Low Level System Design [An interview perspective]

Software Engineering interviews focus on the coding and software designing skills in an interview. These are fondly known as Algorithm and Design rounds respectively. The Algorithms round check the raw coding skills of a candidate, by the application of Data Structures and Algorithms mostly practiced in school, while the Design round tests the System design skills, which can be High Level Design [HLD] or Low Level Design [LLD].

Low Level Design is also known as Object Oriented Design [OOD] or Object Oriented Analysis and Design [OOAD]. From interns to Senior Software Engineers, top companies dedicate at least one round in the entire interview process for system design. For candidates having less than 3 years’ of experience, Low Level Design plays the most crucial role because these candidates are inexperienced, hence not supposed to have knowledge of High Level Design. Candidates having experience of more than 3 years usually face the system design interviews with a mix of both HLD and LLD.

This course Low Level System Design focuses on the low level aspects of the design. The only way to get better at interviews is by practicing lots of similar problems. In this course, based upon my research, a list of most frequently asked questions in interviews is compiled. Not only is this useful for the interviews, but also for general problem solving and application design.