Which method removes the last inserted key-value pair from a dictionary?

Which method removes the last inserted key-value pair from a dictionary?

• A. removeitem()
• B. pop()
• C. popitem()
• D. delitem()

Answer: (C)

The method that removes the last inserted key-value pair from a dictionary is `popitem()`. This method is specifically designed to return and remove the last key-value pair from the dictionary, which is useful when you need to manage the elements in the dictionary in a last-in, first-out manner. `popitem()` is particularly handy because it directly reflects the behavior of dictionaries, which in Python 3.7 and later maintain insertion order. Therefore, using `popitem()` will guarantee that the last key-value pair inserted into the dictionary is the one that gets removed. In contrast, the other options provided do not serve this specific purpose. For example, `removeitem()` and `delitem()` are not standard Python dictionary methods, so they would not provide the functionality described in the question. Meanwhile, `pop()` serves to remove a key-value pair by specifying the key you want to remove, which does not achieve the objective of removing the last inserted pair.

The method that removes the last inserted key-value pair from a dictionary is popitem(). This method is specifically designed to return and remove the last key-value pair from the dictionary, which is useful when you need to manage the elements in the dictionary in a last-in, first-out manner.

popitem() is particularly handy because it directly reflects the behavior of dictionaries, which in Python 3.7 and later maintain insertion order. Therefore, using popitem() will guarantee that the last key-value pair inserted into the dictionary is the one that gets removed.

In contrast, the other options provided do not serve this specific purpose. For example, removeitem() and delitem() are not standard Python dictionary methods, so they would not provide the functionality described in the question. Meanwhile, pop() serves to remove a key-value pair by specifying the key you want to remove, which does not achieve the objective of removing the last inserted pair.