React and GraphQL Quiz

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Question 1/15

What is the purpose of the Apollo Link in the context of Apollo Client?

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Question 2/15

In GraphQL, what is the purpose of fragments?

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Question 3/15

What does the term 'optimistic UI update' refer to in the context of Apollo Client?

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Question 4/15

Which HTTP method corresponds to the GraphQL query operation?

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Question 5/15

How does the useQuery hook in Apollo Client manage data fetching in a React application?

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Question 6/15

What is the purpose of the component in Apollo Client?

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Question 7/15

What is the role of resolvers in a GraphQL server?

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Question 8/15

What does JSX stand for in a React application?

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Question 9/15

Which of the following is a benefit of using Apollo Client in a React application?

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Question 10/15

Which React hook is commonly used for executing side effects?

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Question 11/15

What is the main benefit of using GraphQL over REST APIs?

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Question 12/15

Which of the following is a major limitation of Apollo Client?

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Question 13/15

Which command can you use to create a new React application with Create React App?

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Question 14/15

Which concept does React use to pass data down to components as read-only?

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Question 15/15

Which of the following is a key feature of React that enhances performance?

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Question 1/15
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What is the purpose of the Apollo Link in the context of Apollo Client?

Available answers

Apollo Link is a sophisticated mechanism for constructing a pipeline to handle how outgoing GraphQL operations work, including the ability to create middleware for common behaviors.
Question 2/15
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In GraphQL, what is the purpose of fragments?

Available answers

Fragments in GraphQL allow you to reuse query parts in multiple queries to avoid repeating code. They make it easy to ensure consistency and maintainability across similar queries.
Question 3/15
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What does the term 'optimistic UI update' refer to in the context of Apollo Client?

Available answers

Optimistic UI update allows your app to immediately reflect a change assuming it will succeed. This improves user experience by reducing the latency perceived by delaying UI updates until server responses.
Question 4/15
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Which HTTP method corresponds to the GraphQL query operation?

Available answers

GraphQL queries typically use the HTTP GET method. However, they can also be sent over POST requests, especially when dealing with large queries or mutations.
Question 5/15
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How does the useQuery hook in Apollo Client manage data fetching in a React application?

Available answers

The useQuery hook is designed to simplify data fetching in React components. It automatically handles the fetching process, caching, and provides developers with information about the loading and error states.
Question 6/15
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What is the purpose of the <Query> component in Apollo Client?

Available answers

The component in Apollo Client is responsible for allowing developers to execute GraphQL queries from within their React components and bind the results to the UI.
Question 7/15
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What is the role of resolvers in a GraphQL server?

Available answers

Resolvers are responsible for fetching the data for a single field in a type and are essential for fulfilling GraphQL queries.
Question 8/15
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What does JSX stand for in a React application?

Available answers

JSX stands for JavaScript XML. It is a syntax extension for JavaScript used in React to describe what the UI should look like.
Question 9/15
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Which of the following is a benefit of using Apollo Client in a React application?

Available answers

Apollo Client provides benefits such as efficient state management, caching, and simplifying GraphQL interaction in React applications.
Question 10/15
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Which React hook is commonly used for executing side effects?

Available answers

The
useEffect
hook in React is used for running side effects such as data fetching, subscription setting, or manual DOM manipulation.
Question 11/15
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What is the main benefit of using GraphQL over REST APIs?

Available answers

GraphQL allows clients to specify exactly what data they need, reducing over-fetching or under-fetching of data commonly seen in REST APIs. This capability is encapsulated by the query language allowing for more efficient data retrieval.
Question 12/15
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Which of the following is a major limitation of Apollo Client?

Available answers

Apollo Client can struggle with managing large-scale application state without mixing in other state management solutions like Redux.
Question 13/15
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Which command can you use to create a new React application with Create React App?

Available answers

To create a new React application using Create React App, you use the command
npx create-react-app my-app
. This sets up a ready-to-use React project.
Question 14/15
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Which concept does React use to pass data down to components as read-only?

Available answers

Props are the mechanism used by React to pass read-only data from parent to child components.
Question 15/15
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Which of the following is a key feature of React that enhances performance?

Available answers

React uses a virtual DOM to optimize rendering by computing the differences between the current and previous HTML and updating only the parts that have changed.