AP CSP - Python Lists and Arrays

What is the difference between a list and an array in Python?

• A list and an array are the same thing in Python.

• A list can only hold elements of the same type, while an array can hold elements of different types.

• Arrays are built-in data structures in Python, while lists are implemented using the NumPy library.

• A list is a built-in data structure in Python that can hold multiple values of different types, while an array is typically implemented using the NumPy library and is used for numerical computations. Arrays are fixed in size and can only hold elements of the same type.

How do you create an empty list in Python?

• []

• [False]

• [None]

• [0]

What is the index of the first element in a list?

• 0

• 1

• -1

• null

How do you access the last element in a list?

• list[1]

• list[-1]

• list[0]

• list[-2]

What is the purpose of the append() method in Python lists?

• To access an element at a specific index in a list.

• To remove an element from a list.

• To add an element to the end of a list.

• To sort the elements in a list.

How do you remove an element from a list in Python?

• remove() or del

• index()

• clear()

• pop()

What is the difference between the extend() and append() methods in Python lists?

• The extend() method appends elements from an iterable to the list, while the append() method adds a single element to the list.

• The extend() method adds a single element to the list, while the append() method appends elements from an iterable to the list.

• The extend() method is used to add elements to the beginning of the list, while the append() method adds elements to the end of the list.

• The extend() method is used to concatenate two lists, while the append() method is used to remove elements from a list.

How do you check if an element exists in a list in Python?

• Use the 'contains' keyword.

• Use the 'exists' keyword.

• Use the 'has' keyword.

• Use the 'in' keyword.

What is the output of the following code? my_list = [1, 2, 3] print(my_list[1:3])

• [1, 2]

• [1, 2, 3]

• [3]

• [2, 3]

What is the output of the following code? my_list = [1, 2, 3] my_list[1] = 4 print(my_list)

• [1, 2, 4]

• [1, 3, 4]

• [1, 2, 3, 4]

• [1, 4, 3]