S364 Final UPDATED Exam Questions and CORRECT Answers

S364 Final UPDATED Exam Questions and
CORRECT Answers
Since NumPy arrays can only have one data type in an array the following code would cause a
Run-time error (not work).


import numpy as np

arr_a = np.array([1, "2", 0]) - CORRECT ANSWER - False


The following code creates a NumPy list of integers.
import numpy as np

arr_a = np.array([1, 2, 0.0]) - CORRECT ANSWER - False


import numpy as np
#Python Lists:
a = [1, 3, 5, 7, 9]
b = [2, 4, 6, 8, 10]
c=a+b
#NumPy Arrays:
an = np.array(a)
bn = np.array(b)
ac = an + bn

print(ac) - CORRECT ANSWER - [1, 3, 5, 7, 9, 2, 4, 6, 8, 10]
[ 3 7 11 15 19]


If we have a 1-diminsional array we can convert it to a 2-dimensional array using what method?
- CORRECT ANSWER - np.reshape()

, To determine the dimensions of a NumPy array we can use what code? - CORRECT
ANSWER - arr.ndim


The following code would be considered what kind of NumPy array?
import numpy as np
arr = np.array([[1, 3, 5],
[2, 4, 6],

[5,6,7]]) - CORRECT ANSWER - 2-dimensional


The following code would cause an run-time error (would not work).


a = np.array([1, 3, 5])

b = np.array([6]) - CORRECT ANSWER - False


To fill a one-dimensional NumPy array of 10 elements with all zeros we can use - CORRECT
ANSWER - np.zeros(0,0)


To create a 2-dimensional array of random numbers we could use the following code -
CORRECT ANSWER - np.random.randint(0, 10, (3, 3))


To print out the first row of the following NumPy array I could use


import numpy as np
b = np.array([[5, 3, 1],

[2, 4, 6]]) - CORRECT ANSWER - More than one of these options would work:
print(b[0, :])
print(b[:])
print(b(0))
print(b[0])