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At high level, JSON will have two things- An object and an array. An object is a collection of name/value pairs and an array is an ordered list of values.With the combination of two, you can have a complete JSON structure. The maximum amount of documents that one can embed in a document is 100. This is a very important factor while working with MongoDB.
So an object will start with curly braces and end with curly braces and then comes the key and value. An array will start with the normal, non-curly brackets, then comes value and comma. There are data types that can be supported. See the image below to understand it better.
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