In Angular, Route Guards are used to control the access of users to certain routes based on defined conditions. They act as gatekeepers, ensuring that users meet specific requirements before navigating to a route.

In Angular, lifecycle hooks are methods that are executed during various stages of a component or directive’s life cycle. These hooks allow developers to run specific code at different points, helping to control behavior, handle data, and manage resources throughout the component’s lifecycle.

NPM is the world's largest software registry. Open-source developers from every continent use NPM to share and borrow packages, and many organizations use NPM to manage private development as well.