System Design Interview Questions

Review this list of 501 System Design interview questions and answers verified by hiring managers and candidates.

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You are PM for Instagram. How would you decide on investing in a verification badge?
5 years ago2 answers
Design Instagram's Explore page.
3 years ago
What risks might arise from deploying AI systems, and how can they be addressed?
2 years ago
In Zomato district's app, we want to enable the feature for user special request while making a reservation at restaurant. How will you go around building this?
7 months ago
Design a load balancer.
2 years ago1 answer
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What does MTBF mean and why is it necessary?
5 years ago4 answers
Design a system like YouTube.
9 months ago3 answers
Design a storage system for large block data, where keys can be up to about 1K and values can be up to about 300K.
6 months ago1 answer
Design a taxi recommendation system for airports.
a year ago1 answer
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
Explain how microservices work.
3 years ago3 answers
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
How would you design security for something like Stripe?
5 months ago
Design Reddit. Has video answer
2 years ago2 answers
Design a recommender system feature for Dropbox that suggests files to users when they open the app on their phone.
7 months ago
Design an API for searching a folder. Has video answer
4 years ago4 answers
Detect the language of a text input.
3 years ago
Design a system to keep whatever is written to one system consistent with the second system.
a year ago
Design Facebook to be more secure, private, and intimate.
5 years ago1 answer
How would you design Perplexity's system?
8 months ago

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System Design Interview Questions

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

Design Instagram's Explore page.

What risks might arise from deploying AI systems, and how can they be addressed?

In Zomato district's app, we want to enable the feature for user special request while making a reservation at restaurant. How will you go around building this?

Design a load balancer.

What does MTBF mean and why is it necessary?

Design a system like YouTube.

Design a storage system for large block data, where keys can be up to about 1K and values can be up to about 300K.

Design a taxi recommendation system for airports.

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?

Explain how microservices work.

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

How would you design security for something like Stripe?

Design Reddit. Has video answer

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

Design an API for searching a folder. Has video answer

Detect the language of a text input.

Design a system to keep whatever is written to one system consistent with the second system.

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

How would you design Perplexity's system?

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