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JSON Interview Questions

In this post we will look at JSON Testing Tool Interview questions. Examples are provided with explanation.

Q: Explain what is JSON?
JSON (JavaScript Object Notation) is a lightweight data-interchange format. It is easy for humans to read and write. It is easy for machines to parse and generate. It is based on a subset of the JavaScript Programming Language
The JSON format is often used for serializing and transmitting structured data over a network connection. It is used primarily to transmit data between a server and web application, serving as an alternative to XML.

Q: What are the advantages and disadvantages of using JSON?
The Advantages of using JSON are as follows-
  • Smaller message size
  • More structural information in the document
  • Can easily distinguish between the number 1 and the string "1" as numbers, strings (and Booleans) are represented differently in JSON.
  • Can easily distinguish between single items and collections of size one (using JSON arrays).
  • Easier to represent a null value
  • Easily consumed by JavaScript
The Advantages of using XML are as follows-
  • Namespaces allow for sharing of standard structures
  • Better representation for inheritance
  • Standard ways of expressing the structure of the document: XML schema, DTD, etc
  • Parsing standards: DOM, SAX, StAX
  • Standards for querying: XQuery and XPath
  • Standards for transforming a document: XSLT

Q: What is JSON RPC?
JSON-RPC is a stateless, light-weight remote procedure call (RPC) protocol. Primarily this specification defines several data structures and the rules around their processing. ..It uses JSON (RFC 4627) as data format.

Q: What data types are supported by JSON?
  • string
  • object
  • array
  • boolean
  • null

See Also

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