4 The program flowchart represents a simple algorithm.

Mark scheme

Marking points from the official mark scheme (Oct/Nov 2022). The mark or mark type is shown in brackets.

1. [6] (a) One mark per point: 1 Input UserID and use of GetAverage() and assignment 2 Initialisation of Total to zero and Index to 4 3 Conditional loop with Index from 4 to 6 4 Assignment of Last from element SameMonth[Index] in a loop 5 Structure: IF...THEN...ELSE...ENDIF in a loop 6 Correct assignments and final call to Update () after the loop INPUT UserID Average <- GetAverage(UserID) Total <- 0 Index <- 4 WHILE Index < 7 // REPEAT Index <- Index + 1 Last <- SameMonth[Index] IF Average > Last THEN Total <- Total + Average ELSE Total <- Total + Last ENDIF ENDWHILE // UNTIL Index = 7 CALL Update(UserID, Total) Alternative solution using FOR loop: One mark per point FOR loop solution: 1 Input UserID and use of GetAverage() and assignment 2 Initialisation of Total to zero 3 loop Index from 4 to 6 4 Assignment of Last from array SameMonth in a loop 5 Comparison IF...THEN...ELSE...ENDIF in a loop 6 Appropriate assignments in a loop AND final call to Update () after the loop INPUT UserID Average <- GetAverage (UserID) Total <- 0 FOR Index <- 4 TO 6 Last <- SameMonth [Index] IF Average > Last THEN Total <- Total + Average ELSE Total <- Total + Last ENDIF NEXT Index CALL Update (UserID, Total)
2. [1] (b) Pre-condition (loop) / count-controlled (loop)