Linkiden

Question 1

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

Answer 1

$schema

Question 2

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

Answer 2

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

Question 3

Which JavaScript method converts a JavaScript value to Json?

Answer 3

JSON.stringify()

Question 4

Which data type is NOT part of JSON standard?

Answer 4

date

Question 5

Which term is commonly used to refer to converting data to JSON

Answer 5

serialization

Question 6

Which code uses the correct JSON syntax to encode the key/value pair shown?
accountNum: ‘000605802’

Answer 6

“accountNum”: “00060504”

Question 7

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?

Answer 7

\

Question 8

Which date type is part of the JSON standard?

Answer 8

Boolean

Question 9

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

Answer 9

required

Question 10

Which is the valid JSON equivalent of the data shown? *** MISSING OPTIONS & “DATA SHOWN”

Answer 10

{
  	"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"],
  	}
  }

Question 11

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

Answer 11

Escape all whitespaces expect space characters.

Question 12

What data type is represented by the value of the key/value pair shown?
<code>loggedIn: true<code></code></code>

Answer 12

Boolean

Question 13

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

Answer 13

“loggedIn”: true

Question 14

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

Answer 14

the element

Question 15

Which value is supported in the JSON specifications?

Answer 15

null

Question 16

Which JavaScript method converts a Json to JavaScript value?

Answer 16

JSON.parse()

Question 17

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.

Answer 17

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

Question 18

Which code uses valid JSON syntax for the text “Centennial Olympics?

Answer 18

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

Question 19

Can trailing commas be used in objects and arrays?

Answer 19

no

Question 20

Which whitespace characters should be escaped within a string?

Answer 20

new lines and carriage returns only

Question 21

Which is supported by YAML but not supported by JSON?

Answer 21

comments

Question 22

Which is an invalid JSON value?

Answer 22

“\s()(X 72()|/||*”

Question 23

How do you encode a date in JSON?

Answer 23

Encode the date as string using the ISO-8601 date format.

Question 24

What’s wrong with this JavaScript?

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

Answer 24

The value supplied to JSON.parse() is not a string.

Question 25

What does this JavaScript code print?
printNullness(JSON.parse(‘{ “lemmings”: [] }’));
printNullness(JSON.parse(‘{ “lemmings”: null }’));
printNullness(JSON.parse(‘{ “lemmings”: “null” }’));

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

Answer 25

not null null not null

Question 26

What tool might you use to validate your JSON?

Answer 26

JSONLint

Question 27

What characters denote strings in JSON?

Answer 27

double quotes

Question 28

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

Answer 28

“constant”: “6.022E23”

Question 29

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

Question 30

Why do so many APIs use JSON?

Answer 30

Because it’s based on JavaScript.

Question 31

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’ ] }

Answer 31

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

Question 32

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

Answer 32

XML

Question 33

How is a true boolean value represented in JSON?

Answer 33

“true”