Rushed recently Coinbase Senior SDE position, the whole process feels like it tests both basics and business-the two rounds of Coding focus on scenario-based coding capabilities, the System Design focuses on actual business dismantling, and the Behavior is a regular soft power test. Today, I have sorted out the specific interview experience as a reference for students who want to join the big companies in the Crypto field~
Coding Round 1: Template randomly generates Object
Question description
Give onetemplate(for example{'traitA':['AA','AB','AC'], 'traitB':['BA','BB','BC']}), requiring the generation of a specified number of objects. Each trait value of each object is randomly selected from the corresponding list (such as generating{'traitA': 'AB', 'traitB': 'BA'}).
Follow Up 1
The generated object cannot have repeated combinations (such asTraitA=AB+traitB=BACan only appear once).
Follow Up 2
Add one to each trait valueRarityAttributes (such as{'traitA': [('AA', 1), ('AB', 3), ('AC', 5)]}),RarityThe higher it is, the lower the probability of being selected.
Coding Round 2: Traversing multiple lists by columns
Question description
The input isList of lists of ints(for example[[1,2,3], [4,5], [6]]), output the results of "column-major" traversal:[1,4,6,2,5,3](That is, take the 1st element of each sublist first, then the 2nd, and so on).
Follow Up 1
Implement two Iterator classes, both containingHasNext()AndGetNext()Method:
- The first Iterator: the input is an ordinary int list, and the elements are output in sequence;
- Second Iterator: input
StartInt, endInt, step, enumerate numbers within the range by step size (such asStart=2, end=7, step=2, output2,4,6).
Follow Up 2
Change the input toList of iterators(Use the Iterator class above) to implement the logic of "traversal by column".
System Design: Coinbase Crypto Price module backend
Ask to design the Coinbase Explore page (Https://www.coinbase.com/explore)'s Crypto Price section backend.
The direction given by the interviewer is designed in two parts:
- Online section: Provide external API services + data retrieval layer;
- Offline part: Market price pulling service + database update service.
The overall idea is relatively conventional, focusing on the frequency of data updates, caching strategies and high availability solutions.
Behavior Round
They are all regular questions, such as: the most complex technical challenge solved in the past; how to deal with conflicts in cross-team collaboration; why you want to join Coinbase. Interviewers tend to ask you to use the STAR method to describe specific scenarios with clear logic, quantitative results, and outstanding ownership.
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