Computer and information systems (CIS) managers coordinate and direct computer-related activities for companies or organizations. They may go by one of several titles, each with different responsibilities. For example a chief information officer (CIO) oversees an entity’s entire technology strategy. A chief technology officer (CTO) evaluates new technology to determine how it can benefit an organization. An information technology (IT) director manages an IT department. An IT security manager is responsible for network and data security.
Coming to the internship levels for the System manager, 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 this computer courses.