A-LevelComputer ScienceData types and structures9618/31 · Oct/Nov 2022 · Q53 Marks
Write the infix expression in Reverse Polish Notation (RPN). a * b + b - d + 15
- (a)Write the infix expression in Reverse Polish Notation (RPN). a * b + b - d + 15[1]
- (b)(i)Write the RPN expression in infix form. a b - c d + * a /[1]
- (b)(ii)Evaluate your infix expression from part (b)(i) when a = 5, b = 10, c = 27 and d = 12.[1]
Mark scheme
Marking points from the official mark scheme (Oct/Nov 2022). The mark or mark type is shown in brackets.
- [1] a b * b d - + 15 +
- [1] (a - b) * (c + d) / a
- [1] -39
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