BTech : NIT
Company : Samsung Delhi
Gross Salary: 12 LPA
Sign-on bonus : 1L
Retention Bonus : 2.5L to be distributed over a period of 3 year
CTC : 15.5 LPA

I am not sure wheter to accept this or reject , I have another offer from service based company. (8LPA) , The hr told me that there will be a test which i need to clear within 6 months of joining . Anyone can tell what if we ar not able to clear the test after multiple attempts because i am not that good at advance topics like graph, dp and all . so should i go for it or what. ??? please someone help me