1. Multiple questions on this object like what is this, they asked me find the value of this on from the JS snippets. 2. Flatten a multidimensional array without using inbuilt function. 3. Debounce/Throttling, Closures, Arrow functions & how it is different from normal function, Web worker, Service worker, Webpack, Typescript 4. Difference between px, rem, em and write css for some problem(flex grow/shrink) 4. React all hooks, Redux, React design pattern, improve site security, improve site performance, how to override console log output, pure component, error boundaries 5. Solid principle, Unit testing
