Why subscriptions enable real-time data in GraphQL - Test Your Understanding

Practice - 5 Tasks

1fill in blank

easy

Complete the code to define a subscription that listens for new messages.

GraphQL

subscription { [1] newMessage { id content } }

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

Aon

Badded

Clisten

Dsubscribe

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'added' instead of 'on' causes syntax errors.

Using 'subscribe' or 'listen' are not valid GraphQL keywords here.

The keyword on is used to specify the event to listen to in a subscription.

2fill in blank

medium

Complete the subscription to receive real-time updates for user status changes.

GraphQL

subscription { [1] userStatusChanged { userId status } }

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

Alisten

Bwatch

Ctrigger

Don

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'trigger' or 'watch' are not valid GraphQL subscription syntax.

Forgetting the keyword causes syntax errors.

The on keyword is used to specify the event in a subscription.

3fill in blank

hard

Fix the error in the subscription to correctly listen for new comments.

GraphQL

subscription { [1] newComments { id text author } }

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

Alisten

Bwatch

Con

Dsubscribe

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'subscribe' instead of 'on' causes syntax errors.

Using 'listen' or 'watch' are not valid GraphQL keywords here.

The correct keyword to specify the event in a subscription is on.

4fill in blank

hard

Fill both blanks to complete the subscription that listens for order updates with id and status fields.

GraphQL

[1] { [2] orderUpdated { id status } }

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

Aon

Bsubscription

Cquery

Dmutation

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'query' or 'mutation' instead of 'subscription' for the operation.

Using 'query' or 'mutation' inside the subscription block.

The subscription operation starts with the keyword subscription, and inside it, the event is specified with on.

5fill in blank

hard

Fill both blanks to complete the subscription that listens for chat messages with id, text, and sender fields.

GraphQL

[1] { [2] chatMessageReceived { id text sender } }

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

Asubscription

Bon

Cquery

Dmutation

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'query' or 'mutation' instead of 'subscription' for the operation.

Omitting the 'on' keyword inside the subscription.

The subscription operation starts with subscription, the event uses on.