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

Core Java Interview Questions

Questions Answers Views Company eMail

What is garbage collection in Java, and how can it be used ?

Accenture, HCL, Infosys, Sara, SITS, TCS, Wipro,

32 94831

Differentiate Vector and ArrayList?

Max Telecom, Wipro,

6 28381

Differentiate constructor and a method and how are it be used?

Wipro,

7 29055

What is an abstract class?

DBS, Wipro,

8 27494

How can final class be used?

Accenture, Wipro,

5 27265

By what default value is an object reference declared as an instance variable?

Wipro,

1 26400

Java support what type of parameter passing ?

Wipro,

7 19916

Explain the term serialization?

Wipro,

10 30997

Is there is any error if you have multiple main methods in the same class?

Infosys, Wipro,

10 33147

What is Overriding and how can it be used?

Consagous, Wipro,

7 32975

Explain pass by reference and pass by value?

IBM, Wipro,

8 32179

In which way does a Primitive data type is passed ?

Sun Microsystems,

5 25254

What happens when a main method is declared as private?

DELL, Infosys, L&T, Sun Microsystems,

22 73580

Is there any need to import java.lang package?

Sun Microsystems,

13 25137

What is UNICODE?

3 8440

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Un-Answered Questions { Core Java }

What is exception handling in java?

989

What is google full form?

967

Highest level event class of the event-delegation model?

3960

Explain illegalmonitorstateexception and when it will be thrown?

1050

What is binary search in java?

950

What is the difference between math floor and math round?

982

What is scanner in java?

915

What is difference between Heap and Stack Memory?

994

What is application tier?

1055

How do you bind variables?

1032

When will you define a method as static?

1044

What is java util collection?

1010

What if I write static public void instead of public static void in java?

1037

What are the benefits of operations?

905

What does t in java mean?

953

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