Complex Json Test - 45+ MCQs: JSON test: Evaluate Your Knowledge with JSON Questions and Answers

1. What is the purpose of the JSON Hypertext Application Language (HAL) format?

To represent hypermedia controls in JSON data

To create animated JSON hyperlinks

To encrypt JSON data

JSON HAL is not a valid format

2. Which method is used to check if a key exists in a JSON object in JavaScript?

keyExists()

JSON.containsKey()

Object.hasOwnProperty()

json.isKeyPresent()

3. What is the significance of the MIME type 'application/json'?

It indicates that the content is in JSON format

It specifies a compressed JSON file

It is used for JSON-based web pages

MIME types do not apply to JSON

4. Which file extension is commonly used for JSON files?

.json

.jsn

.data

.jsobj

5. In JSON, what is the purpose of an array?

To store key-value pairs

To represent a sequence of values

To define object properties

Arrays are not used in JSON

6. How is a JSON array different from a JSON object?

Arrays are ordered, objects are unordered

Arrays can only contain numbers, objects can only contain strings

Objects are ordered, arrays are unordered

There is no difference between arrays and objects in JSON

7. Which symbol is used to denote the start and end of a JSON object?

{}

[]

()

8. What is the purpose of the JSON Lines format?

To represent multi-line JSON strings

To separate JSON objects with newlines

To create a JSON-based chat system

JSON Lines is not a valid format

9. Which data type is not supported in JSON?

Number

Boolean

Undefined

Date

10. Which character is used to separate key-value pairs in a JSON object?

, (comma)

. (period)

: (colon)

; (semicolon)

11. How can you include a nested object within a JSON object?

Enclose the nested object in square brackets

Enclose the nested object in curly braces

Use single quotes for the nested object

Nested objects are not allowed in JSON

12. How is a comment added in a JSON file?

// This is a comment

# This is a comment

/* This is a comment */

' This is a comment

13. Which of the following is a valid JSON array?

[1, 'apple', true, null]

{1, 'apple', true, null}

(1, 'apple', true, null)

[1; 'apple'; true; null]

14. What is the purpose of the JSON-LD (JSON for Linked Data) format?

To represent JSON data with linked references

To create a JSON-based language definition

To compress JSON data for storage

JSON-LD is not a valid JSON format

15. What is the purpose of a JSON array?

To represent a key-value pair

To store a sequence of values

To define object properties

Arrays are not used in JSON

16. How is null represented in JSON?

null

undefined

void

nil

17. Which data types can be used in JSON?

String, Number, Boolean, Array, Object, Null

Integer, Float, Boolean, List, Dictionary, None

Text, Numeric, TrueFalse, Set, Hash, Undefined

Character, Decimal, True, False, Void, Empty

18. In JSON, how is an object key represented?

As plain text

Enclosed in single quotes

Enclosed in double quotes

As is, without any special symbols

19. Which method is used to validate a JSON schema against JSON data in JavaScript?

json.validate()

JSON.verifySchema()

jsonSchema.validate()

AJV (Another JSON Schema Validator)

20. What is the purpose of the JSON Merge Patch format?

To merge multiple JSON files into one

To represent patches for updating JSON documents

To compress JSON data for faster transmission

JSON Merge Patch is not a valid JSON format

21. What does JSON.parse() do in JavaScript?

Converts a JSON string to an object

Converts an object to a JSON string

Creates a new JSON file

No such function in JavaScript

22. What is the purpose of the JSON Web Token (JWT)?

To encode and decode JSON data

To create animated JSON images

To secure communication between parties

JSON does not support tokens

23. What is the purpose of the JSON Pointer?

To point to a specific value within a JSON document

To draw arrows in JSON diagrams

To define the order of elements in a JSON array

JSON does not support pointers

24. Which method is used to pretty-print a JSON string in JavaScript?

JSON.stringify()

JSON.parse()

json.print()

stringify.JSON()

25. How is a JSON object different from a JavaScript object?

There is no difference; they are the same

JSON objects have a schema, JavaScript objects do not

JavaScript objects can have functions as values, JSON objects cannot

JSON objects cannot contain arrays, JavaScript objects can

26. In JSON, how is a string represented?

Enclosed in double quotes

Enclosed in single quotes

No quotes needed

Enclosed in backticks

27. Which method is used to stringify a JavaScript object into a JSON-formatted string?

JSON.stringify()

JSON.parse()

object.stringify()

stringify.JSON()

28. In JSON, what is the purpose of a boolean value?

To represent text

To represent true/false conditions

To define object properties

Booleans are not used in JSON

29. Which method is used to add an element to the end of a JSON array in JavaScript?

array.push()

array.add()

array.append()

array.insert()

30. What is the purpose of the JSON-RPC protocol?

To request and receive JSON data over a network

To remotely control JSON files

To rotate JSON images

JSON-RPC is not a valid JSON protocol

31. How can you represent a null value in a JSON file?

null

nil

undefined

NaN

32. What does the term 'serialization' mean in the context of JSON?

Converting an object to a JSON-formatted string

Converting a JSON string to an object

Creating a new JSON file

Serializing is not applicable in JSON

33. In JSON, how is a number represented?

As plain text

Enclosed in double quotes

As is, without any special symbols

Enclosed in single quotes

34. Which JSON data type is used to represent a date?

Date

Time

DateTime

JSON does not have a specific date type

35. Which RFC defines the JSON format?

RFC 4627

RFC 791

RFC 675

RFC 3339

36. What is the purpose of the JSONP (JSON with Padding) technique?

To add extra padding to JSON data

To enable cross-origin resource sharing (CORS)

To create a JSON playlist

JSONP is not a valid JSON technique

37. In JSON, how is a boolean value 'true' represented?

True

Yes

The letter 'T' in uppercase

38. What is the purpose of the JSON Schema?

To define the structure and constraints of JSON data

To create a new JSON file

To convert JSON to XML

JSON does not have a schema

39. What does the JSON Patch format enable?

To apply partial modifications to a JSON document

To create new JSON documents

To encrypt JSON data

JSON Patch is not a valid format

40. Which symbol is used to separate key and value pairs in a JSON object?

JSON MCQ Test 1