Data Analytics using Python - Quiz 2

What is the output of: np.left_shift(5, 2)

• 10.0
• 20.0
• 18.0
• 300.0

What is the output of : np.bitwise_and(10, 18)

• 18.0
• 10.0
• 2.0

What is the syntax to get the variance?

• np.var
• np.variance
• np.arr.variance
• arr.variance

What is the syntax to get the median?

• np.median
• arr.mean
• mean()
• np(arr.mean)

What will be the output of the following code:

a=np.array([[8,5,1],[6,2,7]])

print(np.sort(a))

• [[8 5 1] [6 2 7]]] [2 6 7]]

• [[1 5 8] [2 6 7]]

• Error

• [[8 5 1] [7 6 2]]

What is Pandas ?

• A Giant Fuzzy Bear

• Python library to perfom data operations

• Python library to manipulate datasets

• None of the Above

What will be the output of the following code: np.matlib.identity(5, dtype = float)

• [[1. 1.] [1. 1.]]

• error

• [[0. 0.] [0. 0.]]

• [[1. 0. 0. 0. 0.] [0. 1. 0. 0. 0.] [0. 0. 1. 0. 0.] [0. 0. 0. 1. 0.] [0. 0. 0. 0. 1.]]

What is the output to create a 2D array of size (2, 3) with random numbers?

• np.matlib.rand(3,2)

• rand(3,3)

• np.matlib.rand(2,3)

• matlib.rand(3,3)

What will be the output of the code:

arr = np.array([[20,25,30,35], [40,50,60,70], [45,48,51,54]])

arr.flatten()

• plt.histogram

• plt.hist

• np.his

• np.hist

What is the syntax to plot horizontal bar?

• plt.barhor
• plt.horzbar
• plt.horizontal
• plt.barh