Go

Go Web Frameworks

Gin, Echo, Fiber, Chi, routing, middleware, validation, error handling, best practices

20 interview questionsยท
Mid-Level
1

What primarily distinguishes Gin from other Go web frameworks?

Answer

Gin is known for its high performance through its radix tree-based router with zero allocation. It offers a Martini-like API but with up to 40x better performance. Gin also includes built-in JSON validation and robust middleware handling, making it a popular choice for high-performance REST APIs.

2

In Gin, how to extract a dynamic route parameter /users/:id?

Answer

Gin uses c.Param to extract dynamic route parameters defined with colons. The syntax is simple and straightforward: the parameter name exactly matches the one defined in the route. This method returns a string that must then be converted if needed to the desired type.

3

What is the main advantage of Fiber over Gin and Echo?

Answer

Fiber is built on Fasthttp instead of standard net/http, which allows it to achieve exceptional performance with a reduced memory footprint. It offers an Express.js-inspired API, familiar to Node.js developers. However, this approach means it's not compatible with standard net/http middleware and requires its own specific middleware.

4

How to implement middleware in Gin that executes before all handlers?

5

In Echo, what is the difference between echo.GET and echo.Group?

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