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Introduction to Using Data Sets Practice Test
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Q1
A store tracks weekly sales in an int[] and uses totals for restocking decisions. Consider:
At a pop-up snack shop, the owner logs daily granola bar sales for a 7-day event to decide whether to reorder more inventory. Because the event lasts exactly one week, an array is used where each element stores one day’s sales. When a counting mistake is found, the owner must modify one element and then recompute totals to make an accurate reorder decision.
int[] dailySales = {20, 18, 22, 19, 25, 21, 17};
int total = 0;
for (int i = 0; i <= dailySales.length; i++) {
total += dailySales<u>i</u>; // add each day
}
System.out.println(total);
Refer to the problem scenario in the passage, identify the error in the code snippet and suggest a fix.
A store tracks weekly sales in an int[] and uses totals for restocking decisions. Consider:
At a pop-up snack shop, the owner logs daily granola bar sales for a 7-day event to decide whether to reorder more inventory. Because the event lasts exactly one week, an array is used where each element stores one day’s sales. When a counting mistake is found, the owner must modify one element and then recompute totals to make an accurate reorder decision.
int[] dailySales = {20, 18, 22, 19, 25, 21, 17};
int total = 0;
for (int i = 0; i <= dailySales.length; i++) {
total += dailySales<u>i</u>; // add each day
}
System.out.println(total);
Refer to the problem scenario in the passage, identify the error in the code snippet and suggest a fix.