Can we store null in arraylist?
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What is data structure and its types?
Why do we use insertion sort?
What are the advantages and disadvantages of copyonwritearraylist?
What is a string or array type?
Is hashmap a data structure?
Differentiate between hashset and treeset.
Which interface treemap implements?
Of the following tree structure, which is, efficient considering space and time complexities? (a) Incomplete Binary Tree (b) Complete Binary Tree (c) Full Binary Tree (b) Complete Binary Tree.
How will you sort the elements of array in descending order?
What do you mean by selection sort?
How do you find the index of an element in an arraylist?
Describe tree database. Explain its common uses.