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

Core Java Interview Questions

Questions Answers Views Company eMail

Explain JPA in Java.

1 312

Briefly explain the term Spring Framework

1 347

Difference between static methods, static variables, and static classes in Java.

1 404

What is a Java Virtual Machine?

1 361

. Define Copy Constructor in Java

1 353

Can Java be said to be the complete object-oriented programming language

1 339

Define Wrapper Classes in Java.

1 304

Define package in Java.

1 307

. Differentiate between instance and local variables.

1 332

. Explain Java String Pool.

1 331

What happens when the main() isn't declared as static?

1 339

Why is Java a platform independent language?

1 371

Why is the main method static in Java?

1 374

What part of memory - Stack or Heap - is cleaned in the garbage collection process?

1 375

What is the difference between the program and the process?

1 358

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Un-Answered Questions { Core Java }

What are static methods?

794

What is the difference between the direct buffer and non-direct buffer in java?

771

What is meant by local variable and instance variable?

808

is it possible to instantiate the math class?

706

What are the advantages of passing this into a method instead of the current class object itself?

1395

What is a key in java?

703

What do you understand by abstract classes?

821

Is null an object java?

737

What is an inner class in java?

709

how come we know the object is no more used in the class?

5950

Why synchronization is important?

779

Explain the differences between abstraction and encapsulation?

767

Explain different forms of polymorphism?

855

What is string buffer?

715

What is thread safe java?

688

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