Zod quiz

Test your Zod knowledge with a free interactive quiz — 27 questions with answers and explanations. No signup needed to play.

How do you mark a field as optional in a Zod object schema?

1. How do you mark a field as optional in a Zod object schema?
2. `type User = z.infer<typeof userSchema>` is used to:
3. `z.union([z.string(), z.number()])` produces a schema that accepts:
4. `schema.refine(predicate, { message: "..." })` is used to:
5. Which is the right Zod schema for a plain string?
6. `z.string().email()` checks that the string:
7. `schema.pick({ name: true })` and `schema.omit({ email: true })` are used to:
8. By default, what happens to unknown keys when parsing an object schema?
9. Which schema validates an object with `name: string` and `age: number`?
10. Which adds a length range to a string schema?
11. Which Zod schema represents an array of strings?
12. How do you make a field accept `null` but not be omitted?

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