Tidalwave Solutions Interview Questions, Process, and Tips

Real DOM updates the entire tree when a change is made, while Virtual DOM updates only the specific elements that have changed.

• Real DOM updates are slower compared to Virtual DOM updates.

• Virtual DOM helps in improving performance by reducing the number of updates needed.

• Virtual DOM is a lightweight copy of the Real DOM, which is used to minimize direct interaction with the Real DOM.

Improving browser performance can be achieved through various techniques and optimizations.

• Optimize images and videos to reduce file sizes

• Minify and compress CSS, JavaScript, and HTML files

• Utilize browser caching to reduce loading times

• Reduce the number of HTTP requests by combining files

• Use asynchronous loading for scripts and stylesheets

A diffing algorithm compares two sets of data to identify the differences between them.

• Use algorithms like LCS (Longest Common Subsequence) or Myers diff algorithm for efficient comparison.

• Consider factors like time complexity and space complexity when choosing a diffing algorithm.

• Implementing a visual diff tool can help users easily see the changes between two versions of a file.

useMemo is used to memoize a value, while useCallback is used to memoize a function.

• useMemo is used to memoize a value and recompute it only when its dependencies change.

• useCallback is used to memoize a function and recompute it only when its dependencies change.

• useMemo is useful for optimizing performance by avoiding unnecessary re-renders.

• useCallback is useful for optimizing performance by avoiding unnecessary functi...read more

Improving backend performance involves optimizing code, database queries, and server configurations.

• Optimize database queries by using indexes, avoiding unnecessary joins, and caching results.

• Use caching mechanisms like Redis or Memcached to store frequently accessed data.

• Implement asynchronous processing for time-consuming tasks to improve response times.

• Scale horizontally by adding more servers or using load balancer...read more