Most of the government exams are a two-stage process: a written exam followed by an interview. So no matter which exam you are preparing for make sure you are firstly aware of the number of stages and their respective syllabus and that you are preparing for them simultaneously. Do not just prepare for the first stage and then wait for the results then start with the second stage preparation. Before you know it may be too late for the preparation. Thus, prepare for all the stages and keep yourself ready for the exam as a whole.

As soon as the first stage is over you must start focusing on the second one and so on. For the interview too you must get guidance from experts and take some mock interviews so that you are prepared well and nothing comes as a shock to you.