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

Core Java Interview Questions

Questions Answers Views Company eMail

String is an immutable object. Then how can the following code be justified. String s1 = ?ABC?; String s1 = s1+?XYZ?; s.o.p(s1); The output is ABCXYZ, which is the value of s1 ?

Flextronics, Keane India Ltd,

6 18255

Instead of writing Home, Remote Interfaces if i directly extends EJBObject to bean class what happens?

Flextronics,

1 5357

when we write class.forName("any one class"); what happens actually?what it will return?explain stepwise?

6 9411

explain System.out.println

Calpine Technologies, Care, Cognizant, CTS, IBM, IBS, LibSys, Oracle, Spiro Solutions, TCS,

107 202448

What is the use of Getters and Setters method ?

4 17015

What is hard code & soft code?

Cognizant, Wipro,

7 61453

jdbc drivers?

Wipro,

8 15803

Can we declare an anonymous class as both extending a class and implementing an interface?

College School Exams Tests, JVA, TCS, Wipro,

8 18382

what is difference Between Core Java and advance java

HCL, HP, Sambalpur University, TCS, Vensai Technologies, Wipro,

60 176797

how cani read a command line argument?(usingfile object).

3 6651

what is the use/perpose of having a method antive?

2 5803

when asub class inherits a super class and overrides a public method of super class in sub class(public method in super class). why these methods needs to be public in sub class. (otherwise compile time error).

3 6590

what is the difference between statis block and static variable

7 11484

Can we call the Thread.sleep in Synchyronozed block?

Logica CMG,

5 19246

how can we use the servlet as standalone apllication?should we need to extend any class?

Logica CMG,

2 7386

Post New Core Java Questions

Un-Answered Questions { Core Java }

how to create daemon thread in java?

1091

What happens if we override only equals?

988

Why main method is static in java?

1192

How is Object Oriented Programming different from Procedure Oriented Programming?

1059

What do you know about the garbage collector in java?

1102

What is a boolean field?

970

Why do we need hashset in java?

1066

What do you mean by constant time complexity?

1267

hr interview how many minutes asking question

2056

How we can declare a static variable?

1122

Are generics important java?

1000

what is difference between equals and ==?

1079

What is synchronization and why is it important in java programming?

956

What does g mean in regex?

1007

What is an example of a constant variable?

1106

For More Un-Answered { Core Java } Questions Click Here