Computer Science (from 2021) 9618: System Software (Purposes of an OS) Topical Past Paper Questions

(a) Outline the process of using a stack to evaluate an expression written using Reverse Polish Notation (RPN). [3] (b) Write the following infix expression in RPN. (c) The RPN expression $$ +++=11033*666666666 $$ is to be evaluated. Show the changing contents of the stack as the…

(a) Outline the process of optimisation during the compilation of a program. [2] (b) Write the Reverse Polish Notation (RPN) for the given infix expression: $ ((6 + 12) / (16 - 10)) * 18 $ [3] (c) The RPN expression $ c a - b d + * b c + / $ is to be evaluated, where: a = 4, b =…

A car has an automatic braking system. A sensor is used to measure the distance to objects that are in front of the car. The car automatically brakes if an object is too close to the front of the car or the distance between the car and the object is decreasing too quickly. The cl…