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 Technical Screen rounds at Uber.

What role is this question designed for?

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

Move zeros to the front

Last updated: Mar 29, 2026

Quick Overview

This question evaluates array manipulation and in-place algorithm competencies, including handling space-time trade-offs and preserving relative order (stability) while operating with O(1) extra space.

medium
Uber
Coding & Algorithms
Data Scientist

Uber

Jan 30, 2026, 12:00 AM

Data Scientist

Technical Screen

Coding & Algorithms

You are given an integer array nums. Reorder the array in place so that all 0 values are moved to the beginning of the array, while preserving the relative order of all non-zero elements.

Requirements:

The transformation must be done in place.
Use only O(1) extra space.
The relative order of non-zero elements must remain unchanged.

Example:

Input: [4, 0, 5, 0, 3]
Output: [0, 0, 4, 5, 3]

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