Batch vs Online Inference: Choosing How to Serve a Model
When to score models in a nightly batch job and when behind a low-latency API, with tail-latency budgets, fallbacks and the hybrid pattern.
~8 min readread →
Developer interview notes & guides — Page 3
Focused explanations and longer guides, with worked scenarios, common mistakes and interview exercises across every chapter.
level:
Showing 49–72 of 825 articles
CI/CD for Machine Learning: Pipelines and Continuous Training
How CI, CD and continuous training fit together for ML, which tests gate a pipeline, retraining triggers, and Google's MLOps maturity levels.
~8 min readread →
Data Drift vs Concept Drift: Detecting Drift with PSI and KS
How data drift, concept drift and prediction drift differ, how PSI and the KS test measure them, and why p-value alerts drown your team in noise.
~8 min readread →
LLMOps: Prompt Versioning and Evaluation Gates in CI
Treat prompts as versioned releases: register and alias them in MLflow, trace every call, and block regressions with an evaluation gate in CI.
~7 min readread →
MLflow Experiment Tracking and Model Registry Explained
Log params, metrics and models with MLflow 3, compare runs with search_runs, and promote or roll back models by moving registry aliases.
~7 min readread →
Reproducible ML: Versioning Data, Code and Models
What it takes to rebuild a model months later: code commit, data snapshot and hash, config, seeds, environment and the registered artifact.
~7 min readread →
Shadow, Canary and A/B Deployments for ML Models
How shadow mode, canary releases and A/B tests de-risk a new model, what each can measure, sticky user bucketing, and rolling back safely.
~8 min readread →
Training-Serving Skew and Feature Stores Explained
Why models that ace offline tests fail live: duplicated feature code, refitted scalers, future-leaking joins, and how feature stores stop them.
~8 min readread →
Next.js App Router vs Pages Router: Interview Guide
How the App Router differs from the Pages Router in Next.js 15, how data fetching maps across, and how to migrate one route at a time.
~8 min readread →
Next.js Caching and Revalidation: The Four Layers Explained
Request memoization, the Data Cache, the Full Route Cache and the Router Cache in Next.js 15, and how to debug a page that shows stale data.
~8 min readread →
Fixing Next.js Hydration Errors: Causes and Solutions
Why React reports that server HTML did not match the client in Next.js 15, how to find the cause, and fixes for dates, browser APIs and nesting.
~8 min readread →
Next.js Middleware: Auth Redirects, Matchers and Limits
What Next.js 15 middleware can do, how matchers decide where it runs, and why real authorisation still belongs next to your data.
~7 min readread →
Next.js Server Actions: Forms, Mutations and Security
How Server Actions turn a function into a POST endpoint in Next.js 15, how to build forms with useActionState, and how to secure every action.
~7 min readread →
Next.js Server vs Client Components: When to Use Each
How Server and Client Components render in the Next.js 15 App Router, where to put use client, and how to keep secrets out of the bundle.
~7 min readread →
Next.js SSR vs SSG vs ISR: Rendering Strategies Explained
When Next.js 15 renders a page at build time, per request or with background regeneration, and how to prove which one a route uses.
~7 min readread →
Next.js Streaming with loading.tsx, Suspense and error.tsx
How loading.tsx and Suspense stream a Next.js 15 page, where error.tsx catches failures, and why a slow layout or late notFound breaks the plan.
~8 min readread →
Redis Caching Patterns, Invalidation and Cache Stampedes
Cache-aside, write-through and write-behind with Redis, a safe invalidation order, and working code that stops a cache stampede.
~9 min readread →
Redis Data Structures and When to Use Each One
Strings, hashes, lists, sets, sorted sets, streams, HyperLogLog and bitmaps: what each Redis type costs and which interview use case it fits.
~8 min readread →
Redis Distributed Locks: SET NX PX, Fencing and Redlock
Build a correct Redis lock with SET NX PX and a token-checked release, add fencing tokens, and explain the Redlock algorithm and its critique.
~8 min readread →
Redis Eviction Policies and Key Expiry: LRU, LFU and TTL
How Redis expires keys lazily and actively, what each maxmemory-policy evicts, and how approximated LRU and LFU choose a victim.
~8 min readread →
Redis Persistence: RDB vs AOF and fsync Trade-offs
How RDB snapshots and the append-only file work, how much data each appendfsync setting can lose, and how to enable AOF without losing data.
~8 min readread →
Redis Rate Limiting with Lua: Fixed Window to Token Bucket
Fixed window, sliding log and token bucket rate limiters in Redis, why they must be atomic, and tested Lua scripts for each one.
~8 min readread →
Redis Replication, Sentinel and Cluster Hash Slots
How Redis replicates asynchronously, how Sentinel fails over, and how Cluster shards keys into 16,384 hash slots with MOVED and ASK redirects.
~8 min readread →
Why Is Redis Single-Threaded? Event Loop and I/O Threads
Why one Redis thread handles huge request rates, what io-threads and background threads change, and which commands block every client.
~8 min readread →
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