ByteDance backend engineer interviews typically focus on APIs, databases, system design, concurrency, caching, and data structures.
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No verified questions yet for ByteDance.
system design
Senior
messaging
#1
1. [OA] Job Scheduler — Design a Job Scheduler for ByteDance’s task management system
As part of ByteDance's operations, we need to design a job scheduling system that can queue and execute tasks efficiently. Implement a class that handles job scheduling with the ability to execute tasks at specified intervals.
Problem Statement: Design a class
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- Example 1:
Input:
Constraints:
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Problem Statement: Design a class
JobScheduler with the following methods:-
JobScheduler() — Initializes a job scheduler.-
void scheduleJob(string jobId, int interval, function jobFn) — Schedules a job to run every interval milliseconds.-
void cancelJob(string jobId) — Cancels the job with the given jobId.- Example 1:
Input:
JobScheduler(), scheduleJob("job1", 3000, jobFn), cancelJob("job1")Constraints:
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1 <= interval <= 10000
system design
Senior
api design
#2
2. [OA] Rate Limiter — Design a Rate Limiter for ByteDance's API
ByteDance's APIs need a mechanism to limit the rate of requests to maintain service quality. Implement a rate limiter that controls the number of requests each user can make per minute.
Problem Statement: Design a class
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- Example 1:
Input:
Constraints:
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Problem Statement: Design a class
RateLimiter with the following methods:-
RateLimiter(int limitPerMinute): Constructor to set the limit on requests per user.-
bool isAllowed(string userId): Determine if a request from userId is allowed for the current minute.-
void recordRequest(string userId): Record that a request was made by userId.- Example 1:
Input:
RateLimiter(5), isAllowed("user1") => true, recordRequest("user1"), isAllowed("user1") => true, recordRequest("user1") => true (repeats until limit reached)Constraints:
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1 <= limitPerMinute <= 100Related ByteDance Backend Engineer interview prep
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