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 18199

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

Flextronics,

1 5343

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

6 9368

explain System.out.println

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

107 201874

What is the use of Getters and Setters method ?

4 16984

What is hard code & soft code?

Cognizant, Wipro,

7 61395

jdbc drivers?

Wipro,

8 15738

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

College School Exams Tests, JVA, TCS, Wipro,

8 18313

what is difference Between Core Java and advance java

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

60 176320

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

3 6628

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

2 5776

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 6563

what is the difference between statis block and static variable

7 11418

Can we call the Thread.sleep in Synchyronozed block?

Logica CMG,

5 19209

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

Logica CMG,

2 7363

Post New Core Java Questions

Un-Answered Questions { Core Java }

How to display all the prime numbers between 1 and n (n is the number, get the input from user)

980

What do you understand by java?

988

Does list maintain insertion order java?

915

What is an iterator java?

1108

How to implement a multithreaded applet?

2672

What is Garbage Collection in Java

1084

What is the use of default method in interface in java?

1009

What are the ways to instantiate the class class?

1104

Is java a security risk?

1043

Can you make a constructor final in Java?

1133

What is the purpose of the finalize() method?

1246

Is Java a dying language?

1084

Define "Access specifiers" in java.

1170

what is comparable and comparator interface?

996

What is difference between class and object in java?

1077

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