How to call the callback function of an adjacent React component?

Question

React

There is a parent component, it has two child components. How to implement a function call in child component No. 2 when an event is triggered in child component No. 2
There is a component with questions for the test, as well as a component of the last results. It is necessary that at the end of the timer countdown in the test component, the component with the results is updated.

Answer 1

Remove logic from components, move it to the parent and manage props

Answer 2