Is treemap thread safe?
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If we add enum constants to a sorted collection ( treemap , treeset ), what will be the order in which they will be maintained?
Which sorting algorithm is used in collections sort?
How remove all from arraylist?
Which collection allows null values?
What is the difference between array sort () and array sort t >()?
What are the advantage of collection classes over arrays?
How do you find the second largest element in an array of integers?
Can hashset contain duplicates?
What are red-black trees?
How do hash tables work?
What are the major data structures used in the rdbms?
Explain quick sort and merge sort algorithms and derive the time-constraint relation for these.