Python List Mastery

How do you create an empty list in Python?

• {}

• None()

• []

• list()

What is the syntax to access the third element of a list named 'my_list'?

• my_list[3]

• my_list(3)

• my_list[2]

• my_list(2)

How can you change the second element of a list named 'my_list' to the value 5?

• my_list[2] = 5

• my_list.insert(1, 5)

• my_list[0] = 5

• my_list[1] = 5

What method is used to add an element to the end of a list in Python?

• pop()

• remove()

• insert()

• append()

What is list comprehension in Python?

• List comprehension is a lengthy process to create lists in Python

• List comprehension is a method to create tuples in Python

• List comprehension is a concise way to create lists in Python by using a single line of code.

• List comprehension is a way to create dictionaries in Python

What is the output of the following nested list: [[1, 2, 3], [4, 5, 6], [7, 8, 9]]?

• [[7, 8, 9], [4, 5, 6], [1, 2, 3]]

• [[9, 8, 7], [6, 5, 4], [3, 2, 1]]

• [[1, 4, 7], [2, 5, 8], [3, 6, 9]]

• [[1, 2, 3], [4, 5, 6], [7, 8, 9]]

How do you remove the last element from a list in Python?

• my_list.remove(-1)

• my_list.pop(-1)

• my_list.pop(0)

• my_list.delete(-1)

What is the result of the expression [x*2 for x in range(5)]?

• [0, 1, 2, 3, 4]

• [2, 4, 6, 8, 10]

• [1, 4, 9, 16, 25]

• [0, 2, 4, 6, 8]

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

• The append() method adds multiple elements to the end of the list, while the extend() method adds a single element to the end of the list.

• The append() method removes elements from the list, while the extend() method adds elements to the list.

• The append() method adds a single element to the end of the list, while the extend() method adds multiple elements to the end of the list.

• The append() method adds elements to the beginning of the list, while the extend() method adds elements to the middle of the list.

How do you access the second element of the first list in a nested list named 'my_nested_list'?

• my_nested_list[0,1]

• my_nested_list[0][1]

• my_nested_list[2][1]

• my_nested_list[1][0]