Strobes Interview Questions and Answers

Code for functional component to call API and show list from response

• Use useEffect hook to call API on component mount

• Use useState hook to store API response

• Map through response data to display list

• Handle loading and error states

I would approach the issue by identifying the root cause and collaborating with the team to find a solution.

• Identify the root cause of the issue

• Collaborate with the team to find a solution

• Communicate effectively with all parties involved

• Take ownership of the issue and work towards a resolution

• Document the issue and the steps taken to resolve it

Explanation of React hooks and lifecycle methods

• useMemo is used to memoize expensive computations and avoid unnecessary re-renders

• useCallback is used to memoize functions and avoid unnecessary re-renders of child components

• useEffect is used to perform side effects such as fetching data or updating the DOM

• Lifecycle methods in class components are used to manage component state and perform side effects

• ComponentDidMount is called after the component is mounted and is used to fet...read more

Virtual DOM is a lightweight copy of the actual DOM used for efficient rendering in React.

• Virtual DOM is a JavaScript object that represents the actual DOM.

• It allows React to update only the necessary parts of the UI, improving performance.

• Changes made to the virtual DOM are compared with the previous version to determine what needs to be updated.

• React then updates the actual DOM with the minimum required changes.

• Virtual DOM is created using React.createElement() or JSX.

• React...read more

Code for integrating pagination on scrolling in Reactjs API

• Use Intersection Observer API to detect when the user has scrolled to the bottom of the page

• Fetch the next set of data from the server using an API call

• Update the state with the new data and render it on the page