json-quiz.md

JSON

Q1. By convention, what name is used for the first key in a JSON schema?

• schema
• $schema
• JsonSchema
• JSONschema

Reference

Q2. Which code is the closest JSON equivalent of the data shown?

[
    'red',
    'blue',
    'green'
]

• A

["red", "green", "blue"]

• B

["red", "blue", "green"]

• C

{
  "color": "red",
  "color": "blue",
  "color": "green"
}

• D

{
  "red": "red",
  "blue": "blue"
}

Q3. Which JavaScript method converts a JavaScript value to Json?

• JSON.parse()
• JSON.stringify()
• JSON.toString()
• JSON.objectify()

Reference

Q4. Which data type is NOT part of JSON standard?

• string
• number
• date
• array

Reference

Q5. Which term is commonly used to refer to converting data to JSON?

• unpacking
• serialization
• deserialization
• parsing

Q6. Which code uses the correct JSON syntax to encode the key/value pair shown?

accountNum: '000605802'

• "accountNum": "000605802"
• accountNum: "000605802"
• "accountNum": 000605802
• accountNum: 000605802

Reference

Q7. What character do you specify before a JSON control character when you want to use that control characters as a literal part of a string?

• /
• \
• :
• {

Reference

Q8. Which data type is part of the JSON standard?

• Boolean
• map
• promise
• function

Reference

Q9. Which key name is used to specify properties that must be included for JSON to be valid?

• important
• base
• core
• required

Q10. Which is the valid JSON equivalent of the data shown?

{
	photo: {
	width: 1600,
	height: 900,
	binaries: {
	url: 'https://www.example.com/images/34097349843',
	thumbnail: 'https://www.example.com/images/thumbs/34097349843'
	},
	animated: false,
	tags: [116, 943, 234, 38793],
	}
}

• A

{
  "photo": {
    "width": 1600,
    "height": 900,
    "binaries": {
      "url": "https://www.example.com/images/34097349843",
      "thumbnail": "https://www.example.com/images/thumbs/34097349843"
    },
    "animated": "false",
    "tags": [116, 943, 234, 38793]
  }
}

• B

{
  "photo": {
    "width": 1600,
    "height": 900,
    "binaries": {
      "url": "https://www.example.com/images/34097349843",
      "thumbnail": "https://www.example.com/images/thumbs/34097349843"
    },
    "animated": false,
    "tags": [116, 943, 234, 38793]
  }
}

• C

{
  "photo": {
    "width": 1600,
    "height": 900,
    "binaries": {
      "url": "https://www.example.com/images/34097349843",
      "thumbnail": "https://www.example.com/images/thumbs/34097349843"
    },
    "animated": true,
    "tags": [116, 943, 234, 38793]
  }
}

• D

{
  "photo": {
    "width": "1600",
    "height": "900",
    "binaries": {
      "url": "https://www.example.com/images/34097349843",
      "thumbnail": "https://www.example.com/images/thumbs/34097349843"
    },
    "animated": "false",
    "tags": ["116", "943", "234", "38793"]
  }
}

Reference

Q11. How do you store several paragraphs of text as a string in JSON?

• Escape all whitespaces except space characters.
• Escape line breaks.
• Escape paragraphs.
• Remove all whitespaces

Q12. What data type is represented by the value of the key/value pair shown?

loggedIn: true

• string
• Boolean
• number
• object

Reference

Q13. If you need to store the loggedIn status of a user in JSON as a boolean, what is the correct syntax?

• "loggedIn": (true)
• loggedIn: "true"
• "loggedIn": true
• loggedIn: {true}

Reference

Q14. What does JSON with padding (JSON-P) use to make a request?

• an <origin> element
• a header request
• the <script> element
• the XMLHttpRequest object

Q15. Which value is supported in the JSON specifications?

• undefined
• infinity
• NaN
• null

Reference

Q16. Which JavaScript method converts JSON to a JavaScript value?

• JSON.parse()
• JSON.stringify()
• JSON.toString()
• JSON.objectify()

Reference

Q17. Transferring JSON information from client to server and back again often includes HTTP requests. Match each method with the best choice describing its use.

