What is a consensus algorithm, what is its purpose, and can you provide some examples?

This question can be easily recognized as technical since it asks about a specific concept used in this job, its purpose and asks you to provide some examples. When conducting research before an interview, you should try to understand the processes the organization uses to conduct the work you are interviewing for. This will enable you to provide examples that they can relate to and which align with the job. Doing this will set you apart from other people interviewing for this position.