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GATE | GATE-CS-2004 | Question 3
  • Last Updated : 15 Sep, 2014

A single array A[1..MAXSIZE] is used to implement two stacks. The two stacks grow from opposite ends of the array. Variables top1 and top2 (topl< top 2) point to the location of the topmost element in each of the stacks. If the space is to be used efficiently, the condition for “stack full” is
(A) (top1 = MAXSIZE/2) and (top2 = MAXSIZE/2+1)
(B) top1 + top2 = MAXSIZE
(C) (top1= MAXSIZE/2) or (top2 = MAXSIZE)
(D) top1= top2 -1

Answer: (D)

Explanation: See question 5 of

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