JSON for human-readable data in IOT Protocols - Cheat Sheet & Quick Revision

Recall & Review

beginner

What does JSON stand for?

JSON stands for JavaScript Object Notation. It is a simple format to store and exchange data in a way that is easy for humans to read and write.

beginner

Why is JSON considered human-readable?

JSON uses plain text with clear structure using braces, brackets, and key-value pairs, making it easy for people to understand and edit without special tools.

beginner

Which characters are used to define an object and an array in JSON?

In JSON, curly braces { } define an object, and square brackets [ ] define an array.

beginner

How are key-value pairs written in JSON?

Key-value pairs in JSON are written as "key": value, where the key is a string in double quotes, followed by a colon and the value.

beginner

What types of values can JSON have?

JSON values can be strings, numbers, objects, arrays, true, false, or null.

Which symbol is used to start a JSON object?

A {

B [

C (

D <

JSON objects start with curly braces { }.

In JSON, how are keys written?

A Double quotes

B Single quotes

C Without quotes

D Backticks

JSON keys must be strings enclosed in double quotes.

Which of these is NOT a valid JSON value?

A true

B 123

C null

D undefined

"undefined" is not a valid JSON value.

What does JSON primarily help with?

A Encrypting data

B Making data human-readable and easy to exchange

C Compressing files

D Running programs

JSON is designed to store and exchange data in a human-readable way.

Which of these is a valid JSON array?

A {"name": "John"}

B (1, 2, 3)

C [1, 2, 3]

D "[1, 2, 3]"

Square brackets [ ] define arrays in JSON.

Explain what JSON is and why it is useful for human-readable data exchange.

Think about how JSON looks and why people like to use it.

Describe the basic syntax rules of JSON including how objects and arrays are represented.

Focus on the symbols and structure used in JSON.