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 the access scope of a protected method?

1032

Can an interface be defined inside a class?

1062

Is java a pure object oriented language?

965

Can a class be declared as protected?

1014

What is collection api?

1057

Does the order of public and static declaration matter in main method?

1072

Can you create an object of an abstract class?

1022

How many static init can you have?

1216

What does it mean that a method or field is “static”?

975

Can a source file contain more than one class declaration?

995

Can you give few examples of final classes defined in java api?

1006

What restrictions are placed on method overloading?

1178

Can a abstract class be defined without any abstract methods?

1006

What is the diffrence between inner class and nested class?

1092

Can a main method be declared final?

1057

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Un-Answered Questions { Core Java }

When should you make a function static?

989

what are the disadvantages of indexes in oracle?

2557

Which category the java thread do fall in?

999

What is the purpose of the system class in java?

1048

What is the main purpose of serialization in java?

1034

What about method local inner classes or local inner classes in java?

1060

How many bytes is string in java?

1252

What is the purpose of static keyword in java?

963

In Java list the methods that can be overridden?

1012

How big is a gigabyte?

1045

What is concurrent hashmap and its features?

1096

What does snprintf return?

1001

Wha is the output from system.out.println(“hello”+null); ?

1145

when should you use stringbuilder class in a program?

983

What is the difference between assignment and initialization?

1051

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