1.Sends data to specific server to create or update information.
2.Sends data to specific server to create or update information without the risk of creating the resource more than once.
3.Previews what the GET request response might be without the body of the text.
4.Learns the communication channels used by the target source.
5.Requests information from a specific source.
6.Removes information.

• 1.POST 2.DELETE 3.OPTIONS 4.HEADER 5.GET 6.PUT
• 1.POST 2.PUT 3.HEADER 4.OPTIONS 5.GET 6.DELETE

Q18. Which code uses valid JSON syntax for the text "Centennial Olympics?

• A

{
"host": "Atlanta",
"year": 1996
/_ Centennial Olympics _/
}

• B

{
  "host": "Atlanta",
  "year": 1996
  // Centennial Olympics
}

• C

{
  "host": "Atlanta",
  "year": 1996,
  "comment": "Centennial Olympics"
}

• D

{
  "host": "Atlanta",
  "year": 1996,
  \"Centennial Olympics\"
}

• E

{
  "host": "Atlanta",
  "year": 1996,
  "comment": "\"Centennial Olympics"
}

Reference

Q19. Can trailing commas be used in objects and arrays?

• yes
• only if there is more than one item
• no
• only when arrays and objects contain more than 10 items

Reference

Q20. Which whitespace characters should be escaped within a string?

• All whitespace is allowed.
• double quotes, slashes new lines, and carriage returns
• new lines and carriage returns only
• double quotes only

Reference

Q21. Which is supported by YAML but not supported by JSON?

• nested
• comments
• arrays
• null values

Reference

Q22. Which is an invalid JSON value?

• "'|=(_)(X 72(_)|\/||\*'"
• "|=(_)(X 72(_)|\/||\*"
• "|=(_)(X\" \"72(_)|\/||\*"
• "\s(_)(X 72(_)|\/||\*"

Q23. How do you encode a date in JSON?

• Convert the date to UTC and enclose in quotes.
• Encode the date as string using the ISO-8601 date format.
• Wrap the date in double quotes.
• Add a "date" key to your object and include the date as string.

Reference

Q24. What’s wrong with this JavaScript?

JSON.parse({"first": "Sarah", "last": "Connor"}) ;

• JSON should be wrapped with curly braces.
• JSON.parse() is missing an argument.
• The value supplied to JSON.parse() is not a string.
• Nothing is wrong with it.

Reference

Q25. What does this JavaScript code print?

printNullness(JSON.parse('{ "lemmings": [] }'));
printNullness(JSON.parse('{ "lemmings": null }'));
printNullness(JSON.parse('{ "lemmings": "null" }'));

function printNullness(testMe) {
  if (testMe.lemmings == null) console.log('null');
  else console.log('not null');
}

• A

not null
null
not null

• B

null
null
not null

• C

not null
null
null

• D

null
null
null

Q26. What tool might you use to validate your JSON?

• JSONLint
• ValidateJSON
• JSONFiddle
• TextEdit

Reference

Q27. What characters denote strings in JSON?

• double quotes
• smart (curly) quotes
• single or double quotes
• single quotes

Reference

Q28. Which code is a valid JSON equivalent of the key/value pair shown that also preserves the data type? constant: 6.022E23

• "constant": "6.022E23"
• "constant": "6\.022\E23"
• "constant": 6.022E23
• constant: "6.022E23"

Reference Explanation: Scientific Notation is a valid JSON number. You can use e or E.

Q29. Which element is added to the DOM to create a JSON-P request?

• <object>
• <script>
• <json>
• <meta>

Q30. Why do so many APIs use JSON?

• Because it's object-based.
• Because it's a simple and adaptable format for sharing data.
• Because it's based on JavaScript.
• Because it is derived from SGML.

Reference

Q31. You need to assemble a list of members, but your JSON is not parsing correctly. How do you change it?

