Can arraylist hold different types?
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What is modcount in hashmap?
Can we store null in arraylist?
What is a graph?
Differentiate between list and map.
What is queue in data structure?
Is file a data structure?
Minimum number of queues needed to implement the priority queue?
What is complexity of bubble sort?
What is a matrix?
What is an acyclic graph?
Define b-tree of order m?
Can hashtable have duplicate values?