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Java networking and algorithm interview questions

  1. What is the difference between an Abstract class and Interface ?

  2. What is user defined exception ?

  1. What do you know about the garbage collector ?

  2. What is the difference between C++ & Java ?

  3. Explain RMI Architecture?

  4. How do you communicate in between Applets & Servlets ?

  5. What is the use of Servlets ?

  6. What is JDBC? How do you connect to the Database ?

  7. In an HTML form I have a Button which makes us to open another page in 15 seconds. How will do you that ?

  8. What is the difference between Process and Threads ?

  9. What is the difference between RMI & Corba ?

  10. What are the services in RMI ?

  11. How will you initialize an Applet ?

  12. What is the order of method invocation in an Applet ?

  13. When is update method called ?

  14. How will you pass values from HTML page to the Servlet ?

  15. Have you ever used HashTable and Dictionary ?

  16. How will you communicate between two Applets ?

  17. What are statements in JAVA ?

  18. What is JAR file ?

  19. What is JNI ?

  20. What is the base class for all swing components ?

  21. What is JFC ?

  22. What is Difference between AWT and Swing ?

  23. Considering notepad/IE or any other thing as process, What will happen if you start notepad or IE 3 times? Where 3 processes are started or 3 threads are started ?

  24. How does thread synchronization occurs inside a monitor ?

  25. How will you call an Applet using a Java Script function ?

  26. Is there any tag in HTML to upload and download files ?

  27. Why do you Canvas ?

  28. How can you push data from an Applet to Servlet ?

  29. What are 4 drivers available in JDBC ?

  30. How you can know about drivers and database information ?

  31. If you are truncated using JDBC, How can you know ..that how much data is truncated ?

  32. And What situation , each of the 4 drivers used ?

  33. How will you perform transaction using JDBC ?

  34. In RMI, server object first loaded into the memory and then the stub reference is sent to the client ? or whether a stub reference is directly sent to the client ?

  35. Suppose server object is not loaded into the memory, and the client request for it , what will happen?

  36. What is serialization ?

  37. Can you load the server object dynamically? If so, what are the major 3 steps involved in it ?

  38. What is difference RMI registry and OSAgent ?

  39. To a server method, the client wants to send a value 20, with this value exceeds to 20,. a message should be sent to the client ? What will you do for achieving for this ?

  40. What are the benefits of Swing over AWT ?

  41. Where the CardLayout is used ?

  42. What is the Layout for ToolBar ?

  43. What is the difference between Grid and GridbagLayout ?

  44. How will you add panel to a Frame ?

  45. What is the corresponding Layout for Card in Swing ?

  46. What is light weight component ?

  47. Can you run the product development on all operating systems ?

  48. What is the webserver used for running the Servlets ?

  49. What is Servlet API used for connecting database ?

  50. What is bean ? Where it can be used ?

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

  52. Can we send object using Sockets ?

  53. What is the RMI and Socket ?

  54. How to communicate 2 threads each other ?

  55. What are the files generated after using IDL to Java Compilet ?
 

 

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