{
  "avengers": [
    "iron man",
    "hulk",
    "thor",
    "black widow",
    "ant man",
    "spider man'
  ]
}

• A

{
  "avengers": ["iron man", "hulk", "thor", "black widow", "ant man", "spider man"]
}

• B

{
  'avengers': [
  {'iron man',
  'hulk',
  'thor',
  'black widow',
  'ant man',
  'spider man'}
  ]
}

• C

{
  "avengers": ["iron man", "hulk", "thor", "black widow", "ant man", "spider man"]
}

• D

{
  "avengers": {[
    "iron man",
    "hulk",
    "thor",
    "black widow",
    "ant man",
    "spider man"
  ]}
}

Q32. When building dynamic web applications using AJAX, developers originally used the _ data format, which has since been replaced by JSON.

• XML
• GRAPHQL
• REST
• SOAP

Q33. How is a true boolean value represented in JSON?

• TRUE
• "true"
• 1
• true

Reference

Q34. Which array is valid JSON?

• ['tatooine', 'hoth', 'dagobah']
• [tatooine, hoth, dagobah]
• ["tatooine", "hoth", "dagobah",]
• ["tatooine", "hoth", "dagobah"]

Reference

Q35. What data type is encoded in the outermost component of the JSON shown?

[
  {
    "year": 2024
  },
  {
    "location": "unknown"
  }
]

• object
• array
• number
• string

Reference

Q36. Which is ignored by JSON but treated as significant by YAML?

• trailing commas
• trailing decimals
• whitespace
• leading zeroes

Reference

Q37. When you need to set the value of a key in JSON to be blank, what is the correct syntax for the empty value?

• FALSE
• 0
• ""
• null

Reference

Q38. How do you assign a number value in JSON?

• Escape the number with a backslash.
• Enclose the number in double quotes.
• Enclose the number in single quotes.
• Leave the number as is.

Q39. Which code uses the correct JSON syntax for encoding a key/value pair with a null value?

• "lastVisit": null
• lastVisit: null
• "lastVisit": 0
• "lastVisit": undefined

Reference

Q40. Which reference to the Unicode character U+1F602 complies with the JSON standard?

• 128514
• d83dde02
• \uD83D\uDE02
• 😂

Q41. Which code uses the correct JSON syntax for a key/Value pair containing a string?

• "largest": "blue whale"
• largest: 'blue whale'
• 'largest': 'blue whale'
• largest: "blue whale"

Reference

Q42. Which key name is used to specify data type in a JSON schema?

• data
• schemadata
• schematype
• type

Reference

Q43. Which code is a valid JSON equivalent of the key/value pair shown that also preserves the original value?

• "UPC": \043875
• UPC: "043875"
• "UPC": 043875
• UPC: '043875'

Reference

Q44. Which data format is a JSON schema written in?

• markdown
• YAML
• XML
• JSON

Q45. Which code is valid JSON equivalent of the key/value pair shown that also preserves the data type?

• "variance": -0.0823
• variance: "-0.0823"
• "variance": "-0.0823"
• variance: -0.0823

Reference

Q46. With what character should key/value pairs be separated?

• colon
• space
• semicolon
• comma

Reference

Q47. What character separates keys from values?

• :
• ->
• ::
• .

Reference

Q48. If a string contains line breaks, what should you do?

• Wrap line breaks in single quotation marks
• Make no changes, because whitespace is allowed
• Replace any line breaks with \r
• Replace any line breaks with \n

Q49. Which number types are available in javascript but not supported in json?

• Fractional and Transcendental
• Infinity or Rational
• Rational and Irrational
• Infinity or NaN

Q50. How should a date value be stored in JSON?

• As a string with quotes
• As a string without quotes
• As a string in ISO 8583 format
• As a string in ISO 8601 format

Reference

Q51. Is the JSON code shown here valid?

• No, emojis must be escaped with a backslash.
• No, JSON strings are not allowed to use emojis.
• No, emojis should never be enclosed with double quotes.
• Yes, emojis are valid characters because JSON strings are unicode.

Q52. What data structure do you use to encode ordered information?

• list
• array
• struct
• indexed hash

Reference

Q53. What are valid values in JSON?

• arrays, strings, numbers, true/false
• hashes, arrays, strings, numbers, booleans, null
• arrays, objects, lists, strings, numbers, booleans
• objects, arrays, strings, numbers, booleans, null

Q54. Which key format is valid JSON?

