I was asked to take a test on HackerEarth that was ¬15 questions long and dealt with React. After the test, I was asked to create an application using React.
The application wasn't anything too complex and involved fetching and displaying data using a RESTful API. The test does require quite a bit of manipulating the data in order to get it to match the requirements that are given to you.
After the test, I was asked to come for a short interview at the office. The panel is small, and they mostly ask questions about how you'd fit into a team.