Difference between hashset and treeset?
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What are the different types of collections?
write a program to accept name & sort them?
Is heap sort adaptive?
Is treeset thread safe?
What is range search?
Can an arraylist be null?
Define a linear and non linear data structure.
Explain the difference between hashset and hashmap?
Convert the following infix expression to post fix notation ((a+2)*(b+4)) -1
Differentiate between collection and collections.
What is difference between arraylist and list?
Explain the principle of quicksort. What is its complexity?