It is one thing to appear for general interviews and another to appear for technical interviews or subject based interviews. These interviews require you to have a thorough knowledge about the various aspects of the subject, to ensure the interviewer that you suit the job.

Listed are some of the most frequently asked ‘Java Interview Questions’:

• What is the difference between procedural and object-oriented programs?-
• What are Encapsulation, Inheritance and Polymorphism
• What is the difference between Assignment and Initialization?
• What is the difference between an Interface and an Abstract class?
• What is the purpose of garbage collection in Java, and when is it used?
• Explain different way of using thread? Describe synchronization in respect to multithreading.
• Difference between Vector and ArrayList?
• What are passby reference and passby value?
• What is HashMap and Map?
• Difference between Swing and Awt?
• What is the difference between a constructor and a method?
• State the significance of public, private, protected, default modifiers both singly and in combination.
• What is static in java?
• What is final?
• What are Class, Constructor and Primitive data types?
• What is a reflection package?
• What is the difference between Integer and int?
• What is the difference between exception and error?
• What is the difference between process and thread?
• What is an applet? What is the difference between applications and applets?
• What is the difference between scrollbar and scrollpane?
• What is a clone able interface and how many methods does it contain.
• What is the difference between String and String Buffer?
• What is an I/O filter? What is BDK?
• What is serialization and deserialization?
• What are JDBCWhat are drivers available? What is the difference between JDBC and ODBC?
• What is a Java Bean? What is a Jar file?
• What is servlet? How are Servlets and JSP Pages related?
• What are Predefined variables or implicit objects?