Case-Based Critical Thinking Questions Case 9-2 Gregor, a software developer, is developing a calendar application. He has to use several if conditional statements to ensure that the calendar displays the exact number of days present in each month of each year. He creates a dayCount array to keep track of the number of days in each month. Gregor wants to create a condition to ensure that all the years divisible by 4 should contain 29 days in February. Which of the following statements should he use?
A) if (thisYear % 4 === 0) { dayCount[1] = 29; }
B) if (this year/4 === 0) { dayCount[2] = 29; }
C) if (this year*4==0) { dayCount[1] = 29 }
D) if (thisYear % 4 dayCount[2] = 29; }

Question

Quizplus · Accepted Answer

The statement if (thisYear % 4 === 0) { dayCount[1] = 29; } correctly checks for whether a year is divisible by 4 using the modulus operator (%). If the remainder is 0, it means that the year is divisible by 4, allowing for a leap year with 29 days in February. Hence, option A is the best choice. Option B is incorrect as the division operator (/) does not check whether a number is divisible by another number. Option C is incorrect as multiplying the year by 4 is not a valid way to check whether the year is divisible by 4. Option D is incorrect as the statement is incomplete, and it does not check whether a year is divisible by 4 before changing the number of days in February.

Case-Based Critical Thinking Questions Case 9-2 Gregor, a Software Developer