Parsing query strings in Node.js - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is a query string in a URL?

A query string is the part of a URL that comes after the question mark (?) and contains key-value pairs used to pass data to the server or application.

beginner

Which Node.js module is commonly used to parse query strings?

The built-in Node.js module called querystring is commonly used to parse and stringify query strings.

beginner

How do you parse a query string using the querystring module?

Use querystring.parse(queryString) to convert a query string into a JavaScript object with keys and values.

intermediate

What is the difference between querystring.parse() and URLSearchParams in Node.js?

querystring.parse() is a simple parser for query strings, while URLSearchParams is a modern Web API that provides more features and better encoding support for URL query parameters.

beginner

How can you convert an object back into a query string in Node.js?

Use querystring.stringify(object) to convert a JavaScript object into a query string format.

What character marks the start of a query string in a URL?

A /

B #

C &

D ?

The question mark (?) marks the start of the query string in a URL.

Which Node.js module can parse query strings?

A http

B fs

C querystring

D path

The querystring module is designed to parse and stringify query strings.

What does querystring.parse('name=John&age=30') return?

A 'name=John&age=30'

B { name: 'John', age: '30' }

C ['name', 'John', 'age', '30']

D null

It returns an object with keys and values parsed from the query string.

Which method converts an object to a query string in Node.js?

A querystring.stringify()

B URLSearchParams.toString()

C JSON.stringify()

D querystring.parse()

querystring.stringify() converts an object into a query string.

What is a benefit of using URLSearchParams over querystring?

A Better encoding and decoding of parameters

B Supports nested objects

C Faster parsing

D Works only in browsers

URLSearchParams provides better encoding and decoding support for URL parameters.

Explain how to parse a query string in Node.js and convert it back to a string.

Think about the two main functions in the querystring module.

Describe the difference between the Node.js querystring module and URLSearchParams for parsing query strings.

Consider features and encoding support.