Happiest Minds Technologies Full Stack Software Developer Interview Questions and Answers for Freshers

Find the longest common substring in an array of strings.

• Iterate through each string in the array and compare with all other strings to find common substrings.

• Keep track of the longest common substring found so far.

• Return the longest common substring at the end.

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

• Virtual DOM is a concept where a lightweight copy of the actual DOM is created in memory.

• When changes are made to the UI, React compares the Virtual DOM with the actual DOM to identify the differences.

• React then updates only the necessary parts of the actual DOM, minimizing the number of DOM manipulations for better p...read more

Optimising a React application involves code splitting, lazy loading, using memoization, reducing unnecessary re-renders, and optimizing network requests.

• Implement code splitting to load only necessary code for each route or component.

• Use lazy loading to load components only when they are needed, reducing initial load time.

• Utilize memoization techniques like useMemo and useCallback to prevent unnecessary re-renders.

• Avo...read more