Dataford
Top 50
Topic roadmap
Updated weekly · Last refresh Sep 13

Top 50 design Interview Questions

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

50questions
~7htotal time
212companies covered
Track your progressSign up free to work through all 50 questions and resume where you left off.
Start practicing free →
1
System DesignStart here. 44 questions · ~382 min
Design a Self Correcting AgentHard
Recently asked

Design the feedback loop for a self correcting AI agent that learns from user corrections, tool outcomes, and execution traces.

feedback loopdesignself-correcting agentDatadogNTT DATAClearstory
Parking Lot System DesignHard
Recently asked

Design the object-oriented classes and high-level architecture for a parking lot system.

class structuredesignarchitecture patternsSmartThingsAppleFFloQast
Why Activation Functions MatterHard

Design how to choose, train, serve, and monitor activation functions in a neural network system.

designml inferenceModel ServingJPMorganChaseAccenture
Model for Employee ReviewsHard

Design an ML system to analyze employee reviews, classify sentiment and themes, and keep outputs reliable as language and policy shift.

Feature Storefeedback loopdesignJPMorganChase
Bagging vs BoostingMedium

Design an ensemble modeling workflow that chooses bagging or boosting for JPMorganChase credit risk scoring under latency and governance constraints.

complex systemsdesignfailure modesJPMorganChase
More System Design questions with a free account
2
More topics6 questions · ~52 min
Random Number From ArrayEasy
Practice

Generate repeated uniform random picks from an Upstox market-data array while preserving duplicate-value frequency.

designupstox
Swap Two Numbers Without Extra VariableMedium
Practice

Swap two positions in a ValueMomentum data buffer in place using XOR, without a temporary variable or tuple unpacking.

javadesignoopValueMomentum
Design an End-to-End Data PipelineMedium
Recently asked

Approach for designing an end-to-end data pipeline from ingestion through transformation, storage, and downstream consumption.

data pipelinedesigningestionGloballogicII8IS - Infiniti Software SolutionsE15 Group
More questions with a free account

Sign up to see every question

Create a free account to unlock this list and practice real interview questions.

Get my prep plan
The finish line: interview-readyComplete all 50 questions to finish this plan.