Go Generics in 2026: Type Parameters, Constraints and Interview Questions
Master Go generics for technical interviews with questions on type parameters, constraints, the tilde operator, and practical implementations like generic caches.
Go
BACKEND
Programming language developed by Google offering simplicity, performance and native concurrency. Minimalist architecture with fast compilation, goroutines for concurrency, and complete standard library to build REST APIs, microservices and high-performance backend applications.
What you'll learn
Simple and concise syntax with ultra-fast compilation
Goroutines and channels for native and lightweight concurrency
Rich standard library (net/http, encoding/json, testing)
Optimized garbage collector and low memory footprint
Static compilation producing self-contained binaries
Interfaces and duck typing for flexibility without inheritance
Native testing with go test, benchmarks and race detector
Web frameworks (Gin, Echo, Fiber) and ORMs (GORM, sqlx)
Explicit error handling with error checking pattern
Simplified deployment (Docker, Kubernetes) with static binaries
Key topics to master
The most important concepts to understand this technology and ace your interviews
1
Go basics: types, variables, functions, packages, imports
2
Structs, methods, interfaces and composition (embedding)
3
Goroutines: go keyword, concurrency vs parallelism, scheduler
4
Channels: buffered/unbuffered, select, range, close, patterns
5
Error handling: error type, wrapping errors, panic/recover
6
Pointers: &, *, pass by value vs reference, nil pointers
7
Slices and arrays: make, append, capacity, sub-slices
8
Maps: creation, access, deletion, iteration, zero values
9
Interfaces: empty interface, type assertions, type switches
10
Standard library: net/http, encoding/json, io, context
11
HTTP servers: http.Handler, http.HandlerFunc, multiplexers
12
Context: cancellation, timeouts, values, propagation
13
Testing: unit tests, table-driven tests, mocking, coverage
14
GORM: models, migrations, associations, preloading, hooks
15
Frameworks: Gin (routing, middleware), Echo, Fiber
16
Concurrency patterns: worker pools, pipelines, fan-out/fan-in
17
Middleware: chaining, authentication, logging, recovery
18
Performance: profiling (pprof), benchmarks, optimizations
19
Modules: go.mod, versioning, dependencies, vendoring
20
Deployment: Docker multi-stage builds, Kubernetes, static binaries
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