Given the following declaration: which of the following correctly finds the sum of the elements of the fourth column of sale?
A) sum = 0; For(j = 0; j

Question

Given the following declaration:  which of the following correctly finds the sum of the elements of the fourth column of sale?
A) sum = 0; For(j = 0; j < 7; j++) Sum = sum + sale[j][3]; 
B) sum = 0; For(j = 0; j < 7; j++) Sum = sum + sale[j][4]; 
C) sum = 0; For(j = 0; j < 10; j++) Sum = sum + sale[j][4]; 
D) sum = 0; For(j = 0; j < 10; j++) Sum = sum + sale[j][3];

Quizplus · Accepted Answer

The declaration suggests that there are 10 rows and 5 columns in the dataset (11ea7810_13f6_c33a_bbd5_a90d793dfcda_TB4784_00). The fourth column is indexed as [3] because indexing starts from 0. Therefore, option D correctly indexes the fourth column for each row and sums up the values. Option C is incorrect because the loop runs 10 times and tries to index a nonexistent column. Option A and B both have incorrect column indexes.

Given the Following Declaration: Which of the Following Correctly