- schema
- $schema
- JsonSchema
- JSONschema
[
'red',
'blue',
'green'
]
- A
["red", "green", "blue"]- B
["red", "blue", "green"]- C
{
"color": "red",
"color": "blue",
"color": "green"
}- D
{
"red": "red",
"blue": "blue"
}- JSON.parse()
- JSON.stringify()
- JSON.toString()
- JSON.objectify()
- string
- number
- date
- array
- unpacking
- serialization
- deserialization
- parsing
accountNum: '000605802'
- "accountNum": "000605802"
- accountNum: "000605802"
- "accountNum": 000605802
- accountNum: 000605802
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?
-
/ -
\ -
: -
{
- Boolean
- map
- promise
- function
- important
- base
- core
- required
{
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"]
}
}- Escape all whitespaces except space characters.
- Escape line breaks.
- Escape paragraphs.
- Remove all whitespaces
loggedIn: true
- string
- Boolean
- number
- object
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}
- an
<origin>element - a header request
- the
<script>element - the XMLHttpRequest object
- undefined
- infinity
- NaN
- null
- JSON.parse()
- JSON.stringify()
- JSON.toString()
- JSON.objectify()
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
- 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"
}- yes
- only if there is more than one item
- no
- only when arrays and objects contain more than 10 items
- All whitespace is allowed.
- double quotes, slashes new lines, and carriage returns
- new lines and carriage returns only
- double quotes only
- nested
- comments
- arrays
- null values
-
"'|=(_)(X 72(_)|\/||\*'" -
"|=(_)(X 72(_)|\/||\*" -
"|=(_)(X\" \"72(_)|\/||\*" -
"\s(_)(X 72(_)|\/||\*"
- 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.
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.
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
- JSONLint
- ValidateJSON
- JSONFiddle
- TextEdit
- double quotes
- smart (curly) quotes
- single or double quotes
- single quotes
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.
-
<object> -
<script> -
<json> -
<meta>
- 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.
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
- TRUE
- "true"
- 1
- true
- ['tatooine', 'hoth', 'dagobah']
- [tatooine, hoth, dagobah]
- ["tatooine", "hoth", "dagobah",]
- ["tatooine", "hoth", "dagobah"]
[
{
"year": 2024
},
{
"location": "unknown"
}
]- object
- array
- number
- string
- trailing commas
- trailing decimals
- whitespace
- leading zeroes
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
- Escape the number with a backslash.
- Enclose the number in double quotes.
- Enclose the number in single quotes.
- Leave the number as is.
- "lastVisit": null
- lastVisit: null
- "lastVisit": 0
- "lastVisit": undefined
- 128514
- d83dde02
- \uD83D\uDE02
- 😂
- "largest": "blue whale"
- largest: 'blue whale'
- 'largest': 'blue whale'
- largest: "blue whale"
- data
- schemadata
- schematype
- type
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'
- 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
- colon
- space
- semicolon
- comma
- :
- ->
- ::
- .
- 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
- Fractional and Transcendental
- Infinity or Rational
- Rational and Irrational
- Infinity or NaN
- As a string with quotes
- As a string without quotes
- As a string in ISO 8583 format
- As a string in ISO 8601 format
- 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.
- list
- array
- struct
- indexed hash
- arrays, strings, numbers, true/false
- hashes, arrays, strings, numbers, booleans, null
- arrays, objects, lists, strings, numbers, booleans
- objects, arrays, strings, numbers, booleans, null
- key: "value"
- "key": "value"
- key, "value"
- 'key': 'value'
{
"result": [
{
"year": 2024
},
{
"location": "unknown"
}
]
}- number
- array
- string
- 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.
- 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.
"name": 'bb-8'- name: "bb-8"
- "name": 'bb-8'
- "name": "bb-8"
- "name": bb-8
- with brackets
- with colons
- with commas
- with parentheses
- any language, as JSON is language agnostic.
- Ruby
- JavaScript
- Python
- only numbers
- any valid JSON value
- only strings and numbers
- only strings
- reserialization
- nesting
- memorization
- minimization
-
[] -
{} -
"" -
()
- text/json
- text/javascript
- application/json
- data/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
- 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.
-
* -
# -
^ -
"
- 10,000
- 1000
- There is no defined limit.
- 1 million
- a swarm
- multiple resources
- a collection
- a group
- yes, but only if they are enclosed in quotes
- only with integers
- yes
- no
- dash and dot
- dash and comma
- comma and exclamation point
- dot and comma
- JSON.ingest()
- JSON.convert()
- JSON.read()
- JSON.parse()
- with right arrows
- with colons
- with semicolons
- with commas
- zero
- one
- two
- three
- arrays; objects
- objects; functions
- arrays; functions
- key/value pairs; arrays
- true, false, null
- true, false
- TRUE, FALSE, NULL
- 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.
- 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
- 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"
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;- ||
- {}
- ()
- []
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.
- arrays
- null values
- comments
- nested
YAML supports # comments but not JSON
-
"'|=(_)(X 72(_)|\/||*'" -
"\s(_)(X 72(_)|\/||*" -
"|=(_)(X\" \"72(_)|\/||*" -
"|=(_)(X 72(_)|\/||*"
{"rey",'leia',"ashoka",}
-
['rey', 'leia', "ashoka",} -
['rey', 'leia', 'ashoka',} -
["rey", "leia", "ashoka"] -
{"rey", "leia", "ashoka"}
- zero or more digits
- one or more digits
- a period
- a dollar sign
{
"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.
-
99999999999999999999 -
"42" -
-32 -
1111.00.110011
- 512 characters
- There is no defined limit.
- 2,056 characters
- 1,024 characters
-
JSON.convert() -
JSON.stringify() -
JSON.export() -
JSON.string()
{
"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.
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.
{ 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"] } }
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
- an
<origin>element - a header request
- the
<script>element - the XMLHttpRequest object
- All whitespace is allowed.
- double quotes, slashes new lines, and carriage returns
- new lines and carriage returns only
- double quotes only
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' ] }
-
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" ]} }
- 128514
- d83dde02
- \uD83D\uDE02
- 😂
- 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.
- trailing commas
- trailing decimals
- whitespace
- leading zeroes
- 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"
}[
{
"year": 2024
},
{
"location": "unknown"
}
]- object
- array
- number
- string
-
"'|=(_)(X 72(_)|\/||\*'" -
"|=(_)(X 72(_)|\/||\*" -
"|=(_)(X\" \"72(_)|\/||\*" -
"\s(_)(X 72(_)|\/||\*"
- Whole Numbers and Decimals
- Real Numbers and Fractions
- Integer, Floating Points, and Exponents (Scientific Notation, e.g., 3e4)
- Prime Numbers and Complex Numbers
- To validate JSON data
- To store sensitive information
- To represent information between parties
- To create JSON schemas
- Remote procedure calls encoded in JSON
- Rendering graphics in web applications
- JavaScript execution control
- Data validation in JSON
- 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
- 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()
- 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