How do I approach Coding & Algorithms interview questions?

Coding & Algorithms questions require understanding of core concepts and practice. PracHub provides solutions with explanations to help you master coding & algorithms interviews.

What difficulty level is this interview question?

This is a easy difficulty Coding & Algorithms question, commonly asked during Take-home Project rounds at Meta.

What role is this question designed for?

This question is commonly asked for Machine Learning Engineer candidates at Meta during technical interviews.

Solve four OA string/array/matrix/graph tasks

Last updated: May 6, 2026

Quick Overview

This multi-part prompt evaluates proficiency in core programming competencies: string parsing and character classification, simulation/greedy processing of linear movement and arrays, matrix manipulation including row/column operations and rotations, and undirected graph path reconstruction.

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Solve four OA string/array/matrix/graph tasks