• key: "value"
• "key": "value"
• key, "value"
• 'key': 'value'

Reference

Q55. What data type is encoded in the outermost component of the JSON shown?

{
  "result": [
    {
      "year": 2024
    },
    {
      "location": "unknown"
    }
  ]
}

• number
• array
• string
• object

Q56. What's wrong with this JSON object?

{
  "series": "Star Trek",
  "episodes": "The Trouble with Tribbles",
  "season": 3
}

• Key/value pairs should be separated by semicolons.
• Keys should be enclosed with double quotes.
• Key/value pairs should always have a trailing comma.
• Keys and values should be enclosed with single quotes.

Q57. How should comments be formatted in JSON?

• Wrap the comments in single quotes and place it at the bottom of the file.
• Wrap the comments in double parentheses.
• Escape comments by placing two slashes at the start of the comment.
• JSON does not support comments.

Q58. How would you make the following string valid in JSON?

"name": 'bb-8'

• name: "bb-8"
• "name": 'bb-8'
• "name": "bb-8"
• "name": bb-8

Q59. How are values separated in JSON?

• with brackets
• with colons
• with commas
• with parentheses

Q60. With which programming language is JSON best used?

• any language, as JSON is language agnostic.
• Ruby
• JavaScript
• Python

Q61. What values can arrays contain?

• only numbers
• any valid JSON value
• only strings and numbers
• only strings

Q62. What technique can be used to represent complex objects with JSON?

• reserialization
• nesting
• memorization
• minimization

Q63. What characters are used to enclose an array?

• []
• {}
• ""
• ()

Q64. What is the official MIME type for JSON?

• text/json
• text/javascript
• application/json
• data/json

Q65. Which character cannot be part of string within JSON without additional formatting?

• /
• "
• -
• :

Q66. What is the purpose of JSON?

• to provide a simple way to serialize and deserialize data between different sources
• to provide a way to store data for machine learning
• to provide an archival solution for data warehousing
• to provide a way for JavaScript to run other languages

Q67. Can you assume the order of keys in an object?

• No, but you can sort the keys with JSON.sort().
• Yes, object keys are always ordered alphabetically.
• Yes, but only when the object is first parsed.
• No, you can never assume object keys will be in order.

Q68. With what character should object keys be enclosed?

• *
• #
• ^
• "

Q69. What is the maximum number of key/value pairs that JSON supports?

• 10,000
• 1000
• There is no defined limit.
• 1 million

Q70. What is the recommended term used to refer to multiple resources?

• a swarm
• multiple resources
• a collection
• a group

Q71. Does JSON support signed numbers?

• yes, but only if they are enclosed in quotes
• only with integers
• yes
• no

Q72. What two nonnumerical characters can numbers contain?

• dash and dot
• dash and comma
• comma and exclamation point
• dot and comma

Q73. What JavaScript method is used to load JSON data?

• JSON.ingest()
• JSON.convert()
• JSON.read()
• JSON.parse()

Q74. How are the values in an array separated?

• with right arrows
• with colons
• with semicolons
• with commas

Q75. What is the minimum number of values in an array?

• zero
• one
• two
• three

Q76. In JSON, a set of brackets ([]) is used to denote _, whereas curly braces ({}) denote _.

• arrays; objects
• objects; functions
• arrays; functions
• key/value pairs; arrays

Q77. How does JSON represent truth, falsity and nullness?

• true, false, null
• true, false
• TRUE, FALSE, NULL

Q78. If an object key contains spaces, how can you access its value in JavaScript?

• Remove spaces from the key before accessing the value.
• Use dot notation to access the value.
• Use object key index to access the value.
• Use bracket notation to access the value.

Q79. When parsing JSON, "caching" is a method used to _.

• remove duplicate data from a server
• temporarily store data for faster access
• store excess information in chunks to be reviewed later
• clog up a web browser with useless information

Q80. What is the only valid whitespace character within a string that does not require an escape character?

• line break
• space
• tab
• return

Q81. What technique can you use to safely encode very large numbers?

