JSON Interview Questions And Answers Guide.

JSON Interview Questions And

Answers Guide.

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JSON Interview Questions And Answers

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JSON Job Interview Preparation Guide.

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Question # 1

What is JSON?

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Question # 2

What is JSON Parser?

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Answer:JSON stands for JavaScript Object Notation, JSON is lightweight text-data interchange format it is language independent mean JSON uses JavaScript syntax for

describing data objects, but JSON is still language and platform independent. JSON parsers and JSON libraries exists for many different programming languages. It is

"self-describing" and easy to understand.

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Answer:The eval() function can compile and execute any JavaScript. This represents a potential security problem.

It is safer to use a JSON parser to convert a JSON text to a JavaScript object. A JSON parser will recognize only JSON text and will not compile scripts.

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Question # 4

How to convert JSON Text to a JavaScript Object?

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Answer:JSON objects are written inside curly brackets,

Objects can contain multiple name/values pairs.

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Question # 3

Explain JSON Objects?

Answer:One of the most common use of JSON is to fetch JSON data from a web server (as a file or as an HttpRequest), convert the JSON data to a JavaScript object, and

then it uses the data in a web page.

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Question # 5

Which browsers provide native JSON support?

Answer:Native JSON support is included in newer browsers and in the newest ECMAScript (JavaScript) standard.

Web Browsers Support:

* Firefox (Mozilla) 3.5

* Internet Explorer 8

* Chrome

* Opera 10

* Safari 4

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Question # 6

Explain JSON Values?

Answer:JSON values can be:

* A number (integer or floating point)

* A string (in double quotes)

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JSON Interview Questions And Answers

* A Boolean (true or false)

* An array (in square brackets)

* An object (in curly brackets)

* null

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Question # 7

Explain JSON Arrays?

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Answer:JSON arrays are written inside square brackets.

An array can contain multiple objects:

JSON Arrays

{

"studeents": [

{ "firstName":"Ali" , "lastName":"Khan" },

{ "firstName":"John" , "lastName":"Sena" },

{ "firstName":"Kate" , "lastName":"Winslet" }

]

}

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Question # 8

Explain Syntax of JSON using JavaScript?

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Answer:JSON is smaller than XML, and faster and easier to parse. Below is a basic syntax of JSON

JSON CODE

{

"studeents": [

{ "firstName":"Ali" , "lastName":"Khan" },

{ "firstName":"John" , "lastName":"Sena" },

{ "firstName":"Kate" , "lastName":"Winslet" }

]

}

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Question # 9

Explain Syntax of JSON?

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Answer:Because JSON uses JavaScript syntax, no extra software is needed to work with JSON within JavaScript.

With JavaScript you can create an array of objects and assign data to it like this:

JSON CODE

{

"studeents": [

{ "firstName":"Ali" , "lastName":"Khan" },

{ "firstName":"John" , "lastName":"Sena" },

{ "firstName":"Kate" , "lastName":"Winslet" }

]

}

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Question # 10

Explain JSON Syntax Rules?

Answer:JSON syntax is a subset of the JavaScript object notation syntax.

* Data is in name/value pairs

* Data is separated by comma

* Curly brackets holds objects

* Square brackets holds arrays

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Question # 11

What is JSON file type?

Answer:The file type for JSON files is ".json"

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Question # 12

What is MIME type for JSON?

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JSON Interview Questions And Answers

The MIME type for JSON text is "application/json"

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