ST :
Smoke testing is non-exhaustive software testing, ascertaining that the most crucial functions of a program work, but not bothering with finer details. The term comes
to software testing from a similarly basic type of hardware testing.

UIT :
I did a bit or R n D on this …. some say its nothin but Usability testing. Testing to determine the ease with which a user can learn  to operate, input, and interpret outputs of a system or component.

Smoke tesing is nothing but to check whether basic  functionality of the build is stable or not? i.e if it possess 70% of the functionality we say build is  stable.
User interface testing: We check all the fields whether they are existing or not as per the format we check speelling graphic font sizes everything in the window present or not