Backend Engineering Quizzes
Scenario-based assessments designed to test your mental models of runtime internals, distributed storage, network protocols, system design, and security. Choose a topic below to begin.
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Node.js
Event Loop phases, Libuv thread pool, stream backpressure, V8 garbage collection & microtasks.
SQL
Index traversal, EXPLAIN plans, composite column ordering, joins & query optimization.
Databases & Storage
ACID transactions, isolation levels, write-ahead logging (WAL), sharding & NoSQL stores.
APIs & Protocols
RESTful semantics, idempotency contracts, gRPC/Protobuf, GraphQL & rate limiting.
Networking & Transport
TCP 3-way handshakes, TLS 1.3 resumption, HTTP/2 vs HTTP/3 QUIC & socket buffers.
System Design
CAP theorem, consistent hashing, distributed message queues, cache stampedes & circuit breakers.
Docker & Containers
Linux namespaces, cgroups, multi-stage builds, container networking & image layer caching.
Cloud Architecture
Object storage presigned URLs, Kubernetes pod lifecycles, service discovery & IAM security.
Security & Auth
OAuth 2.1 with PKCE, JWT revocation, bcrypt/Argon2id, OWASP API Top 10 & CSRF/XSS defenses.