MCQs on Web Programming with Go | Go

Web programming with Go involves building HTTP servers, handling routes, middleware, and serving static files. Test your understanding of Go’s web frameworks, networking, and server-side programming with these MCQs.

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Building HTTP Servers with net/http

1. How do you import the Go package for building HTTP servers?
   a) import "http"
   b) import "net/http"
   c) import "web/http"
   d) import "server/http"
2. Which function is used to create a basic HTTP server in Go?
   a) http.ListenAndServe()
   b) http.NewServer()
   c) http.CreateServer()
   d) http.Start()
3. What does the http.HandleFunc() function do in Go?
   a) It creates a new HTTP request handler
   b) It defines a URL path and associates it with a function
   c) It starts the HTTP server
   d) It handles incoming HTTP requests
4. Which method is used to listen on a specific port in Go’s http package?
   a) http.Listen()
   b) http.ListenAndServe()
   c) http.NewListener()
   d) http.StartServer()
5. In Go, which function handles HTTP requests asynchronously?
   a) http.ListenAndServe()
   b) http.Handle()
   c) http.RequestHandler()
   d) http.HandleFunc()
6. What is the purpose of the http.ResponseWriter parameter in Go’s http.HandleFunc()?
   a) To process incoming requests
   b) To write the HTTP response to the client
   c) To define HTTP status codes
   d) To log HTTP requests
7. Which function is used to send an HTTP response in Go?
   a) http.SendResponse()
   b) http.Write()
   c) response.Write()
   d) response.WriteHeader()
8. What does http.ListenAndServe(":8080", nil) do in Go?
   a) It starts the server on port 8080 with no handler
   b) It starts the server on port 8080 with the default handler
   c) It binds the server to port 8080
   d) It listens for connections on port 8080 but does not start the server
9. Which method in Go is used to handle HTTP requests for a specific URL?
   a) http.Handle()
   b) http.HandleFunc()
   c) http.ListenAndServe()
   d) http.Request()
10. What does the http.NewServeMux() function do in Go?
    a) It creates a new HTTP server
    b) It creates a new router for handling HTTP requests
    c) It initializes the HTTP server
    d) It listens for incoming HTTP requests

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Handling Routes and Middleware

11. How do you define a custom route in Go using the net/http package?
    a) http.Handle("/route", handler)
    b) http.Route("/route", handler)
    c) http.NewRoute("/route", handler)
    d) http.HandleFunc("/route", handler)
12. What is the purpose of middleware in Go’s HTTP server?
    a) To modify HTTP requests before they reach the handler
    b) To route the request to an appropriate handler
    c) To manage HTTP status codes
    d) To log the request data
13. Which is the most common approach to implementing middleware in Go?
    a) By using http.HandleFunc()
    b) By wrapping the handler function
    c) By using http.Route()
    d) By manually modifying HTTP responses
14. What does the http.ServeHTTP() method do?
    a) It starts the HTTP server
    b) It dispatches requests to the appropriate handler
    c) It listens for incoming requests
    d) It processes and handles the HTTP request
15. Which Go function is typically used to create middleware that logs HTTP requests?
    a) log.Request()
    b) http.LogRequest()
    c) logHTTP()
    d) Custom handler function wrapping the main handler
16. What is the role of the http.Request object in Go web programming?
    a) It contains details about the HTTP response
    b) It holds information about the incoming HTTP request
    c) It provides methods for sending responses
    d) It stores information about HTTP headers
17. Which of the following is a valid use of a middleware in Go?
    a) Redirecting HTTP traffic
    b) Parsing HTTP body content
    c) Authentication and authorization checks
    d) All of the above
18. How do you chain multiple middleware functions in Go?
    a) By using http.MiddlewareChain()
    b) By wrapping one middleware inside another
    c) By calling multiple http.Handle() functions
    d) By using http.MultiMiddleware()
19. Which method is used to handle HTTP requests for specific routes with parameters in Go?
    a) http.Route()
    b) http.HandleFunc()
    c) http.Handle()
    d) http.RequestRoute()
20. What does the http.Handle("/path", handler) function do in Go?
    a) It defines a URL path and associates it with a handler function
    b) It starts an HTTP server
    c) It listens for requests at the specified URL
    d) It serves the HTTP response

