20. test case on computer

while testing any object in out reail life we should
consider:-
1.Functionality of the object(sanity testing)
2.look and feel (usability testing)
3.performance
4.durability
5.Rigidity

1.Check for the basic functionality:weather pen is writing
on paper or not?
2.how easily we are able to write on paper(length & width
of pen)?
3.weather pen is writing continuesly or not..etc