Hi,

Only full-time work experience after graduation is considered for CAT application. You must have documents to show your professional full-time work experience. However, you don't need to focus so much on the work experience as it gets very small weightage in the final merit list. First, score a high percentile in CAT exam. Only after that, you will be shortlisted for the selection rounds - GD, PI and WAT. Although you need to perform well in all the rounds, PI and CAT score get maximum importance/weightage in the final merit. Know more about the complete CAT selection process here - CAT Selection Procedure 2018

All the best.