There is some serious issue with this organization of CDA. previously they did not use to advertise the jobs at all and vacancies were filled secretly by inducting relatives and sifarshies on work charge or as daily wagers who were then regularized later. this time due to increased scrutiny they advertised two times in last 4 years if i am not wrong and both times CDA forgot that the advertisements must be followed by written tests and interview to complete the induction process.