Is arraylist reference type?
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Evaluate the following prefix expression " ++ 26 + - 1324" (Similar types can be asked)
Define depth and height of a tree?
What is bubble sort and quick sort?
What is data and information explain with example?
What's the difference between a hashtable and a hashmap?
What is queue in data structure?
What is the difference between list, set and map?
Which searching algorithm is best?
Is hashset thread safe?
Can arraylist hold duplicates?
Which sorting is best and why?
Does treemap allow null keys?