A stack is implemented with an array of ‘A[0…N – 1]’ and a variable ‘pos’. The push and pop operations are defined by the following code.push (x) A[pos] ← x pos ← pos – 1end pushpop ( ) pos ← pos + 1 return A[pos]end pop Which of the following will initialize an empty stack with capacity N for the above implementation ?(A) pos ← –1(B) pos ← 0(C) pos ← 1(D) pos ← N – 1

A stack is implemented with an array of ‘A[0…N – 1]’ and a var

1.	A stack is implemented with an array of ‘A[0…N – 1]’ and a variable ‘pos’. The push and pop operations are defined by the following code.push (x) A[pos] ← x pos ← pos – 1end pushpop ( ) pos ← pos + 1 return A[pos]end pop Which of the following will initialize an empty stack with capacity N for the above implementation ?(A) pos ← –1(B) pos ← 0(C) pos ← 1(D) pos ← N – 1
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