Hey as The Indian Space Research Organisation, is the space agency of the Indian government headquartered in the city of Bengaluru

Nationality
Candidate should be Indian

Qualification required
Candidate must have done graduation from the recognized university to be eligible for this course.

Candidate must have master’s degree from the in library science / library and information science with at least 60 % aggregate from the recognized university to be eligible for this course.

Age limit
Candidate must not be more than 35 years of age to be eligible for this course.

Here I am giving you some tips to crack exam
Self-control :
On seeing this you may feel it's ridiculous but certainly it plays vital role in your success, you need to be stable both physically and mentally,

Plan to perfection:
Planning is the key, not many would like to put some extra effort for this exam particularly when they are busy in preparing for GATE,

Forcast & prediction :

There must be direction for your preparation, solidity and only way to gain it is to refer to previous paper

Implement it effectively :
Solving those papers may not be tough for those, who are not yet done with their studies