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's the difference between an abstract class and interface in java?

991

What is the significance of java packages?

1072

What are three types of loops in java?

1069

Which types of exceptions are caught at compile time?

986

What is final keyword in java?

979

I want my class to be developed in such a way that no other class (even derived class) can create its objects. How can I do so?

940

What is meant by anonymous class?

981

How objects are stored in java?

992

Can a class have multiple constructors?

968

Describe different states of a thread.

946

What are the various access specifiers for java classes?

1016

Can we call the constructor of a class more than once for an object?

1048

Is string a data type in java?

983

I want to control database connections in my program and want that only one thread should be able to make database connection at a time. How can I implement this logic?

1056

Can we have two methods in a class with the same name?

1000

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Un-Answered Questions { Core Java }

What is meant by flickering?

1037

What is number data type in java?

960

What is difference between stringbuffer and string?

908

What are the 8 data types in java?

949

Convert Binary tree to linked list.

1024

What is constructor chaining and how is it achieved in java?

1079

Why for each loop is used?

969

What is the SimpleTimeZone class?

2221

What is re-factoring in software?

990

Define how destructors are defined in java?

978

What is an example of a constant variable?

1023

What is passing parameters in java?

993

Differentiate between class and structure.

1073

What is the platform?

954

What is threaded programming and when is it used? : Java thread

1027

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