To become Judge in India there are two processes. First is to become a Civil Judge grade-II through qualifying exam, conducted by respective high courts. They invite applications based on their vacancies and conduct exams in multiple centers. The Judges so selected are given Magistrate posts who upon seniority, rise to become civil judge, judicial judge and senior judges. Second process is by selection of senior advocates by the Collegium of Judges. In this process, senior advocates with good reputation are selected without any exams.
After becoming Judge, a person rises from lower courts to high courts and Supreme court based on seniority, reputation and other parameters like cases solved per month/year etc.