NumPy and Pandas Quiz

What function is used to create an array in NumPy?

• np.list()

• np.array()

• np.create()

• np.make()

How can you create a 1D array with values from 0 to 9?

• np.arange(10)

• np.linspace(0, 10, 1)

• np.zeros(10)

• np.ones(10)

What does np.zeros((3, 3)) do?

• Creates a 1D array of zeros

• Creates a 3x3 matrix of ones

• Creates a 3x3 matrix of zeros

• Returns an error

What is the default datatype for NumPy arrays?

• int

• float

• bool

• str

What will np.array([1, 2, 3]) + np.array([4, 5, 6]) return?

• [5, 7, 9]

• [14, 25, 36]

• [[1, 4], [2, 5], [3, 6]]

• Error

What does np.mean() compute?

• Median

• Mean

• Mode

• Variance

How do you reshape a 1D array arr of size 12 into a 3x4 array?

• arr.reshape(3, 4)

• arr.reshape(4, 3)

• arr.resize(3, 4)

• arr.reshape(2, 6)

What does np.random.rand(3, 3) generate?

• A 3x3 matrix of random integers

• A 3x3 matrix of random floats in [0, 1)

• A 3x3 matrix of zeros

• A 3x3 matrix of ones

What does the following code output: np.array([[1, 2], [3, 4]]) * 2?

• [[2, 4], [6, 8]]

• [[1, 2], [3, 4], [1, 2], [3, 4]]

• Error

• [[3, 6], [5, 8]]

Which function reads a CSV file into a DataFrame?

• pd.read_csv()

• pd.read_file()

• pd.read_table()

• pd.load_csv()