Pregunta de entrevista de Persistent Systems

1. First Technical Round All basic JS, NodeJs question like event loop, OAuth , How JWT works, Asynchronous vs synchronous, Promises Async await , promises types, methods, some basic db question, program for char occurence . ( around 1 hr ) 1. Second Technical Round ( with senior architect and Project Manager ) All above question asked with cross question why this why that and asked deployment process in current project, some performance related questions, 2 DSA program, reduce vs map, why nodejs is synchronous (around 1.5 hr) 3. HR Round - Salary discussion