text,label
How do I print hello world in Python?,simple
explain tcp handshake simply,simple
How do I reverse a string in JS?,simple
whats git stash do,simple
Difference between == and === in JavaScript,simple
How to check python version in terminal,simple
What is a null pointer?,simple
Convert celsius to fahrenheit formula,simple
What does HTTP 404 mean?,simple
What is the use of a .gitignore file?,simple
How to exit vim lol,simple
What is a REST API?,simple
what does async mean in programming,simple
How to declare a variable in Go?,simple
What's the difference between RAM and ROM?,simple
How to install a package with pip,simple
What does CRUD stand for,simple
What is a boolean?,simple
How to copy a file in Linux,simple
What does the break statement do,simple
Explain how a for loop works with an example,simple
What are environment variables and how do I use them,simple
How does version control help in team projects,simple
Explain recursion with a simple example,simple
What is the difference between a process and a thread?,simple
How does HTTPS differ from HTTP,simple
Explain what a hash function does,simple
What is the MVC pattern? simple explanation please,simple
How does caching improve performance,simple
What is a CDN and when would I use one,simple
Explain promises in JavaScript to a beginner,simple
how does binary search work,simple
Write a Python function to check if a number is prime,simple
Show me how to do basic list comprehension in Python,simple
Write a simple REST endpoint in Flask,simple
How to read a CSV file in Python with pandas,simple
Create a simple to-do list app in React,simple
How to connect to a SQLite database in Python,simple
How to center a div in CSS,simple
Make a simple HTTP GET request in Python,simple
Write regex to validate an email address,simple
How to merge two dictionaries in Python 3,simple
Show a basic Docker build and run flow,simple
How do I sort a list of objects by a field in Python,simple
Write a basic unit test in Jest,simple
How to use environment variables in a Node app,simple
"My recursive DFS crashes after several calls, help debug",medium
"I'm getting a CORS error in my React app, how to fix",medium
How do I handle race conditions in concurrent Python code,medium
What's the best way to paginate a large dataset in SQL,medium
"My API response times are slow, where should I start debugging",medium
Explain the CAP theorem with practical examples,medium
How to implement JWT authentication in Express,medium
Whats the diff between optimistic and pessimistic locking,medium
How to do zero-downtime deployments for a web service,medium
Best practices for error handling in async Node.js code,medium
How to profile a slow Python script,medium
Explain database normalization up to 3NF with examples,medium
How do I avoid memory leaks in a long-running Node process,medium
walk me through setting up CI/CD for a small team,medium
How does connection pooling work and when should I use it,medium
What are the tradeoffs between monorepo and polyrepo setups,medium
Explain event-driven architecture to someone new to it,medium
What's the difference between horizontal and vertical scaling,medium
How to implement a basic pub-sub system from scratch,medium
How to do blue-green deployments without breaking users,medium
whats the time complexity of quicksort,medium
Explain the difference between BFS and DFS,medium
How does a load balancer decide which server to route to,medium
Explain backpressure in streaming pipelines,medium
What is write-ahead logging in databases,medium
How does MVCC work in Postgres,medium
Explain the fan-out problem in social feeds,medium
What are the tradeoffs of a microservices vs monolith,medium
How does consensus work in distributed systems briefly,medium
What is tail latency and why does it matter,medium
How does a LRU cache work internally,medium
Help me pick between SQL and graph DB for a social network app,medium
Review this database schema and tell me what's wrong with it,medium
Should I use a queue or a database for this job processing use case,medium
Walk me through best practices for secrets management,medium
What's the right way to handle distributed tracing in my services,medium
Design a distributed recommendation system with failure recovery strategies,complex
How would you architect a multi-tenant SaaS platform with strict data isolation,complex
Design a system to handle 100k concurrent WebSocket connections reliably,complex
Create a comprehensive ML pipeline for training and serving large language models in production,complex
How would you build a search engine from scratch that handles typos and semantic similarity,complex
Design an event sourcing system with CQRS that handles audit logs and replay,complex
Architect a payment processing system with idempotency and exactly-once semantics,complex
Design a distributed job scheduling system that handles priorities and retries at scale,complex
Build a feature store architecture for real-time and batch ML feature serving,complex
How do I build a horizontally scalable notification system for billions of users,complex
Design a content delivery system that handles surges from viral content,complex
Create a multi-region database replication strategy with minimal lag and failover,complex
What are the main challenges with distributed transactions and how do teams solve them,complex
Explain the design decisions behind a modern column-store database,complex
How do large-scale recommendation systems handle cold start problems,complex
