What are the four types of variables?
How is a hashset implemented?
Can we make hashmap synchronized?
Why is arraylist used?
Can we store a string and integer together in an array?
Tell me do array subscripts always start with zero?
What are splay trees?
What is the difference between list, set and map?
Can you sort a hashset?
Define internal nodes?
Is hashmap sorted?
Is array a linked list?
Can treeset have duplicates?