Which is faster array or arraylist?
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Can we put null key in hashmap?
Mention the data structures which are used in graph implementation.
Explain the priority queue?
Why is data structure important?
Define the term “percolate down”?
Is hashtable better than dictionary?
What are the major data structures used in the rdbms?
Why is arraylist faster than linkedlist?
What is the best case complexity of bubble sort?
Is arraylist faster than array?
What does enum do?
“int a[] = new int[3]{1, 2, 3}” – This a legal way of defining the arrays?