Question 16 Which one of the following preprocess directive include both isalpha() and fixed(). Not yet answered Select one: O a iostream Marked out of 1.00 O b. cctype P Flag question O c. cmath O d. None of these Question 17 One of the following is an incorrect variable declaration. Not yet answered Select one: a double b = $50: Marked out of 1.00 b. string str= "123": P Flag question c. char option= '5': d. int_a=5 2; Question 18 Using uninitialized variables in computation leads to one of the following errors. Select one: Not yet answered O a. Linking error Marked out of 1.00 O b. Syntax error Flag question Oc. None of these O d. Runtime error Question 19 Input/Output manipulators like fixed and setprecsision(n) to specify number of cimal places can also be used with cin statement. Select one: Not yet answered O a. False Marked out of 1.00 Ob. True F Flag question CH program initializes the variables automatically to zero. Question 20 Select one: Not yet answered a. False Marked out of 1.00 Ob. True Flag