Are you familiar with APIs, and do you have experience working with them in the programs you write?
This is an example of an operational question. Operational questions help the interviewer understand the processes you use to do your job and the specific techniques you employ to accomplish your assigned projects. The best way to responded to operational questions is directly and briefly. The interviewer will ask you a follow-up question if they need more information or are particularly interested in this topic. As an experienced application developer, you should be very familiar with APIs and easily answer this question.
"APIs are important parts of any application. They enable the application to integrate with other programs to communicate with and exchange data between the applications. APIs are also used to connect applications to hardware, such as input and output devices, including tablets, printers, and other hardware. Some of the APIs I have worked with communicate with HP printers, Oracle databases, SAP, Google, and many other popular programs and platforms. I also create APIs for the applications that I write and make them available to other developers."