What are the engineering tradeoffs of building your own service mesh vs using an existing one,complex
How do you design an ML system that can detect data drift in production,complex
Describe the architecture of a high-availability storage system with erasure coding,complex
What makes building multi-tenant ML inference systems hard and how do teams do it,complex
How do you build a rate limiter that works correctly across multiple nodes,complex
What are the tradeoffs in designing a log-structured merge-tree storage engine,complex
How does a modern stream processing system handle late-arriving data correctly,complex
Design a cache eviction strategy for a system with wildly varying access patterns,complex
Help me plan a migration from a monolith to services without downtime,complex
Review my ML model serving architecture and find the bottlenecks,complex
Help me design observability for a system with 50 interdependent services,complex
My system has unpredictable latency spikes under load. help me figure out why,complex
Build a live chat feature that shows typing indicators in real time,medium
How do I push live price updates to thousands of users simultaneously,complex
How to build a live dashboard that refreshes every second without overloading the server,medium
Implement a collaborative whiteboard where multiple users draw at the same time,complex
How do I stream AI responses token by token to the frontend,medium
What's the best way to handle live GPS tracking for a delivery app,medium
How to implement live autocomplete suggestions as user types,simple
design a pub-sub system for live sports score updates,medium
How do I schedule a daily ML model retraining job,medium
I need to backfill 2 years of historical data into a new table,medium
How to generate PDF reports for 100k users in the background,medium
Build an ETL pipeline that runs nightly to sync two databases,medium
How to batch-send email newsletters to a million subscribers efficiently,medium
"My model's accuracy is dropping in production, where do I start",medium
How do I version datasets for reproducible ML training,medium
Explain the difference between online and batch feature engineering,medium
How do I set up A/B testing for two versions of an ML model,medium
What's the best way to serve a PyTorch model with low latency,medium
How to detect when my training data starts to look different from prod data,complex
What should my ML model CI/CD pipeline include,medium
How do I handle class imbalance in a production fraud model,medium
Build a simple model registry from scratch,medium
How to roll back a bad model deployment safely,medium
Summarize recent approaches to reducing LLM hallucinations,complex
What are the current state-of-the-art methods for time series forecasting,complex
Compare different approaches to vector similarity search at scale,medium
What are the known failure modes of transformer-based models,medium
What does the research say about the effectiveness of chain-of-thought prompting,medium
Summarize the tradeoffs of different approximate nearest neighbor algorithms,medium
What's the current thinking on retrieval-augmented generation vs fine-tuning,complex
What are the main approaches to neural architecture search,complex
what language should I learn first as a beginner,simple
i dont understand what a variable is can you explain,simple
"what is a function in programming, explain like im 10",simple
confused about what an IDE is,simple
how does the internet actually work at a high level,simple
can you explain what a server is in simple terms,simple
difference between frontend and backend for a beginner,simple
what does it mean when code throws an exception,simple
what is an algorithm in plain english,simple
"i keep seeing JSON everywhere, what is it",simple
my app keeps crashing randomly and I have no idea why,medium
things are working locally but broken in prod,medium
"users are complaining the app is slow, what do I check",medium
"I want my system to handle more traffic, where do I start",medium
something in my pipeline is failing silently and I cant find it,medium
I think theres a memory leak but im not sure how to confirm,medium
"my build times are getting really long, any ideas",medium
"we're seeing weird behavior only on Tuesdays, what could cause that",complex
my service works fine for 1000 users but breaks at 10k,complex
i need to make this faster but dont know where the bottleneck is,medium
the tests pass locally but fail in CI,medium
"I need to start from scratch on the backend, any advice",medium
"I'm overwhelmed by all the infra options, how do I choose",medium
k8s vs docker compose for small team,medium
async vs sync quick explanation,simple
best db for high write throughput?,medium
tf is a sidecar container,simple
diff btwn put and patch in REST,simple
pg vs mysql for 2025 project,simple
how 2 make docker container smaller,simple
whats service mesh tho,medium
lambda vs ec2 for event processing,medium
sql joins quick ref plz,simple
should i use nosql or sql???,medium
how often shud i commit to git lol,simple
How do I set up a load balancer for a Node app on a single cloud provider,medium
What's a good container resource request/limit strategy for variable workloads,medium
How do I set up auto-scaling that doesn't overreact to short spikes,medium
Walk me through setting up a basic VPC with public and private subnets,medium
How to manage infrastructure changes safely across multiple environments,medium
