Section 3A: Collect and process data using lists

Which of the following is the correct way to create a list containing the numbers 1, 2, and 3 in Python?

• list = 1, 2, 3

• list = [1, 2, 3]

• list = (1, 2, 3)

• list = {1, 2, 3}

Which of the following Python lists best represents a vector of three dimensions?

• [5]

• [2, 4, 6]

• [1, 2]

• [7, 8, 9, 10]

Given two vectors in Python, `a = [1, 2, 3]` and `b = [4, 5, 6]`, which code correctly creates a new vector `c` that is the concatenation of `a` and `b`?

• c = a + b

• c = a * b

• c = a - b

• c = a / b

What does the following code output? ```python numbers = [10, 20, 30, 40] print(numbers[2]) ```

• 10

• 20

• 30

• 40

Which function is used to determine the number of elements in a list (vector) in Python?

• count()

• size()

• len()

• length()

Given the list `fruits = ['apple', 'banana', 'cherry', 'date']`, what is the result of `fruits[1:3]`?

• ['banana', 'cherry']

• ['apple', 'banana']

• ['cherry', 'date']

• ['banana', 'cherry', 'date']

If `my_vector = [5, 10, 15, 20, 25]`, which of the following expressions returns the last two elements?

• my_vector[3:5]

• my_vector[-2:]

• my_vector[2:4]

• my_vector[:2]

Suppose you have a vector `data = [2, 4, 6, 8, 10]`. What will `len(data)` return?

• 4

• 5

• 6

• 10

Given two vectors, `v1 = [1, 2, 3]` and `v2 = [4, 5, 6]`, which code will output the sum of the first elements of both vectors?

• print(v1[0] + v2[0])

• print(v1[1] + v2[1])

• print(v1[2] + v2[2])

• print(v1[0] + v2[2])

A student wants to extract every second element from the vector `data = [0, 1, 2, 3, 4, 5, 6, 7]` starting from the first element. Which slicing expression should they use?

• data[1::2]

• data[::2]

• data[2::2]

• data[::1]