Zod quiz

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

`schema.transform(fn)` does what?

1. `schema.transform(fn)` does what?
2. How do you make a field accept `null` but not be omitted?
3. `z.string().regex(/^[a-z0-9-]+$/)` does what?
4. `schema.pick({ name: true })` and `schema.omit({ email: true })` are used to:
5. `z.discriminatedUnion("kind", [schemaA, schemaB])` is preferred over `z.union` when:
6. How do you validate that a value is a positive integer?
7. Which is the right Zod schema for a plain string?
8. Which adds a length range to a string schema?
9. `z.string().default("anonymous")` does what?
10. `type User = z.infer<typeof userSchema>` is used to:
11. Popular pairings for Zod in the TypeScript ecosystem include:
12. `objectSchema.extend({ extra: z.string() })` does what?

More quizzes