NumPy and Pandas Quiz

What is NumPy?

• A plotting library

• A machine learning framework

• A scientific computing library

• A web development framework

How can you create a NumPy array from a Python list?

• np.array(list)

• numpy(list)

• array(list)

• create.array(list)

What is the shape of a 1D NumPy array with 5 elements?

• (1, 5)

• (5,)

• (5, 1)

• (1,)

How can you access the element at the second row and third column of a 2D NumPy array arr?

• arr[1, 2]

• arr[2, 3]

• arr[1][2]

• arr[2][3]

What does the np.zeros((3, 4)) function in NumPy do?

• Creates an array with ones

• Creates an array with random values

• Creates an array with zeros

• Creates an identity matrix

How can you perform element-wise multiplication of two NumPy arrays a and b?

• a * b

• np.multiply(a, b)

• np.mult(a, b)

• a.dot(b)

What does the np.arange(5, 15, 2) function in NumPy do?

• Creates an array with values from 5 to 15

• Creates an array with values from 5 to 14 with a step of 2

• Creates an array with values from 5 to 15 with a step of 2

• Creates an array with values from 5 to 14

How can you find the mean of a NumPy array arr?

• arr.mean()

• np.mean(arr)

• mean(arr)

• arr.average()

What is the purpose of the np.reshape() function in NumPy?

• Changes the shape of an array

• Transposes the array

• Rotates the array

• Inverts the array

What is the correct way to calculate the dot product of two NumPy arrays a and b?

• dot_product = a x b

• dot_product = np.dot(a, b)

• dot_product = a.dot(b)

• dot_product = np.cross(a, b)