What is heap and its types?
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How null key is handled in hashmap?
What are the parts of root node?
Can you override methods of arraylist?
What does it mean to sort an array?
Which interfaces are implemented by abstractqueue?
What are hash tables good for?
What is the difference between array list and vector list?
State the rules to be followed during infix to prefix conversions?
How does a treemap sort?
What is ascii sort order?
Parenthesis is never required in postfix or prefix expressions, why?
Define degree of the node?