1. Introduction to Collection Framework  
  2. Collection Interface in Java 
  3. Collection Set Interface    
  4. Hashset class in java  
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  6.  
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  9.  
  10.  
  11. Collection List Interface 
  12.  
  13.  
  14.  
  15. Collection Map interface  
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  19. Difference between enumeration and iterator and list iterator? 
  20. Difference between arraylist and vector 
  21. Differences between HashMap and Hash-table  
  22. Convert keys of a map to List 
  23. Convert Values of a map to List 
  24. Comparable vs Comparator 

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