How do I reduce cold start time for serverless functions,medium
What's involved in running a multi-region active-active setup,complex
Set up a service that auto-scales based on queue depth,complex
This async function returns before the data is ready sometimes,medium
"My database writes are way slower than reads, what's going on",medium
My service mesh is dropping about 2% of requests silently,complex
I have a Heisenbug that disappears when I add logging,complex
Memory usage grows by 10MB every hour in my Java service,complex
This race condition only happens in prod under high load,complex
How do I implement debounce in vanilla JavaScript,simple
Write a generic binary search tree in TypeScript,medium
Write a parser for a simple expression language,complex
Implement consistent hashing in Go,complex
Show me how to write a custom React hook for pagination,medium
Write a middleware that logs every request and response,simple
Implement a simple in-memory LRU cache in Python,medium
How to write a CLI tool in Go with flags and subcommands,medium
Write a function that retries an async operation with jitter,medium
Show me how to do pagination with cursor-based approach in GraphQL,medium
Write a simple distributed lock using Redis primitives,complex
What factors should I weigh when choosing a message broker,medium
"How do teams manage config across dev, staging, and prod",medium
What are the tradeoffs of server-side vs client-side rendering,medium
What's the difference between circuit breaker and retry patterns,medium
How to model hierarchical data in a relational database,medium
When should I use a graph database instead of a relational one,medium
How do I implement full-text search without an external service,medium
How do I measure the latency of each service call in my stack,medium
How do I reduce API response time from 800ms to under 200ms,complex
How to safely run database migrations with millions of rows in prod,complex
What are the hardest parts of building a reliable job queue,complex
How to implement soft deletes and why it gets complicated,medium
How do I build multi-language support into my app from the start,medium
What are common GDPR compliance considerations for a SaaS app,medium
How to structure feature permissions for a role-based system,medium
How do teams handle long-running transactions safely,complex
Explain the saga pattern for distributed business transactions,complex
How do I profile and reduce cold starts in a containerized environment,complex
What's the deal with linear vs append-only data structures,medium
What's the tradeoff between normalization and query performance,medium
How to design an API that can evolve without breaking clients,medium
Build a data pipeline that handles schema changes gracefully,complex
How do large teams coordinate on a shared database schema,complex
What are signs that a monolith is ready to be broken up,medium
What are the practical gotchas of running containers in production,medium
How do you calculate the right timeout values for service calls,medium
What's a sensible default observability stack for a new service,medium
How do I model financial transactions to avoid double-spend issues,complex
What does a healthy on-call rotation look like for a small team,simple
How do embedding models differ from generative models,medium
What are practical ways to reduce inference cost for an LLM app,complex
How do you do canary deployments for ML models specifically,complex
What is quantization and does it hurt model quality much,medium
what is a transformer architecture in one paragraph,simple
How do I pick the right embedding dimension for my use case,medium
How do I check if a key exists in a Python dict,simple
What does the yield keyword do in Python,simple
How to check disk usage on Linux,simple
What is a constructor in OOP,simple
How do I pass command line args to a Python script,simple
What does idempotent mean in APIs,simple
How to make a GET request with curl,simple
How to format a date in Python,simple
How to flatten a nested list in Python,simple
What is port forwarding,simple
What is SSH and how does it work simply,simple
What does it mean to serialize data,simple
How to convert JSON to a Python dict,simple
What is the purpose of a package.json file,simple
How to run a shell command from Python,simple
What is method overloading,simple
How to read a file line by line in Python,simple
What is an abstract class,simple
What is a webhook,simple
How to swap two variables without a temp in Python,simple
What is a singleton pattern,simple
How to install npm packages globally,simple
What does TTL mean in networking,simple
How to generate a random number in Python,simple
What is a closure in JavaScript,simple
How do distributed systems handle network partitions,medium
What's the right way to handle long-running HTTP requests,medium
How do I mock database calls in Python unit tests,medium
Explain vector clocks and why they matter,medium
How does connection draining work in a load balancer,medium
How to do graceful shutdown of a web server,medium
When should you use a message queue vs direct API calls,medium
How do you implement search autocomplete efficiently,medium
How to detect and prevent SQL injection,medium
Explain the difference between eager and lazy loading,medium
How to handle long-polling vs webhooks vs SSE,medium
What strategies exist for handling API versioning,medium
What is change data capture and when would I use it,medium
