Mastering Python Lists

What method is used to add an item to a list in Python?

• push

• add

• insert

• append

How do you remove an item from a list by value?

• Use list.remove(value) to remove an item by value.

• Use del list[value] to remove an item by value.

• Use list.pop(value) to remove an item by value.

• Use list.delete(value) to remove an item by value.

What is the syntax to join two lists in Python?

• list1.merge(list2)

• list1.append(list2)

• list1 * list2

• list1 + list2 or list1.extend(list2)

Explain how to create a copy of a list in Python.

• copied_list = original_list[]

• copied_list = list(original_list)

• You can create a copy of a list in Python using slicing: copied_list = original_list[:].

• copied_list = original_list.copy()

What is the output of the following code: list1 = [1, 2, 3]; list2 = list1.copy(); list2.append(4)?

• [1, 2, 3, 4, 5]

• [1, 2, 3]

• [1, 2, 3, 4]

• [4, 1, 2, 3]

How can you iterate over a list using a for loop?

• for item in my_list:

• my_list.forEach(item => { });

• for each item in my_list:

• for item in range(len(my_list)) :

What is the difference between 'append()' and 'extend()' methods in a list?

• append() adds multiple elements; extend() adds one element.

• append() removes an element; extend() replaces the list.

• append() can only be used with strings; extend() can be used with any data type.

• append() adds one element; extend() adds multiple elements from an iterable.

How do you check if an item exists in a list?

• Use 'item in list' in Python to check for existence.

• Use 'list.contains(item)' in Python.

• Check the length of the list to see if it's greater than zero.

• Iterate through the list and count the items.

What will happen if you try to remove an item that is not in the list?

• An error message is displayed.

• The list is cleared completely.

• The item is added to the list.

• The list remains unchanged.

How can you find the length of a list in Python?

• Get the length by using my_list.size() method.

• Use len(my_list) to get the length of a list.

• Use count(my_list) to find the length.

• my_list.length() gives the length of the list.