Suppose that Sl and S2 are empty stacks and al, a2 and a3 are objects. write below, what do the two stacks Sl and S2 contain after executing the following sequence of operations: Sl.push(a2), Sl.push(al), S2.push( a3) S2.push(Sl.peek()), S2.push(Sl.peek()), S2.push(Sl.pop()

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
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Suppose that Sl and S2 are empty stacks and al, a2 and a3 are objects.
write below, what do the two stacks Sl and S2 contain after executing the
following sequence of operations:
Sl.push(a2), Sl.push(al), S2.push( a3)
S2. push(Sl.peek()), S2.push(Sl.peek()),
S2.push(Sl.pop0)
Transcribed Image Text:Suppose that Sl and S2 are empty stacks and al, a2 and a3 are objects. write below, what do the two stacks Sl and S2 contain after executing the following sequence of operations: Sl.push(a2), Sl.push(al), S2.push( a3) S2. push(Sl.peek()), S2.push(Sl.peek()), S2.push(Sl.pop0)
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