For question like :- Find minimum number of variable required to solve the expression in three address code. (not SSA) Do we need to consider the given variable also? Example:- q + r/3 + s – t * 5 + u * v/w how many variable required?

The number of distinct 1 letter subword present in “NAMITA” is equal to_______________ Answer given subwords are N,A,M,I,T But last ‘A’ is not a subword. Is it correct??