List the differences between comparable and comparator interface?
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What is difference between for loop and foreach?
Why do we use trees in data structures?
Describe tree database.
Describe stack operation.
Can map contain duplicate keys?
Draw a binary Tree for the expression : A * B - (C + D) * (P / Q)
Which is better hashset or treeset?
What are the differences between b tree and b+ tree?
What is collection sort?
How many passes does bubble sort need?
What are the types of collision resolution strategies in open addressing?
Which sorting algorithm is worst?