A easy Python interview practice problem on DataDriven. Write and execute real python code with instant grading.

Domain

Python

Difficulty

easy

Seniority

L3

Problem

Implement a stack via an operations list. Each operation is a list: ['push', x], ['pop'], ['peek'], ['is_empty']. Return a parallel list of return values: None for push, the popped value (or None if empty) for pop, the top value (or None if empty) for peek, True/False for is_empty.

Summary

Push, pop, peek. The basics that break people.

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