• Store the number as a string
• Convert the number into an exponent.
• Round the number to the nearest 10-digit number.
• Split the number into smaller parts.

Q82. Which code is a valid JSON equivalent of the key/value pair shown that also preserves the data type?

variance: -0.0823

• variance: "-0.0823"
• variance: -0.0823
• "variance": "-0.0823"
• "variance": "-0.0823"

Reference

Q83. Based on the JSON object shown, which JavaScript code would you use to find out what is in this vehicle's glove box while assigning the glove box contents to a new variable?

myVehicleContents = {
  van: {
    inside: {
      'glove box': 'maps',
      'passenger seat': 'crumbs',
    },
    exterior: {
      trunk: 'jack',
    },
  },
};

• A

myVehicleContents.van.inside['glove box'] = gloveBoxContents;

• B

var gloveBoxContents = myVehicleContents.van.inside['glove box'];
gloveBoxContents;

• C

var gloveBoxContents = myVehicleContents.van.glove box.contents;
gloveBoxContents;

• D

myVehicleContents.van.inside['inside'] = gloveBoxContents;

Source

Q84. What characters are used to define an object?

• ||
• {}
• ()
• []

Q85. The JSON structure features nested objects and arrays. Sometimes the data containing these features exists in relational databases. How is the relational structure different that JSON?

• It has a flat architecture.
• It has a rewritable structure.
• It has an array-only structure.
• It has a table structure.

Q86. What is supported by YAML but not supported by JSON?

• arrays
• null values
• comments
• nested

YAML supports # comments but not JSON

Q87. Which is an invalid JSON value? (same as previous question, but different possible answers)

• "'|=(_)(X 72(_)|\/||*'"
• "\s(_)(X 72(_)|\/||*"
• "|=(_)(X\" \"72(_)|\/||*"
• "|=(_)(X 72(_)|\/||*"

Q88. How can you change this array to make it valid?

{"rey",'leia',"ashoka",}

• ['rey', 'leia', "ashoka",}
• ['rey', 'leia', 'ashoka',}
• ["rey", "leia", "ashoka"]
• {"rey", "leia", "ashoka"}

Q89. If a non-zero number starts with a zero, what character should immediately follow the zero?

• zero or more digits
• one or more digits
• a period
• a dollar sign

Q90. Who would you modify the array below to store additional attributes for each student?

{
  "students": ["Tess", "Erin", "June"]
}

• Convert each student to an object, then add key/value paris to each student object as needed.
• Add additional name/value pairs, separated by commas, after "students".
• Convert each student into an array and add extra elements to the array.
• Wrap the existing "students" key with curly braces.

Q91. Which is not a valid JSON number

• 99999999999999999999
• "42"
• -32
• 1111.00.110011

Q92. What is the maximum string length in JSON?

• 512 characters
• There is no defined limit.
• 2,056 characters
• 1,024 characters

Q93. What method is used to export a JavaScript object into JSON notation?

• JSON.convert()
• JSON.stringify()
• JSON.export()
• JSON.string()

Q94. How would you update this JSON to indicate that Jane is now available for part-time work ?

{
  "name": "Jane",
  "job": "developer",
  "skills": ["ruby", "rails", "javascript"],
  "available": false
}

• A

{
  "name": "Jane",
  "job": "developer",
  "skills": ["ruby", "rails", "javascript"],
  "available": true,
  "seeking": "part-time"
}

• B

{
  "name": "Jane",
  "job": "developer",
  "skills": ["ruby", "rails", "javascript"],
  "available": "true",
  "seeking": "part-time"
}

• C

{
  "name": "Jane",
  "job": "developer",
  "skills": ["ruby", "rails", "javascript"],
  "available": false,
  "seeking": "part-time"
}

• D

{
  "name": "Jane",
  "job": "developer",
  "skills": ["ruby", "rails", "javascript"],
  "available": "true",
  "seeking": "part-time"
}

Hint: true needs to be a boolean and part-time a string so in double quotes.

Q95. When you need to set the value of a key in JSON to be blank, what is the correct syntax for the empty value?

• ""
• 0
• FALSE
• null

Explanation: The other options won't work as well, as demonstrated by this StackOverflow post.