How do I handle timezone-aware datetimes in Python correctly,medium
How to batch database writes without losing data,medium
How do I prevent data loss during a service restart,medium
What is the strangler fig pattern and when to use it,medium
How do I do canary releases for a REST API,medium
How to write idempotent database migrations,medium
How do I implement a distributed counter accurately,medium
Best practices for structuring a large SQL query,medium
How to handle long transactions that might timeout,medium
How would you design a globally consistent metadata store,complex
Explain the internals of a modern query optimizer,complex
Design a distributed rate limiter that works across data centers,complex
Architect a system that guarantees exactly-once delivery at scale,complex
How do you build a time-series database optimized for high cardinality,complex
Design the data model for a multi-tenant permission system at scale,complex
How do large-scale ML inference systems handle model versioning safely,complex
What are the challenges and solutions for live migrating stateful containers,complex
How do you design a distributed queue that handles backpressure gracefully,complex
How to build a cross-region active-active database with conflict resolution,complex
What's involved in building a low-latency high-throughput matching engine,complex
How do you prevent thundering herd in a distributed caching layer,complex
Explain how columnar compression works and affects query performance,complex
How would you build a fully auditable event log with tamper detection,complex
Design an adaptive routing system that handles heterogeneous backend capacity,complex
How to safely migrate a live system from eventual to strong consistency,complex
What are the deep performance considerations for building a JVM-based service,complex
Design a system for online learning where models update from live user feedback,complex
How do you build observability into a system that handles 1M events per second,complex
"Design a content moderation pipeline that handles text, images, and video at scale",complex
How would you build a distributed ID generation system with time ordering,complex
Design a real-time anomaly detection system for infrastructure metrics,complex
What are the tradeoffs of CRDT-based conflict resolution vs OT for collaborative apps,complex
How do you safely deprecate an internal API used by 30 downstream services,complex
How do you design a low-latency ad bidding system that handles 500k QPS,complex
Design an autoscaling inference cluster for multimodal AI models with cost controls,complex
How would you build a multi-cloud disaster recovery system with RPO under 1 minute,complex
Architect a real-time personalization engine for an e-commerce platform at scale,complex
How to architect a platform for running untrusted user code securely at scale,complex
Design a self-healing infrastructure system that detects and remediates issues autonomously,complex
How to build a horizontally scalable session management system with sub-millisecond lookup,complex
Design a large-scale data anonymization pipeline that preserves analytical utility,complex
Design a system to detect and mitigate DDoS attacks in real time without blocking legitimate users,complex
What is a namespace in programming,simple
How to create an empty array in JavaScript,simple
What is a heap in data structures,simple
What is a semaphore,simple
Whats the difference between i++ and ++i,simple
How to get current timestamp in Unix seconds in Python,simple
What is a race condition in one line,simple
How to check type of variable in Python,simple
What is the difference between deep copy and shallow copy,simple
Help me pick between a managed queue and a self-hosted broker for my use case,medium
What caching strategy makes sense for my read-heavy product catalog,medium
Review my API rate limiting approach and identify weaknesses,medium
How should I structure config management across 20 services,medium
Help me plan a database migration with minimal developer disruption,medium
What observability gaps do teams typically miss in their first production service,medium
How does Raft consensus algorithm actually work step by step,complex
Explain the internals of how a distributed hash table routes requests,complex
What are the deep tradeoffs in choosing between push vs pull architectures,complex
What are the failure modes of leader election in a distributed system,complex
Explain fencing tokens and why they matter for distributed locking,complex
How do modern databases maintain ACID guarantees without sacrificing throughput,complex
How does the Linux kernel handle context switching,medium
Explain how JIT compilation works at a high level,medium
What is copy-on-write and how is it used in OS design,medium
Explain how virtual memory paging works,medium
How do file system journaling and checksums protect against corruption,medium
What is a content negotiation in HTTP,simple
How to convert a dict to a sorted list of tuples in Python,simple
How do I set a timeout on a network call in Python,simple
What is the difference between INNER JOIN and LEFT JOIN,simple
What is the difference between TCP and UDP,simple
What is the Observer design pattern,simple
"Architect an end-to-end data lake with governance, lineage, and query federation",complex
Build a cross-cloud identity federation system with SSO and fine-grained permissions,complex
Architect a horizontal scaling strategy for a stateful multiplayer game backend,complex