Question

What will the following code display? numbers1 = [1, 2, 3] numbers2 = [10, 20, 30] numbers2 += numbers1 print(numbers1) print(numbers2)

Answer 1

The code appends the contents of numbers1 to numbers2 using the += operator and then prints both lists, resulting in numbers1 remaining unchanged and numbers2 containing the elements of both lists.

Step-by-step explanation:

When the following code is executed:

numbers1 = [1, 2, 3]
numbers2 = [10, 20, 30]
numbers2 += numbers1
print(numbers1)
print(numbers2)

The output will be:

[1, 2, 3]
[10, 20, 30, 1, 2, 3]

The += operator is used to extend the list numbers2 by appending elements from list numbers1 to it. The print() function is then called to display the contents of each list. As such, the original list numbers1 remains unchanged, while list numbers2 has the elements of list numbers1 appended to it.