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Solnce55 [7]
3 years ago
14

Let s be a stack. Consider the following program:

Computers and Technology
1 answer:
yawa3891 [41]3 years ago
7 0

Answer:

Hi

In the first scenario we have

S = []

then:

S=[1],

S=[2,1]

S=[3,2,1]

S=[2,1]

S=[4,2,1]

S=[2,1]

S=[1]

So when it's call the method peek to S, X will be assigned 1

Explanation:

Stack is a linear data structure which follows a particular order in which the operations are performed. The order may be LIFO(Last In First Out). There are many real-life examples of a stack. Consider an example of plates stacked over one another in the canteen. (Taken from wikipedia)

- The method <em>push</em> is to put the element on the top of the stack

- The method <em>pop</em> is take out the top element of the stack

- The method <em>peek</em> is to see what is the top element of the stack

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