Question:
Consider the following Python declarations of two lists.
\[
A = [1, 2, 3] \quad \text{and} \quad B = [4, 5, 6].
\]
Which one of the following statements results in \( A = [1, 2, 3, 4, 5, 6] \)?
Consider the following Python declarations of two lists.
\[ A = [1, 2, 3] \quad \text{and} \quad B = [4, 5, 6]. \] Which one of the following statements results in \( A = [1, 2, 3, 4, 5, 6] \)?
\[ A = [1, 2, 3] \quad \text{and} \quad B = [4, 5, 6]. \] Which one of the following statements results in \( A = [1, 2, 3, 4, 5, 6] \)?
Show Hint
In Python, `extend()` adds all elements of one list to another, while `append()` adds the list as a single element.
Updated On: Apr 4, 2025
- A.extend(B)
- A.append(B)
- A.update(B)
- A.insert(B)
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The Correct Option is A
Solution and Explanation
In Python, the `extend()` method is used to append all the elements of a list to another list. Let's examine each option:
Option (A): `A.extend(B)` will add all elements of list \( B \) to list \( A \), resulting in \( A = [1, 2, 3, 4, 5, 6] \). This is the correct answer.
Option (B): `A.append(B)` will add list \( B \) as a single element to list \( A \), resulting in \( A = [1, 2, 3, [4, 5, 6]] \), which is incorrect.
Option (C): There is no `update()` method for lists in Python, so this is incorrect.
Option (D): `A.insert(B)` is used to insert an element at a specific index, and it cannot be used with an entire list like \( B \). This is also incorrect.
Thus, the correct answer is Option (A), which uses `A.extend(B)`.
Option (A): `A.extend(B)` will add all elements of list \( B \) to list \( A \), resulting in \( A = [1, 2, 3, 4, 5, 6] \). This is the correct answer.
Option (B): `A.append(B)` will add list \( B \) as a single element to list \( A \), resulting in \( A = [1, 2, 3, [4, 5, 6]] \), which is incorrect.
Option (C): There is no `update()` method for lists in Python, so this is incorrect.
Option (D): `A.insert(B)` is used to insert an element at a specific index, and it cannot be used with an entire list like \( B \). This is also incorrect.
Thus, the correct answer is Option (A), which uses `A.extend(B)`.
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