Recall & Review
beginner
What is a String scalar type in GraphQL?
A String scalar type represents textual data. It is used to store sequences of characters like names, descriptions, or any text.
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beginner
What kind of values does the Int scalar type hold in GraphQL?
The Int scalar type holds whole numbers without decimals, like 1, 42, or -7. It is used for counting or indexing.
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beginner
Explain the Float scalar type in GraphQL.
The Float scalar type stores numbers with decimals, such as 3.14 or -0.001. It is used for precise measurements or calculations.
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beginner
What does the Boolean scalar type represent in GraphQL?
The Boolean scalar type represents true or false values. It is used for yes/no or on/off conditions.
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beginner
What is the purpose of the ID scalar type in GraphQL?
The ID scalar type is a unique identifier, often used to identify objects. It is serialized as a string but treated specially to represent unique keys.
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Which scalar type would you use to store a user's age?
✗ Incorrect
Age is a whole number, so the Int scalar type is the best choice.
Which scalar type is best for storing a product price like 19.99?
✗ Incorrect
Float is used for numbers with decimals, like prices.
What scalar type would you use to represent a true/false value?
✗ Incorrect
Boolean stores true or false values.
Which scalar type is typically used for unique object identifiers?
✗ Incorrect
ID is used for unique identifiers, often serialized as strings.
If you want to store a person's full name, which scalar type should you choose?
✗ Incorrect
String is used for text like names.
Describe the five main scalar types in GraphQL and give a simple example for each.
Think about common data types you use in everyday life.
You got /5 concepts.
Explain why the ID scalar type is different from a String even though it is serialized as a string.
Consider how IDs help find specific items in a list.
You got /4 concepts.