Bengaluru: The Social and Educational Survey, popularly known as the ‘caste census’ in Karnataka, commenced on Monday, with enumerators going door-to-door to collect data. “The survey is underway, we have received reports from various places,” official sources said. However, there were reports of technical glitches and server issues at several places, including Shivamogga, Haveri, Ballari, Chitradurga, Kodagu districts, delaying the survey in some places. At many of these places, surveys continued after problems were solved, sources said. According to officials, the survey, estimated to cost Rs 420 crore, will be conducted “scientifically,” using a 60-question questionnaire prepared for the exercise.