Practice3_Spring_2024-1

Python for Data Analysis – Practice 3 1. Which of the following is invalid? (D) a. _x = 7 b. __x = 77.1 c. __x__ = 78 d. 1st_x = 1 e. None of the above 2. Which of the following cannot be a variable? (B) a. __init__ b. in c. it d. on e. None of the above 3. What will the code below print? (D) str1 = 'asdfgh' k = 'a' while k in str1: str1 = str1[:-1] print(k, end = ' ') a. (a, s, d, f, g, h) b. a s d f g h c. ‘asdfgh’ d. a a a a a a e. None of the above 4. What is the output of the following? (B) print ( 'xy,78'. isalnum ()) a. True b. False c. 0 d. None of the above

5. What will be the output? my_party = [ 'cake', 'balloons', 'gift', 'drinks' ] my_party. insert (my_party. index ( 'balloons' ), 'confetti' ) print (my_party ) a. [‘cake’, ‘balloons’, ‘gift’, ‘drinks’] b. [‘cake’, ‘confetti’, ‘balloons’, ‘gift’, ‘drinks’] c. [‘cake’, ‘confetti’, ‘gift’, ‘drinks’] d. None of the above 6. What is the output of the following? print ( 'Good*Morning!'. istitle ()) a. Good*Morning! b. False c. True d. None of the above 7. What is the output of the code below? print(‘asdfgh’.replace(‘sg’, ‘77’)) a. asdfgh b. a7df7h c. asd77h d. 77dfgh e. None of the above 8. What will be the output of the code below? for s in ''.join(reversed(list('water'))): print (s, end = ' ') a. w a t e r b. e t a w r c. r e t a w d. None of the above

13.What is the output of the code below? def my_func(l): x = [] for i in l: if i not in x: x.append(i) return x print(my_func([1,2,2,3,3,3,3,4,4,5])) a. [1, 2, 2, 3, 3, 3, 3] b. [1, 2, 3. 4] c. [1, 2, 3, 4, 5] d. None of the above 14. What is the output of the code below? t1 = ('a', 's', 'd', 'f', 'g') s1 = ''. join( t1) print(s1) a. [ ‘a’, ‘s’, ‘d’, ‘f’, ‘g’] b. [‘asdfg’] c. Index Error d. asdfg e. None of the above 15. What is the output of the program below? t1 = (‘1’, 4.0, ‘b’, ‘U45’) t2 = list(t1) t2.remove(‘U45’) print(t2) a. (‘1’, 4.0. ‘b’) b. [‘1’, 4.0, ‘b’, ‘U45’] c. [‘1’, 4.0, ‘b’] d. Index Error e. None of the above

16. What is the output of the code below ? C1 = set() C1. add(‘Red’) C1. update([‘Blue’, ‘Green’]) print( C1) a. (‘Red’, ‘Blue’, ‘Green’) b. [‘Red’, ‘Blue’, ‘Green] c. (‘Blue’, ‘Green’) d. None of the above 17. What is the output of the code below? S1 = set([1, 7, 8, 3]) S2 = set([15, 31, 3]) S3 = S1 & S2 print( S3) S4 = S1 – S3 print( S4) a. { 3 } { 8, 1, 7 } b. ( 15, 31) ( 1, 7, 8) c. { 8, 3 } { 3 } d. None of the above 18.What is this code output? def fn_x():   for j in range(3, 15, 3):   print (j, end=’ ‘) fn_x()  a. 3 6 9 12 b. 3, 6, 9, 12 c. 3 6 9 12 15 d. None of the above

24. What is the output of the program below? G1 = set(['electric', 'cable', 'rent']) G2 = set(['electric', 'cable', 'transportation']) G3= set(['cable', 'clothing', 'entertainment']) G4= G1.intersection(G2).difference(G3) print(G4) a. {‘electric’} b. {‘electric’, ‘cable’} c. {‘clothing’, ‘entertainment’} d. None of the above 25.Suppose you have a datetime string str1 = ‘01/31/2019 10:30AM’ . How would you slice this string in order to get just the time? a. str1[11:16] b. str1[13:18] c. str1[14:] d. str1[-7:] e. None of the above

ANSWERS 1. d 2. b 3. d 4. b 5. b 6. c 7. a 8 . c 9. c 10. b 11. b 12. b 13. c 14. d 15. c 16. d 17. a 18. a 19. d 20 . c 21. b 22. c 23. d 24. a 25. d