Fill in the blanks:

_________ is the term coined for insertion of elements in a Stack list.

Fill in the blanks:

Consider the following operations done on Stack:

push(5)

push(8)

pop()

push(2)

push(5)

pop()

pop()

pop()

push(1)

pop()

The output of the above snippet is _________.

Fill in the blanks:

If the elements "A", "B", "C" and "D" are placed in a queue and are deleted one at a time, the order in which they will be removed will be _________, _________, _________ and _________.

Fill in the blanks:

The process of inserting an element in a queue is called _________ while deleting an element from a queue is called _________.