Can anyone help with an example answer to FRQ 2(c) from the 2024 Question Set 1? My students struggled with this and I’m not confident in my explanations/examples.
(c) Suppose another programmer provides you with a procedure called checkValidity(value) that returns true if a value passed as an argument is considered valid by the other programmer and returns false otherwise. Using the list identified in the List section of your Personalized Project Reference, explain in detailed steps an algorithm that uses checkValidity to check whether all elements in your list are considered valid by the other programmer. Your explanation must be detailed enough for someone else to write the program code for the algorithm that uses checkValidity.
I have treated this question as an equalTo question. If youR student had a loop and was checking if a parameter passed is == to something being tested. If those are the same, that returns true, otherwise it returns false. To me, this is combining the FOR loop question and the BOOLEAN question. I have explained to my student to use the following frame work:
Start with a list of items (from my project list).
For each item in the list, do the following:
Pass the item to the checkValidity(value) function.
If checkValidity returns false, then:
Immediately stop checking the rest of the list.
Conclude that not all elements are valid.
Return or record that the list is invalid.
If it returns true, move on to the next item.
If you reach the end of the list and checkValidity returned true for all items:
Conclude that all elements are valid.
Return or record that the list is valid.
Thank you, that is really helpful.