According to boolean algebra here two cases are possible :

Case 1 : if we consider the ‘+’ as the OR operator then the result would be 1(true) as 1 is equivalent to True signal in boolean algebra . It follows the rule that if we are performing OR operation , then if any one of the value is 1 ( true ) then the result would be true.

Case 2: if we consider the ‘+’ as boolean arithmetic operator i.e we are performing the addition of bits then the result would be 0(zero)