Q96. What is true about paginated reports? (Select all that apply.)

A. They are formatted to fit well on a page.

B. They shrink the report data to fit on a page.

C. They truncate the report data to fit on a single page.

D. They are both printable and shareable.

• A,D
• B OR C
• A,B,D
• A,C,D

Explanation: The true statements about paginated reports are: A. They are formatted to fit well on a page. D. They are both printable and shareable. So the correct options are A and D.

Q97. As a Scrum Master you have noticed a pattern that the most interesting stories on the sprint backlog get started right away, and the least interesting stories languish or don't get done. What should you do?

• During story point estimation, increase the points assigned to the least interesting stories so the team can boost their velocity.
• Share your observation with the team and invite them to own and solve the problem.
• Ask the team to use a lottery system to assign each story.
• Ask the Tech Lead to assign every story to a developer so they all get done efficiently and with accountability.

Explanation: Encourage open communication within the team and involve them in problem-solving to find a solution that works best for their specific context and helps address the issue of disinterest in certain stories.

Q98. Which is the valid JSON equivalent of the data shown?

json{photo: {width: 1600, height: 900, binaries: { url: 'https://www.example.com/images/34097349843', thumbnail: 'https://www.example.com/images/thumbs/34097349843' }, animated: false, tags: [116, 943, 234, 38793], }}

• {"photo": {"width": 1600, "height": 900, "binaries": { "url": "https://www.example.com/images/34097349843", "thumbnail": "https://www.example.com/images/thumbs/34097349843"}, "animated": "false", "tags": [116, 943, 234, 38793]}}

• {"photo": {"width": 1600, "height": 900, "binaries": { "url": "https://www.example.com/images/34097349843", "thumbnail": "https://www.example.com/images/thumbs/34097349843"}, "animated": false, "tags": [116, 943, 234, 38793]}}

• {"photo": {"width": 1600, "height": 900, "binaries": {"url": "https://www.example.com/images/34097349843", "thumbnail": "https://www.example.com/images/thumbs/34097349843"}, "animated": true, "tags": [116, 943, 234, 38793]}}

• {"photo": {"width": "1600", "height": "900", "binaries": { "url": "https://www.example.com/images/34097349843", "thumbnail": "https://www.example.com/images/thumbs/34097349843"}, "animated": "false", "tags": ["116", "943", "234", "38793"]}}

Q99. When you need to set the value of a key in JSON to be blank, what is the correct syntax for the empty value?

• FALSE
• 0
• ""
• null

Q100. What does JSON with padding (JSON-P) use to make a request?

• an <origin> element
• a header request
• the <script> element
• the XMLHttpRequest object

Q101. Which whitespace characters should be escaped within a string?

• All whitespace is allowed.
• double quotes, slashes new lines, and carriage returns
• new lines and carriage returns only
• double quotes only

Q102. What’s wrong with this JavaScript?

JSON.parse({"first": "Sarah", "last": "Connor"}) ;

• JSON should be wrapped with curly braces.
• JSON.parse() is missing an argument.
• The value supplied to JSON.parse() is not a string.
• Nothing is wrong with it.

Q103. You need to assemble a list of members, but your JSON is not parsing correctly. How do you change it?

{"avengers": ["iron man", "hulk", "thor", "black widow", "ant man", "spider man" ]}

• {"avengers": ["iron man", "hulk", "thor", "black widow", "ant man", "spider man"]}

• {'avengers': {'iron man', 'hulk', 'thor', 'black widow', 'ant man', 'spider man'}]}

• {"avengers": ["iron man", "hulk", "thor", "black widow", "ant man", "spider man"]}

• {"avengers": {["iron man", "hulk", "thor", "black widow", "ant man", "spider man" ]}}

Q104. Which reference to the Unicode character U+1F602 complies with the JSON standard?

• 128514
• d83dde02
• \uD83D\uDE02
• 😂

Q105. How should comments be formatted in JSON?

• Wrap the comments in single quotes and place it at the bottom of the file.
• Wrap the comments in double parentheses.
• Escape comments by placing two slashes at the start of the comment.
• JSON does not support comments.

