Top JSON Interview Questions & Answers [2021]

JSON Interview Questions

JSON, the JavaScript Object Notation, is a readable, minimal format used to structure data. It is mainly used to transfer data within a web application and a server. It is an excellent alternative to the previously popular XML. Popular websites use JSON to organize and store the site content, which was created using the CMS. Interviewers use it to test the skills of programmers. We will discuss JSON Interview Questions here.

JSON Interview Questions

What is JSON?

JSON or the JavaScript Object Notation is a website development open-standard format. JSON is a standard data format used for server communication or asynchronous browsers replacing the XML or the Extensible Markup Language. Many online convertors and applications are available to help in accessing JSON files. 

Why is JSON a Popular Tool Nowadays?

JSON is a light-weight software that interchanges the format. It makes it easy for machines to generate and understand and for humans to write and read. It has recently gained popularity and makes use of readable text that communicates data objects. These consist of attribute-value pairs.

How is JSON Used?

JSON can be used in JavaScript externally instead of parsing and sterilizing the data. Until recently, XML used to be the only tool to access data. Now, JSON is proving out to be a great alternative. JSON Viewer is one of the many tools available online. 

What are the Advantages of using JSON?

Here are some advantages of using JSON:

  • JSON is considerably more comfortable for humans to read.
  • Computers can analyze the raw data efficiently using JSON.
  • Most programming languages support JSON. 
  • You can convert JSON to XML easily.
  • There are fewer value types and variables in JSON than XML.
  • JSON can use null, objects, booleans, strings, lists, and numbers. 
  • As JSON is compatible with virtually all programming languages, programmers find its features very attractive. They find JSON very convenient and are slowly switching to JSON from complicated formats like XML.
  • JSON doesn’t need knotty ending tags as XML does. 
  • The files in JSON are smaller than files of other formats. 
  • The syntax of JSON incorporates the same rules as JavaScript standards. This makes programmers who are familiar with JavaScript transition to JSON easily without much training. 
  • JSON does not require new definitions of tags, and you can use them directly. This feature simplifies the programming considerably.
  • Compatible with popular web browsers, you can add JSON to browsers easily. Like there are programs such as JSON Online Tools that can be added as extensions to Google Chrome. They can be used directly in the browser without any further installation. 
  • Online Tools can analyze all JSON data automatically.

What are some Online Tools Available for JSON?

Many tools are available online like JSON Beautifier, JSON Validator, JSON Editor, JSON Viewer and JSON Formatter. 

What is JSON Formatter?

These days most popular web browsers adopt JSON to store, receive, exchange, and send data over the internet. JSON Formatter is an open-source tool that gives the coding a very proper structure. You can change the format to a tree structure easily. It can analyze all the JSON data and spot mistakes in the code quickly. If the JSON Formatter can’t read the data, it issues a warning.

What is JSON Editor?

JSON editor is a prevalent tool that is used to make coding more sophisticated. It will list out all errors, and you can individually fix them using the software. The JSON Editor helps you improve your skills by pointing you any mistakes in your code’s syntax. Some of these features are also available in the JSON Viewer. The JSON Editor provides a very comfortable platform and points out errors in your code’s layout. 

What is JSON Validator?

The JSON Viewer also consists of an inbuilt validator, but it is also available independently. JSON Validator compares your code to standard JavaScript. It lists out the invalid syntax and any errors with the layout. The JSON Validator’s primary function is to make sure that your final code is compatible with JavaScript. After the JSON Validator’s confirmation, you can use the code directly in JavaScript. 

What is JSON Beautifier?

JSON Beautifier is a very widely used tool. It helps you in aligning the code correctly. The alignment helps in making the code beautiful and more readable. When someone else views your code, you probably want them to be very impressed. After beautifying your code, you can save effort and time in the modification process. 

What is JSON Format?

The JSON format is a text-based format used to write JavaScript syntax quickly and to maintain object data. The JSON format is a straightforward and convenient tool that dramatically simplifies data serialization. It provides many features that you can use more efficiently than XML format. In case the JSON viewer can’t analyze the text, it issues a warning and does not conduct any visualization.

What is JSON Viewer?

When you work with JSON, a JSON Viewer might be required. The JSON Viewer is very convenient and is available easily online. This tool evaluates all decoded characters and generates credible results, except that it can also upload web pictures. This feature works only if the image links are provided in fields for text fields. These unique features are present in numerous JSON Viewers. 

Why is an Online JSON Viewer Used?

Most data is being by using JSON nowadays. JSON is an excellent alternative to XML. It is very comprehensive, but people often find themselves wondering how to read these files. The spacing and structure in XML are relatively easy to decode. The best solution to this problem is to use the JSON Viewer. 

What are the Advantages of using a JSON Viewer?

Here are some advantages of the JSON Viewer:

  • JSON Viewers can easily format JSON variables and remove white blank spaces that might be undesirable. 
  • It is a user-friendly tool that provides simple methods to view the data and contents of JSON files.
  • A very compelling JSON Viewer allows users to paste JSON directly in text fields. 
  • Users can use the viewer tab to check the underlying tree structure. 
  • JSON Viewer also allows users to expand the entire tree element by element. 
  • The text field provides options such as removing white spaces and loading the JSON data using a URL. 
  • Using the JSON Viewer, users can easily change the JSON Data into the XML format. 
  • JSON Viewer is a flexible ready-to-use tool that doesn’t require advanced knowledge about computers. 
  • For these purposes, there are numerous free and comprehensive online JSON Viewers. 

How can you use filtering to get a better overview of the dashboard?

The latest dashboard of the JSON editor supports rich-filter capabilities. If used individually or in a unique combination, every filter can help you manage and find dashboards as per your need. Some of these are:

  • Name: Filters the dashboard name for any fields that contain the expression that is being filtered.
  • Ownership: This filter for ownership tells you if you are the dashboard owner or if they were shared with you.
  • Favorite: Filters for favorites provide you with dashboards that were previously marked favorites. 
  • Owner: This filter results in all dashboards that some specific user owns. 
  • Tag: Filters the dashboards that contain a particular tag.

How can you find dashboards easily using JSON editor?

To provide dashboards with some context, you can use JSON editor’s dashboard tags. Tags can tremendously help by introducing better segmentation for dashboards. This allows for easy retrieval and searching. Each tag on the dashboards in the list can be filtered. You can also use a filter consisting of many tags used as a combination. To do this, apply the filter Tag repeatedly. The search will become much more precise if you use more filters as search criteria. Adding tags is a straightforward process. You only need to edit the dashboard. Also, add other reasonable information which might be helpful to your colleagues. This way, they can understand the purpose of your dashboard better. 

Describe the “favorite” feature of the JSON Editor

Using the favorite option, you can mark the dashboard favorites by selecting a start button beside the dashboard’s name. The name is present on the dashboard or the list. Favorite dashboards, by default, show up on the top of the list. This is a user-based setting and is considered very helpful in ordering the dashboard list as per your preferences. The Favorite criteria are available in the form of a filter expression as well.

What are the advantages of using a JSON Editor?

Since dashboard management is a continuously evolving tool and is changing into automation, a rich API provides more visibility. The Advanced settings segment of the dashboards contains a potent JSON editor. Here are some of its features:

  • It can perform live adjustments on the dashboard’s JSON schema.
  • Features to edit the dashboard panel configurations directly like filter expressions or titles.
  • Use paste or copy functions on complete blocks across all dashboards.
  • Download the dashboard’s JSON structure to files or upload JSON files and overwrite the current configuration of the dashboard.  

Also read Good Questions to Ask an Interviewee in 2021

Top JSON Interview Questions & Answers [2021]

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