Why do we need to recycle?
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Can we create a null as a key for a map collection?
How is it possible to insert different type of elements in stack?
State the different ways of representing expressions?
How null key is handled in hashmap?
What is the difference between array and stack?
Define hash table?
Mention for which header list, you will found the last node contains the null pointer?
Stack can be described as a pointer. Explain.
Can hashmap be sorted?
Mention the steps to insert data at the starting of a singly linked list?
Which are the sorted collections?
What is push and pop in stack?