- Experience building or operating software systems
- Working knowledge of APIs, databases, caching, queues, networking, and basic scalability concepts
Career Skills · Software Professionals
System Design Interview
A structured path for designing scalable systems and explaining tradeoffs clearly in technical interviews.
Course roadmap
Know where you are going before you begin
A useful course should make the starting point, destination, and learning method clear—not make you guess from a list of links.
Learning material
Inside this course
Move through the material in order unless a prerequisite or practice link gives you a better reason to branch.
1. GuideA Repeatable System Design Framework
20 min A step-by-step structure for approaching design interviews.
2. InterviewDesign a URL Shortener
28 min Walk through requirements, data model, APIs, scaling, and failure modes.
3. NotesCore System Design Concepts
14 min Fast reference for caching, queues, partitioning, consistency, and observability.
Learning connections
Continue with purpose
These are curated relationships from the SubjectVision learning graph. Each recommendation should answer why it is useful next rather than merely adding another link.
Knowledge check
Test what you can apply
Five course-specific questions covering the most important ideas in System Design Interview. Commit to an answer before reading the explanation.
Score0 / 50 answered
01
What should you clarify before proposing a system design?
Good designs start by turning ambiguity into explicit functional and non-functional requirements.
Review this topic →02
Why estimate traffic and storage early?
Scale estimates help determine whether simple components are enough or whether partitioning, caching, queues, and other techniques are justified.
Review this topic →03
Why is caching a tradeoff rather than a free improvement?
Caching can reduce latency and load, but stale data and invalidation become new design concerns.
Review this topic →04
For a URL shortener, what is a core read-path requirement?
The main redirect path must efficiently resolve the short code to the destination URL.
Review this topic →05
What makes a strong system-design answer?
Interviewers care about reasoning, assumptions, tradeoffs, and how the design evolves with scale and failure requirements.
Review this topic →Complete
Review any missed answers, then continue while the concepts are fresh enough to connect.