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?

1031

What is the significance of java packages?

1106

What are three types of loops in java?

1136

Which types of exceptions are caught at compile time?

1034

What is final keyword in java?

1021

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?

983

What is meant by anonymous class?

1025

How objects are stored in java?

1033

Can a class have multiple constructors?

1059

Describe different states of a thread.

1005

What are the various access specifiers for java classes?

1056

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

1096

Is string a data type in java?

1020

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?

1101

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

1052

Post New Core Java Questions

Un-Answered Questions { Core Java }

What is the class in java?

1014

What is the difference between post and put?

1066

What is the default execution method in java?

1201

Can a constructor have different name than a class name in java?

1194

What loop means?

955

What is final access modifier in java?

1147

Is a method a function?

1062

What does || || mean in math?

940

Explain how can you debug the Java code?

1070

What is the use of singleton?

965

What is java jit compilers?

1011

Explain jdk, jre and jvm?

974

What class allows you to read objects directly from a stream?

1320

Which collection is thread safe in java?

991

Is string a class?

1034

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