PCAP 31 03 PCAP Certified Associate Python Programmer · Free Practice Question Medium
Question 23
Q535 - Control Flow
What is the expected output of the following code?
- data = [1, 2, [3, 4], [5, 6], 7, [8, 9]]
- count = 0
- for i in range(len(data)):
- if type(data[i]) == list:
- count += 1
- print(count)
-
A
3 -
B
The code is erroneous.
-
C
6 -
D
9
Reveal correct answer
Correct answer: A
Explanation
Topics: list for range() len() if type() equal to operator
Try it yourself:
- data = [1, 2, [3, 4], [5, 6], 7, [8, 9]]
- count = 0
- for i in range(len(data)):
- if type(data[i]) == list:
- count += 1
- print(count) # 3
Explanation:
The snippet checks every element of the list, if it itself is a list
and counts the occurrences.
There are three lists inside of the list data: [3, 4], [5, 6] and [8, 9]
Q535 (Please refer to this number, if you want to write me about this question.)
A. The code iterates through the elements in the 'data' list and checks if the element is a list. If it is, the 'count' variable is incremented by 1. There are a total of 3 lists in the 'data' list, so the final output will be 3.
B. This choice is incorrect as the code is not erroneous. It correctly counts the number of lists within the 'data' list and outputs the count. The code is structured to handle the list elements and increment the count accordingly.
C. This choice is incorrect because the code is counting the number of lists within the 'data' list, not the total number of elements. The code only increments the count when it encounters a list, so the output will not be 6.
D. This choice is incorrect because it assumes that the code counts all the elements in the 'data' list, which is not the case. The code specifically counts the number of lists within the 'data' list, not the total number of elements, so the output will not be 9.
Discussion
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