FREE GoLang Standard Library Questions and Answers

Question 1

Which of the following strings package functions are used to manipulate strings in Go?

Accepted Answer

strings.Contains

Answer

The `strings` package in Go provides a rich set of functions for string manipulation. `strings.Contains` checks if a substring is present, `strings.ToUpper` converts a string to uppercase, and `strings.Replace` replaces occurrences of a substring. `strings.Sort` is not a function in the `strings` package; sorting is typically done using the `sort` package on slices of strings.

Question 2

Which package is primarily used for file handling in Go?

Accepted Answer

os

Answer

The `os` package in Go provides a platform-independent interface to operating system functionality, including file and directory operations. While `io` provides basic interfaces for I/O primitives and `bufio` offers buffered I/O, `os` is the primary package for direct file handling like opening, creating, and removing files.

Question 3

Which functions from the encoding/json package are commonly used for JSON encoding and decoding in Go?

Accepted Answer

json.Marshal

Answer

The `encoding/json` package in Go provides functions for encoding and decoding JSON data. `json.Marshal` is used to encode a Go value into its JSON representation (a byte slice), and `json.Unmarshal` is used to decode JSON data into a Go value. These are the primary functions for converting between Go structs and JSON data.

Question 4

Which functions are used from the net/http package to set up an HTTP server in Go?

Accepted Answer

http.ListenAndServe

Answer

To set up an HTTP server in Go, `http.ListenAndServe` is commonly used to start the server and listen for incoming requests on a specified address and port. `http.HandleFunc` registers a function to handle requests for a given URL path. Together, these functions form the basic building blocks for a Go HTTP server.

Question 5

Which functions are used from the sort package to sort slices in Go?

Accepted Answer

sort.Ints

Answer

The `sort` package in Go provides functions for sorting slices of various types. `sort.Ints` sorts a slice of integers, `sort.Strings` sorts a slice of strings, and `sort.Float64s` sorts a slice of float64s. These specialized functions offer convenient ways to sort common primitive slice types.

GO - Golang Online Test Practice Test

GO - Golang Online Test Practice Test

FREE GoLang Standard Library Questions and Answers