Can arraylist have duplicates?
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Which sorting algorithm is best for small data?
How null key is handled in hashmap?
Is arraylist fail fast?
What are the data structures used in RDBMS, Network data model & Hierarchical data model?
What are vectors used for in real life?
What is a vector element?
How efficient is binary search?
Which is faster list or set?
What is the Role of push() and pop() method?
What is data structure geeksforgeeks?
Explain about map and their types?
in tree construction which is the suitable efficient data structure? (Array, linked list, stack, queue)