Procedures & Parameters: BYVAL vs BYREF – Pseudocode Practice Worksheet (with Marking Scheme)

A 10-question worksheet exploring the difference between passing parameters by value (BYVAL) and by reference (BYREF) in pseudocode procedures. Covers integers, strings, reals, booleans, and arrays, building from simple two-parameter procedures to four- and five-parameter exam-style questions, an error-finding task, and a final “design a procedure” challenge. Each question includes a pseudocode extract in a clearly formatted code box, structured sub-questions (predict the output, explain the behaviour, identify parameter-passing mode), and ruled space for written answers. A full marking scheme with worked solutions and mark allocations (60 marks total) is included, making this suitable for independent practice, homework, in-class assessment, or exam preparation on procedures and parameter passing.
Assessment Documents Ready to Print

Two documents are ready:

Question Paper – fully formatted and ready to print and distribute to students.
Step-by-Step Marking Scheme – detailed marking guidance with clear explanations of how each question should be marked and how marks are awarded.