Mastering Python Lists

What is a list in Python?

• A list in Python is a fixed-size array of integers.

• A list in Python is a mutable, ordered collection of items defined by square brackets.

• A list in Python is an immutable collection of items.

• A list in Python is a collection of items defined by curly braces.

How do you create a list in Python?

• You create a list in Python using curly braces, e.g., my_list = {1, 2, 3}.

• You create a list in Python using square brackets, e.g., my_list = [1, 2, 3].

• You create a list in Python by using the list() function without any arguments.

• You create a list in Python using parentheses, e.g., my_list = (1, 2, 3).

What is the syntax to access the first element of a list?

• list(1)

• list[0]

• list{0}

• list.first()

How can you add an element to the end of a list?

• Use the insert() method at the beginning of the list.

• Use the extend() method to add multiple elements at once.

• Use the add() method to append an element to the list.

• Use the append() method on the list.

What method would you use to remove an item from a list?

• Use the 'clear()' method.

• Use the 'remove()' or 'pop()' method.

• Use the 'insert()' method.

• Use the 'add()' method.

How do you find the length of a list?

• Access the first element to determine the length.

• Use the 'size()' function.

• Count the number of elements manually.

• Use the 'len()' function.

What is the difference between append() and extend()?

• append() can only be used with lists; extend() can be used with any iterable.

• append() adds one item; extend() adds multiple items.

• append() modifies the original list; extend() creates a new list.

• append() adds items at the beginning; extend() adds items at the end.

How can you sort a list in Python?

• Use list.sort() or sorted(list).

• Use list.remove() to sort a list.

• Use list.reverse() to sort a list.

• Use list.append() to sort a list.

What will be the output of the following code: list1 = [1, 2, 3]; print(list1[1:3])?

• [2, 3]

• [1, 2]

• [1, 2, 3]

• [3]

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

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

• Use 'item.exists()' to verify presence in the list.

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

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