React Magic Quiz

Test your knowledge of React by answering this quiz!
Question 1 of 1

You are building a user dashboard in a React single page app (SPA) that contains multiple lists showing data from different data sources. You noticed that the page loads slowly, and has a tendency to freeze during data changes and interactions. Which of the following steps would be the LEAST likely to debug the performance issues?


  • Check the code for duplicate components that do not have a key prop, as this could cause React to re-render the component unnecessarily when the page data changes.
  • Implement the useMemo hook to prevent constantly recomputing complex calculations.
  • Change the CSS styling of the components to minimize any complex computations for the browser.
  • Turn on the Highlight updates when components render. option in React Developer Tools and interact with the page to see what's getting re-rendered frequently.
  • Check the code for any data fetching calls that might be happening more often than necessary, such as in a loop.
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