A Java program has a class called$$Enrolment$$that stores information about a particular student's enrolment details.

The class has a$$Student$$object as one of its fields. The program designer has chosen to store the student ID as a field in both the$$Enrolment$$class$$and$$the$$Student$$class$.$

This is$...$

Question $10$Answer

a$.$

Bad program design $-$ it is an example of code duplication, which should be avoided.

b$.$

Necessary, as both the Enrolment and Student classes need to access this information.

c$.$

Good program design, as having the variable in two different places ensures it will be correct.

d$.$

Bad program design $-$ it will cause a syntax error, as you can't declare the same field in two different classes.