Why do we use collections?
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What is a weighted graph?
What are the disadvantages of representing a stack or queue by a linked list?
Differentiate between list and map.
Why is arraylist used?
Two linked lists are given, find out the sum of them without altering the linked list?
Why is hashmap not thread safe?
Who created quicksort?
Which is faster array or list?
What is the difference between a hashmap and hashtable?
How do you assign an address to an element of a pointer array ?
What is numeric array?
Describe the types of data structures?