PYTHON IMPORTANT QUESTIONS FOR FINAL EXAM

 Important Questions For Final Exam 

Question 1.

def both_start_with(s1, s2, prefix)

'''(str, str, str) -> bool

Return True if and only if s1 and s2 both start with the letters in prefix. ''' if s1.startswith(prefix) and s2.startswith(prefix): return True else:

return False The function works, but the if statement can be replaced with a single return statement:

return # CODE MISSING HERE Write the missing expression. Use only the parameters, two calls on method startswith, and operator and.

Do not use unnecessary parentheses: you need them for the method calls, but nothing else. Do not include the word return; just write the expression.

Question 2.

def gather_every_nth(L, n): '''(list, int) -> list

Return a new list containing every n'th element in L, starting at index 0.

Precondition: n >= 1

>>> gather_every_nth([0, 1, 2, 3, 4, 5], 3) [0, 3] >>> gather_every_nth(['a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i'], 2) ['a', 'c', 'e', 'g', 'i'] '''

result = [] i = 0 while i < len(L): result.append(L[i]) i = # CODE MISSING HERE

return result

MORE QUESTIONS AND THEIR ANSWERS WOULD BE POSTED ASAP, BE UPDATED!!