A-LevelComputer ScienceData types and structures9618/31 · May/June 2025 · Q125 Marks
The pseudocode algorithm checks whether a location in a stock file StockList.dat is empty or not. The location is given by the user. If the location is empty, a suitable message is displayed, otherwise the item stored at that location is displayed. Complete this file-handling pseudocode algorithm. DECLARE Location : INTEGER DECLARE Item : STRING DECLARE Continue : BOOLEAN DECLARE Answer : CHAR Continue ← TRUE OPENFILE WHILE Continue OUTPUT "Enter a location between 1 and 500: " INPUT Location GETRECORD IF Item = "" THEN OUTPUT "This record is missing." ELSE OUTPUT "The item in stock is ", ENDIF OUTPUT "Another location (Y or N)?" INPUT Answer IF Answer <> 'Y' THEN Continue ← FALSE ENDIF ENDWHILE OUTPUT "End of program"
- Complete this file-handling pseudocode algorithm.[5]
Mark scheme
Marking points from the official mark scheme (May/June 2025). The mark or mark type is shown in brackets.
- [1] OPENFILE "StockList.dat" FOR RANDOM
- [1] SEEK "StockList.dat", Location
- [1] GETRECORD "StockList.dat", Item
- [1] OUTPUT "The item in stock is ", Item
- [1] CLOSEFILE "StockList.dat"
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