Is static is must

Answer 1

V.Karthik
Do U mean that is it compulsory to use static keyword ?
then the answer is NO .
it depends on requirements of program & mind of programmer ☺

//have a look at this post ,on how to make your question more clear :
https://www.sololearn.com/Discuss/1316935/?ref=app

Answer 2

No but it is a strong keyword