HomeWork_ Binary, Hexadecimal & Two's Complement (IGCSE Computer Science)

Description:
A scenario-based practice worksheet for Cambridge IGCSE Computer Science, built around a smart school security system. Covers denary-to-binary conversion, hexadecimal representation of memory addresses, binary addition with overflow, binary shifts for multiplication, and two’s complement for signed values. Includes a fully worked marking scheme with mark allocations (18 marks total) and step-by-step working for every calculation. Ideal for classroom practice, homework, or exam revision.
Please find attached the Question Paper and the corresponding Marking Scheme for your reference and use. The Marking Scheme provides detailed guidance on the expected answers and allocation of marks.