Android Json Parsing Interview Questions

JSON Interview Questions – For Freshers

JSON is a faster and more accessible data exchange format. JSON (JavaScript Object Notation) is a platform and language-independent data format. JSON is a wire protocol that specifies a data format for data exchange/communication between processes/applications.

10) Mention what is the role of JSON.stringify?

  • JSON file type for JSON files is “.json”
  • The MIME type for JSON text is “application/json”
  • Explain what JSON-RPC and JSON Parser are.

    JSON RPC is a basic remote procedure call protocol similar to XML-RPC but uses the lightweight JSON format instead of XML. JSON Parser is a tool for parsing JSON data. JavaScript, PHP, and jQuery can parse it. Mentioning the JSON file extension JSON is a type of data format.

    3 What is JSON Formatter, and how does it work?

    The JSON Formatter & Validator aids in debugging JSON data by formatting and validating it so that it can be read easily by humans.

    3 What is the purpose of a JSON Validator?

    The JSON Validator aids in the debugging of JSON data by formatting and verifying it so that humans can read it.

    3 In JavaScript, what exactly is JSON?

    Because JSON is derived from the JavaScript programming language, it makes sense to utilise it as a data format in JavaScript. JavaScript Object Notation is abbreviated as JSON.

    3 Why is JSON used in PHP?

    The JSON decode function transforms a JSON encoded string into a PHP variable. Built-in JSON methods are available in PHP frameworks like Symfony and Laravel.

    What is the function of JSON.stringify?

    JSON.stringify() converts an object to JSON text and saves the result as a string.

    2 What do JSON and XML have in common?

    JSON and XML have a lot of similarities. Its as follows:

  • JSON and XML are both used when transferring data between systems.
  • JSON and XML are both human-readable and have a simple structure.
  • Both are language agnostic.
  • JSON and XML support nested or hierarchical structures.
  • Both of them are simple to parse using a variety of programming languages.
  • Both these structures support Unicode.
  • JSON (JavaScript Object Notation) is a straightforward data exchange format to interchange the server’s data, and it is a better alternative for XML. This is because JSON is a lightweight and structured language. Android supports all the JSON classes such as JSONStringer, JSONObject, JSONArray, and all other forms to parse the JSON data and fetch the required information by the program. JSON’s main advantage is that it is a language-independent, and the JSON object will contain data like a key/value pair. In general, JSON nodes will start with a square bracket ([) or with a curly bracket ({). The square and curly bracket’s primary difference is that the square bracket ([) represents the beginning of a JSONArray node. Whereas, the curly bracket ({) represents a JSONObject. So one needs to call the appropriate method to get the data. Sometimes JSON data start with [. We then need to use the getJSONArray() method to get the data. Similarly, if it starts with {, then we need to use the getJSONobject() method. The syntax of the JSON file is as following:

    6) Mention what is JSON-RPC and JSON Parser?

  • JSON RPC: It is a simple remote procedure call protocol same as XML-RPC although it uses the lightweight JSON format instead of XML
  • JSON Parser: JSON parser is used to parse the JSON data into objects to use its value. It can be parsed by javaScript, PHP and jQuery
  • Android – Fetch data from server and JSON parsing

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