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CBSE Class 11 Informatics Practices Question 32 of 80

Lists in Python — Question 10

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10
Question

Question 10

Consider the following code:

>>>A = [10, 20, 30, 40]
>>>B = A.copy()
>>>A[2] = 50
>>>B

Which of the following will be the elements of list A and B?

  1. A = [10, 20, 50, 40]
    B = [10, 20, 30, 40]
  2. A = [10, 20, 30, 40]
    B = [10, 20, 50, 40]
  3. A = [10, 20, 30, 40, 50]
    B = [10, 20, 50, 40]
  4. A = [10, 20, 40]
    B = [10, 20, 50, 40]
Answer

A=[10, 20, 50, 40]
B=[10, 20, 30, 40]

Reason — The code initializes list A with elements [10, 20, 30, 40]. It then creates a copy of list A named list B using the copy() method. Subsequently, the third element of list A is modified to 50 using A[2] = 50. At this point, B is still [10, 20, 30, 40], because it's a separate list from A. The copy() method does not modify the original list or the modifications made in the new list will not be reflected to the base list.