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 cloneable interface?

8 18509

How many methods does cloneable interface contains?

6 11042

What is a compilation unit?

2 4379

What is a default package ?

7 11493

What is a layout manager?

1 3838

What is a native method?

2 5307

What is a reflection package?

2 5465

What is a serializable interface?

4 7942

What is a stream? what are the different types and classes of Streams?

2 8187

What is unicode?

1 4862

What is a void return type?

6 20426

What is adapter class?

12 53393

What is an Iterator interface?

2 5748

What is an abstract class and abstract method?

5 15835

What is an enumeration class?

2 5963

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Un-Answered Questions { Core Java }

What is the memory leak in java?

983

Tell me the latest versions in java related areas?

1053

What is hashmap and map?

973

How to find the given number is a prime number or not by getting input from the user

1042

Is java a digit method?

955

Is the empty set a singleton?

929

Explain the private protected method modifier?

918

What is the purpose of static methods and static variables?

1012

When to use runnable interface vs thread class in java?

941

How can we use primitive data types as objects?

915

What is meant by class loader? How many types are there? When will we use them?

928

What is the size of a string in java?

951

What is ternary operator? Give an example.

1035

Can singleton class be cloned?

1015

What are the default and parameterized constructors?

1029

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