What is data and its type?
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How do you check if a stack is empty or not?
Can hashset contain duplicates?
What is insertion sort technique?
Name two algorithms two find minimum spanning tree?
What is rule regarding overriding equals and hascode method?
Differentiate between comparable and comparator.
Explain in brief a linked list.
Explain circular linked list?
What is the difference between for and foreach loop?
In what data structures are pointers applied?
Does treemap sort on key or value?
What is sort order?