A-LevelComputer ScienceAbstract Data TypesMay/June 2025Paper 2 Q211 Marks
A programmer uses a number of Abstract Data Types (ADT) in the programs that she is developing. (a) A stack using memory locations 400 to 409 is used in one program. The diagram represents the current state of the stack. A variable TopOfStack pointer indicates the last value added to the stack. [Figure showing a stack with memory locations 400-409, values 'B', 'D', 'X', 'P' at 400-403, and TopOfStack pointing to 403 ('P')].
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