Question 6: What is a 'null' value in JSON, and how does it relate to a JSON format error?

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Question 6: What is a 'null' value in JSON, and how does it relate to a JSON format error?
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A 'null' value in JSON represents the absence of a value. A JSON format error often arises when a field is expected to contain a value but is intentionally set to null, or when a field is not allowed to be null.