Exam 1z0-808 topic 1 question 152 discussion

good answer is D

Tested. Answer is D: -1 Code- public class Test{ public static void main(String[] args) { int wd = 0; String days[] = {"sun", "mon", "wed", "sat"}; for(String s:days) { switch (s) { case "sat": case "sun": wd -= 1; break; case "mon": wd -= 1; break; case "wed": wd += 2; } } System.out.println(wd); } }

Answer is D.

Was confused on this one so an explanation in case anyone else is stuck! Because case "sat" doesn't have a break statement it then falls through the rest of the cases until it reaches a break. Therefore it hits the case "sun" statement, performs the subtraction of 1 and then breaks. So as it loops you get: Sun (wd=-1), Mon (wd=-2), Wed (wd=0), Sat (wd=-1)

Answer is D. To test: public static void main(String[] args) { int wd = 0; String days[] = {"sun", "mon", "wed", "sat"}; for(String s:days) { switch (s) { case "sat": case "sun": wd -= 1; break; case "mon": wd -= 1; break; case "wed": wd += 2; } } System.out.println(wd); }

The answer is the letter C, the compilation fails because the variable "wd" is an instance variable and is not local, instance variables to receive additions of values ​​inside a static method need to be static, as it is not, the code failure.