Interview questions

JAVA interview questions – page 47

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

  1. What is DispatchAction?

  2. What is the difference b/w Iterator & ListIterator

  3. Which Container method is used to cause a container to be laid out andredisplayed

  4. What is the difference between a MenuItem and a CheckboxMenuItem?

  5. What is AMPS?

  6. What is WAP-Gateway?

  7. How can we write our own arraylist without using collections?

  8. What is the difference between classpath and path variable?

  9. What is ETSI?

  10. Connecting to a Database and Strings Handling

  11. What is J2ME ?

  12. How can we take various inputs from user as int,char,string,float etc ?

  14. What is runtime polimorphism? give an example program ?

  15. Explain 2 tier and 3 -tier Architecture?

  16. Write program for single objects returns two instances?

  17. I studied that "Abstract class means ,it doesn't maintain the complete information about the particular class". Is it right? Justify?

  18. When we will use an Interface and Abstract class?

  19. What is the notation for matrix in java?

  20. What are wrapped classes?

  21. Tell me the differences between enumeration and iteration? Which can use where in realtime?

  22. What it the root class for all Java classes?

  23. How can you force all derived classes to implement a method present in the base class?

  24. Why do we need interface in Java. Instead of interface we can write the methods in the class itself. Why do we need seperate interface?

  25. How do you sing an Applet?

  27. Meaning - Abstract classes, abstract methods

  28. When exactly a static block is loaded in Java ?

  29. Why multiple inheritance using classes is disadvantage in java

  30. What are the similarities and differences between Java and C/C++?

  31. Why nobody at Sun wants to read the messages sent to java-beans@java.sun.com?

  32. Why ArrayList is faster than Vector?

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