You want to define a GraphQL object type Author that includes a list of Book objects. Which is the correct way to define the books field?

hard📝 Application Q15 of 15

GraphQL - Schema Definition Language (SDL)

You want to define a GraphQL object type Author that includes a list of Book objects. Which is the correct way to define the books field?

Abooks: [Book]

Bbooks: Book[]

Cbooks: List<Book>

Dbooks: {Book}

Step-by-Step Solution

Solution:

Step 1: Recall GraphQL list syntax
GraphQL uses square brackets around a type to indicate a list, e.g., [Book].
Step 2: Evaluate each option
books: [Book] uses correct GraphQL syntax. Options A, B, and C use syntax from other languages or invalid formats.
Final Answer:
books: [Book] -> Option A
Quick Check:
Lists use square brackets in GraphQL [OK]

Quick Trick: Use square brackets for lists in GraphQL types [OK]

Common Mistakes:

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