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 17988

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

Flextronics,

1 5273

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

6 9217

explain System.out.println

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

107 199401

What is the use of Getters and Setters method ?

4 16875

What is hard code & soft code?

Cognizant, Wipro,

7 61098

jdbc drivers?

Wipro,

8 15422

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

College School Exams Tests, JVA, TCS, Wipro,

8 18054

what is difference Between Core Java and advance java

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

60 175036

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

3 6508

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

2 5664

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 6470

what is the difference between statis block and static variable

7 11208

Can we call the Thread.sleep in Synchyronozed block?

Logica CMG,

5 19051

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

Logica CMG,

2 7288

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Un-Answered Questions { Core Java }

whatis Home interface and Remoteinterface? with example?

1960

Can a static method be overridden in java?

984

What are the 5 types of research methods?

1109

What is the difference between heap memory and stack memory?

1028

Can we make a constructor final?

980

What is an example of a keyword?

1037

What is isa relationship?

992

Explain the difference between an Interface and an Abstract class?

1136

Is list ordered in java?

933

Which is the best approach for creating thread ?

1154

What is constructor chaining in java?

1032

When will you define a method as static in Java?

1007

What is the final keyword in java?

1386

How many types of flags are there?

975

What is class forname?

965

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