A school has a library system which allows students to borrow books for a length of time. Information relating to students and books is stored in text files. Student information includes name, home address, email address, date of birth, tutor and subject choices. Book information includes author, title, subject category, library location and the date that the book was borrowed. A program helps the staff to manage the borrowing of books.

1. (a)(i)A new module needs to be written to generate emails to send to students who have an overdue book. Students who are sent an email are prevented from borrowing any more books until the overdue book is returned. The process of abstraction has been used when designing the new module. State the purpose of applying abstraction to this problem.[1]
2. (a)(ii)Identify one item of information that is required and one item that is not required in the new module. Justify your choices. Item required Justification Item not required Justification[2]
3. (a)(iii)Identify two operations that would be required to process data when an overdue book is returned. Operation 1 Operation 2[2]
4. (b)Part of the library program contains program modules with headers as follows: | Pseudocode module header | |:---| | PROCEDURE Module-X() | | PROCEDURE Module-Y(BYREF RA : INTEGER, SA : REAL) | | PROCEDURE Overlay() | | FUNCTION Replace(RA : INTEGER, RB : BOOLEAN) RETURNS BOOLEAN | | FUNCTION Reset(TA : STRING) RETURNS INTEGER | Module-X() and Module-Y() are both called from module Overlay(). Complete the structure chart. [Figure X.X][3]

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