Can arraylist contain duplicates?
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Can a class have a constructor?
Can we extend an array after initialization?
Does hashmap sort automatically?
What is meant by linked list?
Give a good data structure for having n queues ( n not fixed) in a finite memory segment. You can have some data-structure separate for each queue. Try to use at least 90% of the memory space.
Which sorting is stable?
Write a Program for Insert in a sorted list
What is map data structure?
How does a selection sort work for an array?
which is the simplest file structure? (Sequential, indexed, random)
Name few concurrent collection classes?
What are the advantage of collection classes over arrays?