Data Structures | Stack | Question 4

Consider the following pseudocode that uses a stack

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declare a stack of characters
while ( there are more characters in the word to read )
{
   read a character
   push the character on the stack
}
while ( the stack is not empty )
{
   pop a character off the stack
   write the character to the screen
}

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What is output for input “geeksquiz”?


(A) geeksquizgeeksquiz

(B) ziuqskeeg

(C) geeksquiz

(D) ziuqskeegziuqskeeg



 Answer: (B) 

Explanation: Since the stack data structure follows LIFO order.  When we pop() items from stack, they are popped in reverse order of their insertion (or push())



    

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