Q106. What is the purpose of JSON-P (JSON with padding) in web development, and how is it typically used?

• To validate JSON data before parsing it in JavaScript.
• To provide additional padding for JSON objects to improve readability.
• To overcome the same-origin policy limitation when making cross-domain AJAX requests.
• To compress JSON data for faster transmission over the network.

Explanation:- JSON-P, or JSON with padding, serves the purpose of overcoming the same-origin policy limitation in web development. The same-origin policy restricts web pages from making AJAX requests to a different domain for security reasons. JSON-P works by wrapping JSON data in a JavaScript function call, allowing data to be retrieved from an external domain as if it were a script. This technique is commonly used for securely fetching data from external APIs, making it a valuable tool for cross-domain data exchange in web applications.

Q107. In a JSON document, how can you represent a key that contains special characters, such as spaces or hyphens, to ensure proper parsing and access in JavaScript?

• Wrap the key in single quotes.
• Enclose the key in square brackets.
• backslashes before special characters.
• Enclose the key in double quotes.

Explanation:- When you have a key in a JSON document that contains special characters, spaces, or hyphens, it is essential to enclose the key in double quotes. JSON requires keys to be represented within double quotes to ensure proper parsing and access in JavaScript. This ensures that JavaScript can correctly interpret keys with special characters or spaces and access their associated values.

Q108. Which is ignored by JSON but treated as significant by YAML?

• trailing commas
• trailing decimals
• whitespace
• leading zeroes

Q109. Which code uses valid JSON syntax for the text "Centennial Olympics?

• A

{
"host": "Atlanta",
"year": 1996
/_ Centennial Olympics _/
}

• B

{
  "host": "Atlanta",
  "year": 1996
  // Centennial Olympics
}

• C

{
  "host": "Atlanta",
  "year": 1996,
  "comment": "Centennial Olympics"
}

• D

{
  "host": "Atlanta",
  "year": 1996,
  \"Centennial Olympics\"
}

• E

{
  "host": "Atlanta",
  "year": 1996,
  "comment": "\"Centennial Olympics"
}

Q110. What data type is encoded in the outermost component of the JSON shown?

[
  {
    "year": 2024
  },
  {
    "location": "unknown"
  }
]

• object
• array
• number
• string

Q111. Which is an invalid JSON value?

• "'|=(_)(X 72(_)|\/||\*'"
• "|=(_)(X 72(_)|\/||\*"
• "|=(_)(X\" \"72(_)|\/||\*"
• "\s(_)(X 72(_)|\/||\*"

Q112. What are the valid number types in JSON?

• Whole Numbers and Decimals
• Real Numbers and Fractions
• Integer, Floating Points, and Exponents (Scientific Notation, e.g., 3e4)
• Prime Numbers and Complex Numbers

Q114. What is the purpose of JSON Web Tokens (JWT)?

• To validate JSON data
• To store sensitive information
• To represent information between parties
• To create JSON schemas

Q115. What is JSON-RPC used for?

• Remote procedure calls encoded in JSON
• Rendering graphics in web applications
• JavaScript execution control
• Data validation in JSON

Q116. Which of the following is a key difference between JSON and XML?

• JSON uses tags
• XML is more lightweight
• JSON is easier for humans to read
• XML is used for programming, while JSON is for data exchange

Q117. Which HTTP header is commonly used to prevent cross-site scripting (XSS) attacks when working with JSON?

• Content-Encoding
• Access-Control-Allow-Origin
• JSON-Security
• XSS-Prevention

Q118. What does the JSON Merge Patch format allow you to do?

• Combine multiple JSON documents into one
• Partially update a JSON document
• Compress JSON data for storage
• Convert JSON to XML

Q119. Which method is used to parse a JSON string and return a JavaScript object in modern web browsers?

• parseJSON()
• JSON.parse()
• evalJSON()
• loadJSON()

Q120. What is the primary purpose of JSON-LD (JSON Linked Data)?

• To enable two-way data binding in JavaScript
• To represent data in a more human-readable format
• To express structured data that is linked to other data
• To create dynamic web pages with JSON