Which of the following operations is not typically associated with a Stack ADT?

Question

BlackTom AI · Accepted Answer

To assess which operation is not typically associated with a Stack ADT, I’ll evaluate each option in the context of how stacks are defined and used.
Option a: peek. This operation is commonly supported by stacks. Peek allows you to look at the top element without removing it, which aligns with the LIFO behavior of stacks. It’s a standard auxiliary operation alongside push and pop.
Option b: pop. This is a core stack operation. Pop removes and returns the element at the top of the stack, precisely reflecting the last-in, first-out principle that defines a stack.
Option c: append. In many programming languages and data structures, append (or += / add to the end) refers to extending a sequence like a list in a general sense. However, a true Stack ADT emphasizes operations that manipulate the top of the stack (push, pop, and optional top/peek). Append does not conceptually fit the strict push/pop semantics, since it typically affects the underlying container more broadly and is not a standard stack operation.
Option d: push. This is another fundamental stack operation. Push adds a new element to the top of the stack, advancing the LIFO behavior that stacks are built on.
In summary, the stack-centric operations are push, pop, and often peek/top. The term append describes a general sequence operation not inherently aligned with the scoped top-of-stack manipulation that defines a Stack ADT.

FIT1008-FIT1054-FIT2085 Fundamentals of algorithms - S2 2025

Which of the following operations is not typically associated with a Stack ADT?

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FIT1008-FIT1054-FIT2085 Fundamentals of algorithms - S2 2025

Which of the following operations is not typically associated with a Stack ADT?

View Explanation

Log in for full answers

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