JSON quiz

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

Why should you avoid `eval()` to parse JSON in JavaScript?

1. Why should you avoid `eval()` to parse JSON in JavaScript?
2. What does `JSON.parse` throw when given malformed JSON?
3. Is `{ "a": 1, "a": 2 }` valid JSON, and what typically happens?
4. How are special characters like a double quote or newline represented inside a JSON string?
5. What does JSON Schema provide?
6. What does it mean that JSON is "language-independent"?
7. What does `JSON.stringify(value)` do in JavaScript?
8. How must object keys be written in JSON?
9. What does JSON stand for?
10. Are comments allowed in standard JSON?
11. How does JSON represent the absence of a value?
12. What is the standard MIME type for JSON in HTTP?

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