Intermediate~3h
CDN & Networking in System DesignInterview Readiness Check
CDN architecture, DNS, HTTP/2, QUIC, TLS, anycast, cache strategies.
cdndnshttp2quictlsanycastcache-bustingnetworking
Learning path
Try a sample question
A user in Mumbai requests an image from a CDN. The CDN has edge nodes in Mumbai, Singapore, and London. The image is not cached anywhere. Which sequence of events happens?
A.The Mumbai edge node receives the request (cache miss), fetches from origin, caches the response locally, then serves it — subsequent Mumbai requests hit the cache
B.The Mumbai edge node serves a cached empty response while fetching from origin in background
C.The request goes directly to the origin server, bypassing the CDN
D.All three edge nodes simultaneously fetch from origin to warm up global cache
Sign up free to take the full check and see the answer with an explanation.
What this module tests
- Conceptual understanding of cdn & networking fundamentals
- Trade-offs and design decisions in real system scenarios
- cdn and dns — applied knowledge
- Interview-style reasoning and explanation quality
Free to start
Take the CDN & Networking check →
10 questions · Dimension scoring · AI coach feedback · Shareable result
Test your knowledge — free →No credit card · Takes 10–15 min
Frequently asked questions
- What does the CDN & Networking check test?
- The check covers cdn architecture, dns, http/2, quic, tls, anycast, cache strategies. Questions span beginner to advanced difficulty and test both conceptual understanding and practical trade-off reasoning.
- What keywords should I know for CDN & Networking?
- Key concepts include: cdn, dns, http2, quic, tls, anycast, cache-busting, networking. These frequently appear in system design interviews at product and infrastructure companies.
- How many questions are in the check?
- Each check has 10 questions — a mix of MCQ and short-answer. You get scored by dimension (e.g., scalability, consistency) so you know exactly where to focus.
- How long does it take to study CDN & Networking?
- Most engineers spend around 3 hours on this module. The check itself takes about 10–15 minutes. You can retake it up to 3 times per day.
- What prerequisite knowledge do I need before CDN & Networking?
- CDN & Networking builds on Fundamentals and Caching. Complete those first for the best results.
- Is cdn, dns, http2 covered?
- Yes. The CDN & Networking module covers cdn, dns, http2 among other key concepts. The check includes questions that reflect real system design interview patterns.