The major focus of this study was on the relationship of students' perception of assessment, their exam prep strategies and their achievement (CGPA). The study was correlational, and the survey method was used to find out the research problem. All the public sector universities of Punjab were considered as a population of the study, and only seven (07) public sector universities were taken as a sample. A total number of 1324 students were selected through a simple random sampling technique for the data collection. Two questionnaires, one for students' perception of assessment and the other for students' exam prep strategies, were adapted to collect the data. The collected data were analyzed through mean scores, standard deviation, correlation and t-test. The study findings showed students have different perception and the same exam prep strategies and also concluded a significant relationship between students' perception of assessment, their exam prep strategies and achievement. Based on the results, it is recommended that students should be clearly informed about the assessment practices for the improvement of students' learning.