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Interview Questions


Frequently Asked Java Interview Questions


Question for Professions

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 ?
  • What is servlet? How are Servlets and JSP Pages related?
  • What are Predefined variables or implicit objects?
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