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Top 50 concurrency Interview Questions

The most frequently asked concurrency questions across all roles and companies, ranked by real interview frequency. Updated daily.

50questions
~10htotal time
136companies covered
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1
CodingStart here. 29 questions · ~339 min
Deadlock ImplementationMedium
Practice

Detect deadlocked processes in an HPE Ezmeral resource allocation snapshot using iterative graph-free resource simulation.

deadlockconcurrencyHewlett Packard Enterprise
Leaky Rate LimiterMedium
Practice

Simulate a leaky bucket for Box API requests and return which requests are rejected.

rate limitingconcurrencyBox
Maximum Concurrent ProcessesMedium
Practice
Recently asked

Use a sweep-line algorithm to find the maximum number of overlapping IBM Cloud process intervals.

SchedulingconcurrencyIBM
Scheduled Transfer Manager ClassMedium
Practice
Recently asked

Implement an OOP transfer scheduler with cancellation, deduplication, and due execution handling using efficient data structures.

abstractionoopconcurrencyRamp
Code a Rate LimiterHard
Practice
Recently asked

Implement a per-key sliding-window rate limiter using queues for efficient request expiration.

apiData StructuresAlgorithmsAtlassian
Ordered Even/Odd With GoroutinesMedium
Practice
Recently asked

Classify slice values concurrently into even and odd sequences while preserving order within each sequence.

even numbersgoArraysGloballogic
Implement Even and Odd with GoroutinesHard
Practice

Coordinate odd and even workers to emit numbers in order using synchronization primitives.

Codingasync processingasynchronousCalsoft
Promise Queue With Concurrency LimitHard
Practice

Run asynchronous jobs with a concurrency limit while preserving input order and propagating failures.

javascriptArraysasync processingThe Farmer's Dog
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2
Behavioral & Leadership7 questions · ~82 min
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3
System Design5 questions · ~59 min
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4
Security & Infrastructure6 questions · ~70 min
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5
More topics3 questions · ~35 min
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