Question

Consider the following code segments, which are each intended to convert grades from a 100-point scale to a 4 point scale and print the result. A grade of 90 or above should yield a 4.0, a grade of 80 to 89 should yield a 3.0, grade of 70 to 79 should yield a 20, and any grade lower than 70 should yield a 0.0 Assume that grade is an int variable that has been properly declared and initialized Code Segmenti double points = 0.0; ir (grade > 89) points 4.0; else if (grade > 79) points + 3.0; else if (grade > 69) points += 2.0; else points + 0.0; System.out.println (points); Code Segment II double points - 0.0; if (grade > 89) points + 4.0; if (grade > 79) grade 3.0; if (grade > 69) points - 2.0; if (grade points + 0.01 System.out.println (points); Which of the following statements correctly compares the values printed by the two methods? A. The two code segments print the same value only when grade is below 80. B. The two code segments print the same value only when grade is 90 or above or grade is below 80. C. The two code segments print the same value only when grade is 90 or above. D. Both code segments print the same value for all possible values of grade E. The two code segments print different values for all possible values of grade.

Answer 1

The correct comparison between the two code segments, intended to convert grades to a 4-point scale, is that they print the same value only when the grade is 90 or above or below 80, due to the erroneous logic in Code Segment II for grades in the 70-89 range.

Step-by-step explanation:

The student has asked about comparing two code segments that are intended to convert grades from a 100-point scale to a 4-point scale. After analyzing the code provided, it is evident that Code Segment I correctly applies the conversion logic using else-if statements to ensure only one condition is met and the correct grade point is assigned. However, Code Segment II contains multiple if statements without else, which may incorrectly assign a grade point for higher grades and does not contain the correct increment/decrement operators.

The correct statement that compares the values printed by both methods is: B. The two code segments print the same value only when grade is 90 or above or grade is below 80. This is because for grades 90 and above or below 70, both code segments will result in the same grade points (4.0 and 0.0 respectively), while for grades between 70 and 89, the second code segment will erroneously calculate wrong points due to the absence of else.