HTML, CSS, Javascript, React, Redux,.. Questions: 1. SASS and LESS 2. Media Queries, CSS grid layout, Bootstrap and Flexbox 3. Component Interactions in React JS 4. Redux, Redux-Thunk, Redux-Saga, and SPA react-router 5. Restful API and JSON 6. GIT and SVN 7. JEST, Enzyme and react testing library (RTL) 8. Jira Redmine and GitHub 9. Agile and SCRUM 10. JQUERY 11. Node JS and React Router 12. Visual Studio Code, Brackets and Notepad++ .