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

Core Java Interview Questions

Questions Answers Views Company eMail

wht is mean by dirty read?

1 8511

what is the difference between Java Command Line and C command Line?

2 9613

In Inheritence concept, i have a static method in super class and i am inheriting that class to one sub class.in that case the static method is inherited to sub class or not????

Accenture,

12 17621

Q1.A. Write note on “The class path Environment Variable”? B. Which are different kinds of source code? Q2.A. How to create an interface? B. Why convert an applet to an application? Q3.A. How to use Media tracker Class. B. How to use string tokenizer class. Q4 A. Explain the overview of UDP messaging. B. Difference between SQL Exception class and SQL Warning class. Q5. A. How to create com object in Java? B. Write short notes on “The properties class” Q6. A. When object is created and destroyed? B. Explain the JDB in depth & command line. C. Write short notes on Web Sites.

iGate, Seed Infotech,

2 8525

what are the oops concept in java explain with real time examples

Accenture, Bosch, Consummate Technologies, CTS, Current Technologies, iNautix, Infosys, Kekran Mekran, QA InfoTech, RTRT, SofTech, Tech Mahindra, Thorogood, Timios, Wipro,

24 199859

what is difference between Exception and Error?

36 95423

what is difference between colection and collections?

Amdocs, IBM, Infosys, Ipog Software, Polaris, Tech Mahindra,

25 71853

Why we can not force Garbage Collection?

7 14970

I have a class which is abstract which contains only the abstract methods. This is similar to an interface. Then, if i have given a choice to choose one of them. Which one i have to choose and why?

4 7413

How multipleInheritance is possible in java?

Satyam,

18 23142

explain me with a code snippet about the generation and handling of null point exceptions.

1 4516

We have two methods to create methods the threads. 1. Implementing runnable interface 2. Extending to thread class and overriding run method. Among these two which one is better and why? Please explain me in detail.

2 6273

When we can access the static data member without creating the object what is the need of the object in java.

Airhub, ssinformatics,

5 9276

whst is encapsulation?when u encpsulate actually while devoloping code?

Amdocs, MGL,

7 9698

what is the messsage u r going to get from an objectoriented programing?

MGL,

2104

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Un-Answered Questions { Core Java }

What are inbuilt functions?

994

What is the difference between the paint() and repaint() methods in java programming?

1188

What does opcode mean?

1085

What is java in simple terms?

1001

Can you sort a list in java?

982

Is char * a string?

993

how to know the total memory occupied by the objects in the ArrayList(Array list may contain duplicate objects)

2340

How do I convert a string to an int in java?

1073

Can we override the static methods?

1033

What is the full meaning of java?

1042

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

2123

Why you should not use singleton?

982

What is difference between static class and normal class?

1119

What is meant by 'bit masking' in java?

1189

Can we declare a constructor as final?

1314

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