What do you mean by GATE? Is it an online exam?

The Graduate Aptitude Test in Engineering (GATE) is a national level online examination that primarily tests the comprehensive understanding of various undergraduate subjects in engineering and science. It generally takes place in the month of January (ending) or February (starting). GATE is conducted jointly by the Indian Institute of Science and seven Indian Institute of Technologies on behalf of the National Coordination Board – GATE, Department of Higher Education, Ministry of Human Resources Development (MHRD), Government of India.The GATE score of a candidate reflects the relative performance level of a candidate. The score is used for admissions to various post-graduate education programs (e.g. Master of Engineering, Master of Technology, Doctor of Philosophy) in Indian higher education institutes, with financial assistance provided by MHRD and other government agencies. Recently, GATE scores are also being used by several Indian public sector undertakings (i.e., government-owned companies) for recruiting graduate engineers in entry-level positions. It is one of the most competitive examinations in India. GATE is also recognized by various institutes outside India, such as Nanyang Technological University in Singapore.

GATE eligibility criteria (as of 2018) -
1) If you are a Indian National or belong to Bangladesh, Ethiopia, Nepal, Singapore, Sri Lanka and the United Arab Emirates you are eligible apply.
2) No age limit for candidates to appear in GATE.
3) You should complete your final year of the Bachelor’s degree in Engineering/Technology or Postgraduate degree in any relevant science subject to apply in GATE.
4) If you appearing in the final year you are also eligible to apply.
5) There is no minimum pass percentage of marks required of the qualifying exam/equivalent to apply for GATE.