Interview questions

JAVA interview questions – page 55

2,804 questions. Tap “Show answer” to check yourself.

  1. What is PSTN ?

  2. What is the difference between overloading and overriding?

  3. What is difference in between Java Class and Bean?

  4. What is abstract method?

  5. What is the difference between Vector, Array and Arraylist?

  6. If a class is declared without any access modifiers, where may the class be accessed?

  7. Is it advisable to depend on finalize for all cleanups

  8. What is RMI Profile

  9. What configuration files are used in Struts?

  10. What is Serialization and Deserialization?

  11. What is the SimpleTimeZone class?

  12. Where the CardLayout is used?

  14. What are the tiers in J2EE architecture?

  15. What are the differences between C++ and Java

  16. What is JFC?

  17. What JDK release does the JMS API need?

  18. What is the difference between BytesMessage and StreamMessage?

  19. What is MIDlets Suite?

  20. Who was involved with Sun in the creation of the specification of Java Message Service 1.0.2?

  21. What is a modular application? What does module-relative mean?

  22. What is ServerSocket. How will you create a connection?

  23. Can you explain passivation / activation?

  24. Will there be a performance penalty if you make a method synchronized? If so, can you make any design changes to improve the performance

  25. What is Difference between AWT and Swing?

  27. What is OTA?

  28. What is class loader?

  29. What is final method?

  30. What is EDGE ?

  31. What is a memory footprint? How can you specify the lower and upper limits of the RAM used by the JVM? What happens when the JVM needs more memory

  32. How would you declare a SingleThreaded servlet

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