COLLECTION

Most Frequently asked Collection Interview Question


How HashMap works internally in Java

Difference between ArrayList and Vector

How HashSet works internally in Java

Difference between Comparable and Comparator

Hashtable vs HashMap



                                                                       
Differences/Comparison                                                                      



Comparator vs Comparable                                                             

ArrayList vs Vector                                                                              

HashMap vs ConcurrentHashMap

HashSet vs TreeSet 

Fail Fast Iterator vs Fail Safe Iterator

Iterator vs Enumeration

 ==  vs equals method

HashMap vs Hashtable




Top 10 Interview Questions :

Top 10 HashSet Interview Questions


Internal Working


Internal working of HashSet  
HashMap internal working