Uber Interview LLD Questions

Uber SDE interview process, real 2025-2026 DSA/LLD/HLD interview questions, behavioral prep, interview experiences and salary details.

Low-Level Design at Uber shows up as a machine coding round as often as a pure design discussion — interviewers expect a fully executable implementation, not pseudocode, built from a deliberately underspecified prompt.

Problem 1Design a Simplified Unix-Like File System CLI

Design and implement a simplified Unix-like file system supporting mkdir, cd, ls, and pwd commands.

Requirements to clarify first

Should mkdir create intermediate directories (mkdir -p behaviour) or fail when the parent does not exist?
Must cd and mkdir accept both absolute paths (/a/b) and relative paths with . and .., or only single directory names?
Do we need files (with content) at all in this version, or is a directory-only tree enough for the machine-coding scope?

Directory and File are Composite children of Node; the FileSystem facade holds the root and cwd, delegates every path string to the PathResolver, and each CLI verb is a Command object that calls the facade.

More LLD prompts Uber has asked recently

The class design, entity list, design-pattern reasoning and follow-up discussion for these — plus the full worked solution above — are part of the Placement-Ready PYQ Kit.

Design core spreadsheet functionality — formula evaluation and a cell dependency graph with cycle detectionMedium

1 more LLD prompts with full class designs in the full Placement-Ready PYQ Kit

Kit coming soon

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