is the main functionality of Prepared Statement?

4 7662

What is meant by Static query and Dynamic query?

2 6532

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Un-Answered Questions { Core Java }

How to create packages in java?

942

What do you understand by copy constructor in java?

929

Is null a keyword in java?

969

Write a function for palindrome and factorial and explain?

1075

What is the difference between sleep and wait in java?

957

Differentiate between overriding and overloading cases?

1101

What are the advantages and disadvantages of object cloning?

1105

What is the difference between preemptive scheduling and time slicing?

1061

Does collectionutils isempty check for null?

1414

What is the purpose of the strictfp keyword?

1156

Does set allows null in java?

954

List down the methods and interfaces of collection class in java.

979

What are parsers? Dom vs sax parser.

1046

Can list contain null in java?

1084

What is constructor and its types?

1140

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