Lists in python

What is the correct way to access the third element in a list named my_list?

• my_list[3]

• my_list[2]

• my_list[0]

• my_list(2)

Which of the following methods is used to add an element to the end of a list in Python?

• append()

• insert()

• add()

• extend()

Functions that can be used for list operations

• reverse ()

• index()

• sqrt()

• zip()

How do you remove the element at index 2 from a list?

• list.remove[2]

• list.pop[2]

• del list[2]

• None of the above

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

• Adds an element to the end of the list

• Concatenates another list to the end of the list

• Sorts the elements in the list

• Reverses the order of elements in the list

What is the key difference between sort() and sorted() in Python?

• sort() returns a new sorted list, while sorted() sorts the list in-place.

• sort() works only on numeric lists, while sorted() works on any iterable.

• sort() is a function, and sorted() is a method.

• sort() is stable, and sorted() is unstable.

numbers = [1, 2, 3, 4, 5]

result = [x if x % 2 == 0 else x**2 for x in numbers]

print(result)

• [1, 4, 9, 16, 25]

• [1, 2, 3, 4, 5]

• [2, 4, 6, 8, 10]

• [1, 4, 3, 16, 5]

matrix = [[1, 2, 3], [4, 5, 6], [7, 8, 9]]

result = [row[0] for row in matrix].

print(result).

• [1, 2, 3]

• [1, 4, 7]

• [1, 5, 9]

• [3, 6, 9]

word = "python"

result = "".join([char.upper() if i % 2 == 0 else char for i, char in enumerate(word)])

print(result)

• "PyThOn"

• "pYtHoN"

• "PYTHON"

• "pyThOn"

nested_list = [[1, 2, 3], [4, 5, 6], [7, 8, 9]]

result = [sum(row) for row in zip(*nested_list)]

print(result)

• [12, 15, 18]

• [22, 25, 28]

• [15, 18, 21]

• [6, 15, 24]