The PCS prelims, hit by large-scale protests at the beginning, were concluded on Sunday, with only about 42 per cent of the candidates appearing. Uttar Pradesh Public Service Commission (UPPSC) Secretary Ashok Kumar said the exams were conducted peacefully under the watch of police and other agencies. "The PCS Pre exam was completed peacefully on Sunday. For the fairness of the exam, a double-layer system was put in place in which the police and the agency were conducting separate investigations," he told PTI. He said all exams were conducted under the watch of CCTV and live streamed and candidates' iris and other biometrics were screened to filter out proxies. "Every candidate of every centre was monitored from the control room set up in the commission. This monitoring was done through CCTV cameras installed in 1,331 centres across the state. As soon as any candidate was seen roaming around, we immediately alerted the concerned centre about what the particular candidate was doing,