System Design Interview Questions

Review this list of 452 System Design interview questions and answers verified by hiring managers and candidates.

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Design an auto-complete feature.
5 months ago1 answer
How would you design Perplexity's system?
7 months ago
Design a 5:1 audio system for WhatsApp, Instagram, and Messenger, including hardware interfaces, codecs, API endpoints, and the value proposition for Meta.
a year ago
Design Instagram's Explore page.
3 years ago
You are PM for Instagram. How would you decide on investing in a verification badge?
5 years ago2 answers
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Design a load balancer.
2 years ago1 answer
What does MTBF mean and why is it necessary?
5 years ago4 answers
Design a system like YouTube.
8 months ago3 answers
Our booking platform experiences higher traffic during the day, requiring server upgrades which cause 10 to 30 minutes of downtime. How can you improve this situation?
3 years ago2 answers
Design a radar tower model for a moving ship.
9 months ago
How would you scale the design of a messaging system that only involves emojis for users in Europe and US? How would you identify the origin of traffic?
a year ago1 answer
Design a recommender system feature for Dropbox that suggests files to users when they open the app on their phone.
6 months ago
Design a system that collects logs and metrics from many source systems, processes them by dimensions like location, customer, and data type, and serves them to downstream consumers.
5 months ago
How would you design security for something like Stripe?
3 months ago
Explain how microservices work.
3 years ago3 answers
Detect the language of a text input.
2 years ago
Design Reddit. Has video answer
2 years ago2 answers
Design an API for searching a folder. Has video answer
4 years ago4 answers
Design Facebook to be more secure, private, and intimate.
5 years ago1 answer
How would you handle an API migration where customers need to do some development work?
4 years ago3 answers

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System Design Interview Questions

Design an auto-complete feature.

How would you design Perplexity's system?

Design a 5:1 audio system for WhatsApp, Instagram, and Messenger, including hardware interfaces, codecs, API endpoints, and the value proposition for Meta.

Design Instagram's Explore page.

You are PM for Instagram. How would you decide on investing in a verification badge?

Design a load balancer.

What does MTBF mean and why is it necessary?

Design a system like YouTube.

Our booking platform experiences higher traffic during the day, requiring server upgrades which cause 10 to 30 minutes of downtime. How can you improve this situation?

Design a radar tower model for a moving ship.

How would you scale the design of a messaging system that only involves emojis for users in Europe and US? How would you identify the origin of traffic?

Design a recommender system feature for Dropbox that suggests files to users when they open the app on their phone.

Design a system that collects logs and metrics from many source systems, processes them by dimensions like location, customer, and data type, and serves them to downstream consumers.

How would you design security for something like Stripe?

Explain how microservices work.

Detect the language of a text input.

Design Reddit. Has video answer

Design an API for searching a folder. Has video answer

Design Facebook to be more secure, private, and intimate.

How would you handle an API migration where customers need to do some development work?

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