Siemens Interview Question

ANgular: How to comunicate between two components,Need to write logic for Http Interceptor, write logic to Pipes, Observable, Subject, Behaviour Subject, RXJS C#: Write code of given array and print with right rotation with given number. //rotate([1,2,3,4] , 2); // 3,4,1,2 How to access file and write file in multithreading, While update and write file at same time, What points we need to take care