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	Collections FAQs Q1. What are limitations of object Arrays? Q2. What are differences between arrays and collections? Q3. what are differences between arrays and ArrayList? Q4. What are differences between arrays and Vector? Q5. What is Collection API ? Q6. What is Collection framework? Q7. What is difference between Collections and Collection? Q8. Explain about Collection interface? Q9. Explain about List interface? Q10. Explain about Set interface? Q11. Explain about SortedSet interface? Q12. Explain about NavigableSet ? Q13. Explain about Queue interface? Q14. Explain about Map interface? Q15. Explain about SortedMap ? Q16. Explain about NavigableMap? Q17. Explain about ArrayList class? Q18. What is RandomAccess Interface? Q19. Explain about LinkedList class? Q20. Explain about Vector class? Q21. What is difference between ArrayList and Vector? Q22. How we can get synchronized version of ArrayList? Q23. What is difference between size and capacity of a Collection Object? Q24. What is difference between ArrayList and Linked List? Q25. What are legacy classes and interfaces present in Collections framework ? Q26. what is difference Enumeration and Iterator? Q27. What are limitations of Enumeration? Q28. What is difference between enum and Enumeration? Q29. What is difference between Iterator and ListIterator? Q30. What is relation between ListIterator and Iterator? Q31. Explain about HashSet class? Q32. If we are trying to insert duplicate values in Set what will happen? Q33. What is LinkedHashSet? Q34. Differences between HashSet and LinkedHashSet? Q35. What are major enhancements in 1.4 version of collection frame work? Q36. Explain about TreeSet? Q37. What are differences between List and Set interfaces? Q38. What is Comparable interface? Q39. What is Comparator interface? Q40. What are differences between Comparable and Comparator? Q41. What is difference between HashSet and TreeSet? Q42. What is Entry interface? Q43. Explain about HashMap? Q44. Explain about LinkedHashMap? Q45. Differences between HashMap and LinkedHashMap ? Q46. Differences between HashMap and Hashtable? Q47. What is IdentityHashMap? Q48. What is difference between HashMap and IdentityHashMap? Q49. What is WeakHashMap? Q50. What is difference between HashMap and WeakHashMap? Q51. What is TreeMap? Q52. What is Hashtable Q53. What is PriorityQueue? Q54. What is Arrays class? Q55. We are planning to do an indexed search in a list of objects. Which of the two Java collections should you use: ArrayList or LinkedList? Q56. Why ArrayList is faster than Vector?