by Bhavya Sri, on Mar 15, 2018 12:54:33 PM
Q1. What is the full form of JSON?
Ans: JSON stands for JavaScript Object Notation.
Q2. What is the definition of JSON?
Ans: It is a text-based format and designed for the exchange of data between two different systems. It is lightweight data-interchange format as compare to XML. It uses JavaScript syntax. JSON data can be read and use by any programming language.
Q3. What is JSON used for?
Ans: JSON is used for communication between server side technologies and mobile app or website.
Q4. What is the file extension of JSON?
Ans: The file extension of JSON is .json.
Q5. Who created the JSON?
Ans: Douglas Crockford
Q6. Who is Father of JSON?
Ans: Douglas Crockford
Q7. Why It is so popular?
Ans:
- It is light weight standard for exchange information
- It is independent of language
- It is independent of Hosting Server
- Human Readable
- Easy to Encode
- Easy to Decode
- Used in Mobile application
Q8. What is file extension of JSON?
Ans: json
Q9. What is the rule for writing JSON?
Ans:
- JSON is the collection of key and value pair separated by the comma.
- Key and value are separated by the colon (:).
- Square brackets are used to store JSON array.
- Curly brackets are used to hold JSON objects.
Q10. How many data types are there in JSON?
Ans: There are six types of data types in JSON -
- Number
- String
- Boolean
- Array
- Object
- Null
Q11. JSON vs. XML?
Ans:
- XML requires XML parser to parse it. JSON is parsed with the help of JavaScript functions.
- XML is heavy and verbose. JSON is short and lightweight.
- File extension of XML data is .xml. File extension of JSON data is .json.
- XML is document based. JSON is data based.
- JSON is simple to read, write and understand. XML is less simple to read, write and understand.
- Array is supported by JSON. Array is not supported by XML.
- JSON stands for JavaScript Object Notation. XML stands for Extensible Markup Language.
Q12. What is MIME type for JSON data?
Ans: MIME type is application/json.
Q13. Which functions are used for encoding and decoding JSON in PHP?
Ans: For encoding, json_encode() function is used. This function takes PHP value like array as input and returns JSON representation of it. For decoding, json_decode() function is used. This function takes JSON string as input and returns associative array.
Q14. What is the use of JSON.stringify() function?
Ans: JSON.stringify() function is used to convert a JavaScript value(Object) into a JSON string.
Q15. What is MIME type for JSON data?
Ans: MIME type is application/json.
Q16. Which functions are used for encoding and decoding JSON in PHP?
Ans: For encoding, json_encode() function is used. This function takes PHP value like array as input and returns JSON representation of it. For decoding, json_decode() function is used. This function takes JSON string as input and returns associative array.
Q17. What is the use of JSON.stringify() function?
Ans: JSON.stringify() function is used to convert a JavaScript value(Object) into a JSON string.
Q18. What is the purpose of JSON.parse() function?
Ans: This function is used to convert JSON string into a JavaScript object.
Q19. What is JSON Parser?
Ans: JSON Parser is used to parse the JSON data into object to use its value. JSON can be parse by javaScript, jQuery and PHP.
Q20.What is JSON-RPC?
Ans: Remote Procedure call protocol with use of JSON. It is similar to XML-RPC only difference, It use JSON instead of XML.
Q21. What is JSON-RPC-Java?
Ans: JSON-RPC-Java is a Java implementation of the JSON-RPC protocol.
Q22. How to create json from php array?
Ans: $array = array('name'=>'PHP Tutorial','Description'=>'Web technology experts notes');
echo json_encode($array);
Q23. How to get PHP array from json Object?
Ans: $object='{"name":"PHP Tutorial","Description":"Expert in web technology"}'; $array = json_decode($object);
Q24. How to parse JSON in JavaScript?
Ans: var json = '{"name":"PHP Tutorial","Description":"Web technology experts notes"}'
var obj = JSON.parse(json);
//alert(obj.name);
Q25. How to create JSON Object from JavaScript?
Ans: var obj = {}; obj['name']='php-tutorial-php.blogspot.in'; //string obj['age'] = 32; // integer. obj['marks']= [80,70,60,50,60,80]; //array
Q26. How to parse JSON in jQuery?
Ans: var json = '{"name":"PHP Tutorial","Description":"Web technology experts notes"}'
obj = $.parseJSON(json);
//alert(obj.name);
Q27. How to Validate json in php?
Ans: $json = '{"name":"PHP Tutorial","Description":"Web technology experts notes"}';
$obj = json_decode($json);
if(is_null($obj)) {
die('Invalid JSON');
}
Q28. How to Validate json in javascript?
Ans: function isValidJson(jsonData) { try { JSON.parse(jsonData); return true; } catch (e) { return false; } } var json = '{"name":"PHP Tutorial","Description":"Web technology experts notes"}' isValidJson(json);
Q29. How to Validate json in jQuery?
Ans: function isValidJson(jsonData) { try { $.parseJSON(jsonData); return true; } catch (e) { return false; } } var json = '{"name":"PHP Tutorial","Description":"Web technology experts notes"}' isValidJson(json);
Q30. How to get JSON response in Ajax?
Ans:
$.ajax({
dataType: "json",
url: '/ajax/url',
data: 'name=php-tutorial-php',
success: function(data){
//data
}
});
