Stack Operations - Section 2 | Multiple Questions and Answers

21.	In a stack, if a user tries to remove an element from empty stack it is called :

	A.	Underflow
	B.	Empty collection
	C.	Overflow
	D.	Garbage Collection

22.	Entries in a stack are "ordered". What is the meaning of this statement?

	A.	A collection of stacks is sortable
	B.	Stack entries may be compared with the '<' operation
	C.	The entries are stored in a linked list
	D.	There is a Sequential entry that is one by one

23.	What is the value of the postfix expression 6 3 2 4 + – *:

	A.	Something between -5 and -15
	B.	Something between 5 and -5
	C.	Something between 15 and 100
	D.	Something between 5 and 15

24.	If there's no base criteria in a recursive program, the program will:

	A.	not be executed.
	B.	execute infinitely.
	C.	execute until all conditions match.
	D.	obtain progressive approach.