Why GraphQL performance needs attention - Test Your Understanding

Practice - 5 Tasks

1fill in blank

easy

Complete the code to fetch user data with GraphQL.

GraphQL

query { user(id: [1]) { name email } }

Drag options to blanks, or click blank then click option'

A"123"

B123

CuserId

Did

Attempts:

3 left

💡 Hint

Common Mistakes

Using an unquoted number for the ID causes errors.

The user ID must be a string in quotes in GraphQL queries.

2fill in blank

medium

Complete the code to request posts with their titles and authors.

GraphQL

query { posts { title [1] { name } } }

Drag options to blanks, or click blank then click option'

Aauthor

Bwriter

CauthorName

Duser

Attempts:

3 left

💡 Hint

Common Mistakes

Using incorrect field names causes no data to return.

The field to get the author of a post is usually called 'author'.

3fill in blank

hard

Fix the error in the query to avoid requesting too much data.

GraphQL

query { users { id name [1] } }

Drag options to blanks, or click blank then click option'

AallPosts { title }

Bposts { title content comments { text } }

Cposts

Dposts { title }

Attempts:

3 left

💡 Hint

Common Mistakes

Requesting full post content and comments causes slow queries.

Requesting only the post titles reduces data size and improves performance.

4fill in blank

hard

Fill both blanks to limit query results and improve performance.

GraphQL

query { posts(limit: [1]) { title author { name } [2] } }

Drag options to blanks, or click blank then click option'

A5

B10

Ccomments { text }

Dlikes

Attempts:

3 left

💡 Hint

Common Mistakes

Not limiting results or requesting too many nested fields slows queries.

Limiting posts to 5 and requesting only comments text helps keep queries fast.

5fill in blank

hard

Fill all three blanks to create an efficient query with filters.

GraphQL

query { posts(filter: { authorId: [1], published: [2] }) { title [3] } }

Drag options to blanks, or click blank then click option'

A"123"

Btrue

Ccomments { text }

Dfalse

Attempts:

3 left

💡 Hint

Common Mistakes

Using unquoted IDs or requesting unnecessary fields causes slow queries.

Filtering posts by author ID and published status, and requesting comments text, keeps queries focused and efficient.