System administrators (or sysadmin or systems administrator) are responsible for the maintenance, configuration, and reliable operation of computer systems and servers. They install hardware and software, and participate in research and development to continuously improve and keep up with the IT business needs of their organization. System administrators also actively resolve problems and issues with computer and server systems to limit work disruptions within the company. Most system administrators start their career by pursuing a degree in computer science, IT, or engineering. In addition, many system administrators choose to get system or technology certifications in order to improve opportunities for advancement. A common progression in the career path of a system administrator is to move on to become a systems engineer and then a systems architect.
Coming to the internship levels for the administrators, he/she can join any company as an intern and work with them for a certain range of months during their study period as the will get an hang on idea about their work.
· Joint Entrance Examination (JEE mains):
This exam is an national level exam to get admitted for the institutes of NIT's, IIIT's and all other colleges too.. as to get admitted for the Btech computer science engineering courses. This exam is widespread and each student must prepare hard from Class 11 with science course till their examinations.
· Joint Entrance Examination advanced (JEE advanced):
This exam is also conducted to get admission for Btech Computer science courses but to join only for IIT’s. This exam can be attempted only if the candidate clears JEE mains exam.
· Gradual Aptitude Test in Engineering (GATE) Exam:
The Graduate Aptitude Test in Engineering is an examination conducted in India that primarily tests the comprehensive understanding of various undergraduate subjects in engineering and science for admission into the Masters Program and Job in Public Sector Companies.
These are the 3 main exams and also other State level entrance exams are also conducted to secure admission for these computer science courses.
https://manipal.edu/mit/program-list/btech/btech-computer-science-engineering.html
etc. and many colleges in India offer computer science courses.