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 medium difficulty Coding & Algorithms question, commonly asked during Onsite rounds at Meta.

What role is this question designed for?

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

Solve three array/string/graph coding tasks

Last updated: Jun 27, 2026

Quick Overview

This set of three coding tasks evaluates proficiency in fundamental data structures and algorithms, covering multi-way array merging, custom character ordering and grouping, and graph cloning with correct handling of cycles and references.

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Solve three array/string/graph coding tasks