11. What is the Python library used for scientific computing and is a basis for Pandas?

  • Requests
  • Tkinter
  • Numpy
  • datetime

12. What attribute is used to retrieve the number of elements in an array?

  • a.size
  • a.ndim
  • a.shape
  • a.dtype

13. How would you change the first element to "10" in this array c:array([100,1,2,3,0])?

  • c[0]=10
  • c[4]=10
  • c[2]=10
  • c[1]=10

14. What attribute is used to return the number of dimensions in an array?

  • a.ndim
  • a.shape
  • a.size
  • a.dtype

Module 4 Graded Quiz

15. What is the result of the following lines of code?

a=np.array([-1,1])
b=np.array([1,1])
np.dot(a,b)

  • array([0,2])
  • 1
  • 0

16. How do you perform matrix multiplication on the numpy arrays A and B ?

  • A+B
  • A*B
  • np.dot(A,B)

17. What values does the variable out take if the following lines of code are run?

X=np.array([[1,0,1],[2,2,2]])
out=X[0:2,2]
out

  • array([1,0])
  • array([1,2])
  • array([1,1])

18. What is the value of Z after the following code is run?

X=np.array([[1,0],[0,1]])
Y=np.array([[2,1],[1,2]])
Z=np.dot(X,Y)

  • array([[2,1],[1,2] ])
  • array([[2,0],[1,0]])
  • array([[3,1],[1,3] ])

Shuffle Q/A 2

19. Consider the following text file: Example1.txt:

This is line 1

This is line 2

This is line 3

What is the output of the following lines of code?

with open("Example1.txt","r") as File1:

file_stuff=File1.readline ()

print(file_stuff)

  • This is line 1

  • This is line 1

    This is line 2

    This is line 3

  • This is line 1

    This is line 2

20. What do the following lines of code do?

with open("Example1.txt","r") as file1:

FileContent=file1.readlines()

print(FileContent)

  • Read the file “Example1.txt”
  • Write to the file “Example1.txt”
  • Append the file “Example1.txt”
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