Implement Function to Determine Mode and Prime Numbers

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This is a Medium difficulty Coding & Algorithms question, commonly asked during Technical Screen rounds at Amazon.

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This question is commonly asked for Data Scientist candidates at Amazon during technical interviews.

Question

##### Scenario

Implementing utility algorithms within a data-processing library.

##### Question

Write a function that returns the mode of an integer list; if all values are unique return None, and support multiple modes when ties exist. Given an integer array containing 1 to n, output all prime numbers in the array.

##### Hints

Emphasize time complexity and edge-case handling.

PracHub · Accepted Answer

This question evaluates algorithmic problem-solving skills, including frequency analysis for mode computation, correct handling of ties and uniqueness edge cases, and basic number-theoretic competency for prime identification.

Quick Overview

Implement Function to Determine Mode and Prime Numbers