Moris Media Senior Front end Developer Interview Questions, Process, and Tips

I handle cross-browser compatibility by testing on multiple browsers, using polyfills, and CSS resets.

• Test on multiple browsers to identify and fix issues

• Use polyfills to provide missing functionality in older browsers

• Utilize CSS resets to ensure consistent styling across browsers

• Example: Had to fix layout issues in Internet Explorer by adjusting CSS properties

Optimizing web application performance involves various strategies like minification, caching, lazy loading, and image optimization.

• Minify CSS, JavaScript, and HTML files to reduce file sizes and improve load times.

• Implement browser caching to store static resources locally and reduce server requests.

• Utilize lazy loading to defer loading of non-essential resources until they are needed.

• Optimize images by resizing, comp...read more

Integrated complex front-end features with a back-end system in a challenging project.

• Developed a real-time chat feature using WebSockets to communicate with the back-end server

• Faced challenges with data synchronization and ensuring seamless updates across all clients

• Implemented RESTful APIs to fetch and update data from the back-end

• Used Redux for state management to handle complex data flows

• Performed thorough testing

I approach designing for accessibility by following best practices and guidelines to ensure all users can access and use the application.

• I use semantic HTML to provide structure and context for screen readers

• I ensure all interactive elements are keyboard accessible

• I use ARIA attributes to enhance accessibility for users with disabilities

• I conduct usability testing with users who have disabilities to gather feedback and...read more

Key considerations for implementing responsive design include fluid grids, flexible images, media queries, and testing across various devices.

• Use fluid grids to ensure content adapts to different screen sizes

• Utilize flexible images that scale appropriately

• Implement media queries to apply different styles based on screen size

• Test the design across multiple devices to ensure consistent user experience

Refactored a large codebase by breaking it down into smaller modules, improving readability and maintainability.

• Analyzed the existing codebase to identify redundant or inefficient code

• Broke down the code into smaller, more manageable modules

• Implemented design patterns such as MVC or MVVM to improve code structure

• Refactored code incrementally, testing each change to ensure functionality was not affected

• Documented change...read more

I stay updated by following industry blogs, attending conferences, and experimenting with new technologies. I evaluate new technologies based on their benefits, community support, and compatibility with current stack.

• Follow industry blogs and websites like CSS-Tricks, Smashing Magazine, and A List Apart

• Attend conferences and meetups to learn about new technologies and best practices

• Experiment with new technologies by b...read more

State management in complex front-end applications involves using tools like Redux or Context API to centralize and manage application state efficiently.

• Use tools like Redux or Context API to centralize and manage state

• Implement state management patterns like Flux architecture to ensure data flow consistency

• Optimize state updates by using selectors to prevent unnecessary re-renders

• Use middleware like Thunk or Saga for ...read more

Troubleshooting a performance issue in a production environment

• Identified the specific area of the application causing the performance issue

• Reviewed server logs and monitoring tools to gather data on resource usage

• Used profiling tools to analyze code execution and identify bottlenecks

• Optimized code by refactoring, caching, or reducing unnecessary operations

• Implemented performance testing to ensure the issue was resolve

I use Git for version control and collaborate with team members through branches and pull requests.

• Utilize Git for version control to track changes and collaborate with team members

• Create separate branches for different features or bug fixes to prevent conflicts

• Regularly pull changes from the main branch to stay up to date with the latest code

• Resolve code conflicts by communicating with team members and carefully mergi...read more