JSON quiz

Test your JSON knowledge with a free interactive quiz — 22 questions with answers and explanations. No signup needed to play.

Can JSON represent a top-level array, like `[1, 2, 3]`?

1. Can JSON represent a top-level array, like `[1, 2, 3]`?
2. What does it mean that JSON is "language-independent"?
3. What is the `reviver` function in `JSON.parse(text, reviver)` used for?
4. What is the standard MIME type for JSON in HTTP?
5. Which values are NOT valid JSON numbers?
6. Which of these is NOT a valid JSON value type?
7. Are comments allowed in standard JSON?
8. How does JSON represent the absence of a value?
9. Compared to XML, a key characteristic of JSON is:
10. What does JSON Schema provide?
11. Is `{ "a": 1, "a": 2 }` valid JSON, and what typically happens?
12. How are special characters like a double quote or newline represented inside a JSON string?

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