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Low Level Design

Designing An In-Memory File System

Prepare to design an in-memory file system, focusing on hierarchical structures, file operations, metadata handling, and reliable object-oriented design.

Interview Details

Get ready to design an in-memory file system, a classic case study that explores how operating systems manage files and directories. This interview will test your ability to model hierarchical structures, support file operations, and consider error handling in a constrained, memory-only environment. You’ll demonstrate how to translate real-world OS concepts into clean, object-oriented designs.

What You'll Practice:

  • Gathering and refining system requirements for a file system.
  • Modeling hierarchical relationships using OOP principles.
  • Applying design patterns to manage file and directory operations.
  • Handling edge cases and enforcing constraints (e.g., unique names, invalid paths).
  • Visualizing relationships and flows with UML class diagrams.

By the end of this interview, you will sharpen your ability to design reliable, extensible, and maintainable systems that mirror real-world complexities in file management.

Get ready to design an in-memory file system, a classic case study that explores how operating systems manage files and directories. This interview will test your ability to model hierarchical structu...

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Interview Guidelines

The interviewer simulates a real-world interview an adapts accordingly.

Ask for hints or clarifications if you're stuck.

What to expect

35 Responses
Diagramming tool

Built to Simulate the MAANG Experience

Prep for Every Loop

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Practice explaining complex technical concepts verbally to build confidence and refine your communication skills.

Detailed Analysis

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Unlock insights that highlight your weaknesses and gives you sample responses.

Instant, Actionable Feedback

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Receive immediate, targeted guidance on solution correctness, complexity, and approach.

Interactive Environment

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Hone your coding logic in an editor and bring your system designs to life with an integrated diagramming workspace.

Tailored to Your Preferences

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Get relevant practice scenarios for your role and experience, whether you're a junior or an engineering manager.