Multiple choice, concept by concept

Zero values, declarations, printing, types, operators, and control flow.

Errors, slices, strings, pointers, structs, interfaces, packages and tests.

Getting started plus the first half of Core language: functions, defer, slices, maps, strings, pointers and structs.

All of Getting started and Core language mixed together, through interfaces, errors, packages, JSON and testing.

Maps, slices, heaps, runes, binary search and backtracking, with the Go traps.

Goroutines, channels, select, mutexes, races, and context.

Concurrency mixed with what came before: goroutines, channels, locks, context and the basics they lean on.

Type parameters, constraints, and knowing what is already written for you.

net/http routing, handlers, middleware, shutdown, and project layout.

Pools, placeholders, scanning, transactions, and N+1.

Web servers, tooling and databases, mixed with the core language and concurrency they rely on.

Flat, by layer, by domain, and the four-file CRUD shape.

Hashing, JWTs, middleware, and sessions you can actually end.

Validation, random codes, redirects, clashes, and a Postgres store.

go.mod, versioning, build flags, and what runs in CI.

Errors at the edge, logging, limits, containers, and profiling.

The questions that actually get asked, and what a good answer sounds like.

Roles, file uploads, carts, and transactions that must not half-happen.

Every question from every section. Save this one for just before an interview.