You want to define a GraphQL type Order that includes an id (non-null ID), a list of items (each an Item type), and a total price (non-null Float). Which is the correct type definition?

hard📝 schema Q15 of 15

GraphQL - Schema Definition Language (SDL)

You want to define a GraphQL type Order that includes an id (non-null ID), a list of items (each an Item type), and a total price (non-null Float). Which is the correct type definition?

Atype Order { id: ID! items: [Item!]! total: Float! }

Btype Order { id: ID items: Item total: Float }

Ctype Order { id: ID! items: [Item]! total: Float! }

Dtype Order { id: ID! items: [Item!] total: Float }

Step-by-Step Solution

Solution:

Step 1: Analyze each field requirement
'id' must be non-null ID, 'items' is a non-null list of non-null Item, 'total' is non-null Float.
Step 2: Match the correct syntax
type Order { id: ID! items: [Item!]! total: Float! } correctly uses ID!, [Item!]! (list non-null and items non-null), and Float!.
Final Answer:
type Order { id: ID! items: [Item!]! total: Float! } -> Option A
Quick Check:
Non-null fields and list syntax correct [OK]

Quick Trick: Use [Type!]! for non-null list of non-null items [OK]

Common Mistakes:

Missing non-null markers (!)
Using list without non-null item type
Confusing list syntax with single type

Master "Schema Definition Language (SDL)" in GraphQL

9 interactive learning modes - each teaches the same concept differently

Learn Why Deep Visual Try Challenge Project Recall Time

Want More Practice?

15+ quiz questions · All difficulty levels · Free

Free Signup - Practice All Questions

More GraphQL Quizzes

You want to define a GraphQL type Order that includes an id (non-null ID), a list of items (each an Item type), and a total price (non-null Float). Which is the correct type definition?

Step 1: Analyze each field requirement

Step 2: Match the correct syntax

Final Answer:

Quick Check:

Want More Practice?