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Serving Static Files

21. Which Go function is used to serve static files like images or CSS?
    a) http.ServeFile()
    b) http.ServeStatic()
    c) http.Static()
    d) http.FileServe()
22. How do you serve static files from a specific directory in Go?
    a) http.ServeFile("/path")
    b) http.ServeStatic("/path", "/static")
    c) http.ServeContent("/path", "/static")
    d) http.FileServer(http.Dir("/static"))
23. Which function in Go returns an HTTP handler to serve files from a directory?
    a) http.ServeFile()
    b) http.ServeStatic()
    c) http.FileServer()
    d) http.StaticHandler()
24. How do you restrict access to certain files while serving static content in Go?
    a) By setting permissions on the directory
    b) By using middleware to check for authorization
    c) By using custom HTTP handlers for specific file types
    d) Go does not support file access restrictions
25. Which of the following best describes the http.FileServer() function in Go?
    a) It returns an HTTP handler that serves files from a specified directory
    b) It serves dynamic content like HTML pages
    c) It handles only images and multimedia content
    d) It creates a new HTTP server for each request
26. How do you serve an HTML file using Go?
    a) Use http.ServeFile() with the file path
    b) Use http.ServeStatic() for the file path
    c) Use http.FileServe() to specify the file
    d) Use http.ServeContent() with an HTML file handler
27. What would you use http.ServeFile() for in Go?
    a) To send a file as the HTTP response
    b) To send dynamic data in the response
    c) To start a web server
    d) To authenticate requests for file access
28. Can Go serve files with custom headers, such as caching headers?
    a) Yes, by using custom http.ServeHTTP() handlers
    b) No, Go serves files with default headers only
    c) Yes, by modifying the http.FileServer() function
    d) No, Go cannot serve static files with custom headers
29. How do you handle requests for nonexistent static files in Go?
    a) By using middleware to return a 404 error
    b) By setting a default fallback route
    c) Go automatically returns a 404 for missing files
    d) Both a and b
30. How can you configure Go to serve static files from multiple directories?
    a) By chaining multiple http.FileServer() handlers
    b) By modifying the http.ServeFile() function
    c) By using a custom file path handler
    d) Go does not support serving files from multiple directories

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Answer Key

Qno	Answer
1	b) import "net/http"
2	a) http.ListenAndServe()
3	b) It defines a URL path and associates it with a function
4	b) http.ListenAndServe()
5	d) http.HandleFunc()
6	b) To write the HTTP response to the client
7	c) response.Write()
8	b) It starts the server on port 8080 with the default handler
9	b) http.HandleFunc()
10	b) It creates a new router for handling HTTP requests
11	d) http.HandleFunc("/route", handler)
12	a) To modify HTTP requests before they reach the handler
13	b) By wrapping the handler function
14	b) It dispatches requests to the appropriate handler
15	d) Custom handler function wrapping the main handler
16	b) It holds information about the incoming HTTP request
17	d) All of the above
18	b) By wrapping one middleware inside another
19	b) http.HandleFunc()
20	a) It defines a URL path and associates it with a handler function
21	a) http.ServeFile()
22	d) http.FileServer(http.Dir("/static"))
23	c) http.FileServer()
24	b) By using middleware to check for authorization
25	a) It returns an HTTP handler that serves files from a specified directory
26	a) Use http.ServeFile() with the file path
27	a) To send a file as the HTTP response
28	a) Yes, by using custom http.ServeHTTP() handlers
29	d) Both a and b
30	a) By chaining multiple http.FileServer() handlers