Free WGU Foundations-of-Computer-Science Exam Questions

Question 1

The np_2d array stores information about multiple family members. Each row represents a different person, and the columns store family member attributes in the following order:Age (years)Weight (pounds)Height (inches)How is the weight of all family members selected from the np_2d array?

A : np_2d[:, 2]

B : np_2d[:, 1]

C : np_2d[2, :]

D : np_2d[1, :]

Answer: B

Question 2

What is the time complexity of a quicksort algorithm?

A : O(n)

B : O(n log n)

C : O(log n)

D : O(1)

Answer: B

Question 3

What Python code would return the value 2 from np_2d, where np_2d = np.array([[1, 2, 3, 4], [10, 20, 30, 40]])?

A : np_2d[0,1][1]

B : np_2d[0,1]

C : np_2d[2]

D : np_2d[2, 0]

Answer: B

Question 4

The np_2d array stores information about multiple family members. Each row represents a different person, and the columns store family member attributes in the following order:Age (years)Weight (pounds)Height (inches)How is the weight of all family members selected from the np_2d array?

A : np_2d[:, 2]

B : np_2d[:, 1]

C : np_2d[2, :]

D : np_2d[1, :]

Answer: B

Question 5

What Python code would return the value 2 from np_2d, where np_2d = np.array([[1, 2, 3, 4], [10, 20, 30, 40]])?

A : np_2d[0,1][1]

B : np_2d[0,1]

C : np_2d[2]

D : np_2d[2, 0]

Answer: B