Interview Revision Platform

Revise any tech topic
in under 1 hour.

High-signal content for mid to senior engineers. Structured for fast recall, not passive reading.

How it works

01Compress

Pick a topic at a memory budget — Python in 2 KB. See only the anchors you must remember.

02Recall

Flashcards test the anchors. Spaced repetition picks the next card.

03Compare

Postgres vs Mongo, threading vs async. Side-by-side, shareable links.

Last 1 Hour Mode Interview Answer Mode Trap Mode Knowledge Tree Depth Levels
14
Topics
399
Concepts
112
Interview Patterns
168
Common Mistakes

Topics

Python

Backend

GIL, memory model, concurrency, decorators, MRO, generators

45–60 min
Mid–Senior

JavaScript

Frontend / Fullstack

Event loop, closures, prototypes, async/await, type coercion, ES6+

45–60 min
Mid–Senior

Node.js

Backend

Event loop phases, streams, worker threads, security, performance

45–60 min
Mid–Senior

Java

Backend

JVM internals, concurrency, HashMap internals, Spring, GC algorithms

50–60 min
Mid–Senior

Kubernetes & Docker

DevOps

Containers, pods, deployments, services, networking, and RBAC

50–60 min
Mid–Senior

DSA

Coding Interview

Big O, trees, graphs, dynamic programming, sorting, hash tables

60–75 min
Mid–Senior

System Design

Architecture

Scalability, caching, CAP theorem, databases, messaging, reliability

60–90 min
Senior

High-Level Design

Architecture

Microservices, event-driven, API design, observability, CQRS, sagas

60–75 min
Senior

Low-Level Design

OOP / Patterns

SOLID, design patterns (Gang of Four), OOP, concurrency patterns

50–60 min
Mid–Senior

Databases

Data

OLTP vs OLAP, PostgreSQL, MongoDB, Snowflake, ClickHouse, BigQuery — when to use what

60–75 min
Mid–Senior

React

Frontend / Fullstack

Hooks, fiber architecture, reconciliation, server components, performance optimization

45–60 min
Mid–Senior

AWS / Cloud

DevOps

EC2, Lambda, S3, IAM, VPC, DynamoDB, CloudFormation — core cloud interview topics

50–65 min
Mid–Senior

SQL Deep Dive

Data

Window functions, CTEs, query plans, indexes, transactions, MVCC, database internals

45–60 min
Mid–Senior

AI Coding Agents

AI / Agents

Claude Code, CLAUDE.md, skills, subagents, MCP, prompt caching, hooks — how to use Claude & Codex effectively

45–60 min
Mid–Senior