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 | Uber Interview Question

Q: Move zeros to the front

This question evaluates array manipulation skills, in-place algorithm design, and reasoning about time and space complexity while preserving element order under an O(1) extra space constraint.

Given an integer array nums, move all elements equal to 0 to the beginning of the array while preserving the relative order of all non-zero elements. The transformation must be done in-place using O(1) extra space.

Example:

Input: [1, 0, 2, 0, 3]
Output: [0, 0, 1, 2, 3]

Discuss the time complexity you would target.

Move zeros to the front

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