What is the difference between arraylist and hashmap?
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How does the bubble sort work?
Can a hashmap have duplicate keys?
What are the advantages of selecetion sort?
Which sorting algorithm is worst?
what is the different between B-tree and B+ tree.
Is it possible to store null key and null values in a hashmap?
What is a hashset?
What is difference between data type and data structure?
Define linear probing?
Explain quick sort and merge sort algorithms and derive the time-constraint relation for these.
Define ancestor and descendant ?
How many pointers are necessary to implement a simple linked list?