SQA National 5 Computing Science Practice Exam

Binary code in computing is defined as a system that uses two symbols, typically 0 and 1. This system is fundamental to how computers process and store data, as all information is ultimately represented in binary form. Each binary digit, or bit, can either be a 0 or a 1, allowing the representation of a wide range of data types, including numbers, characters, and instructions. Because computers operate on a binary system, this allows for efficient processing and transmission of information within digital circuits, making it essential to the functioning of modern computing technology.

The other options do not accurately describe binary code. For instance, using only red and blue symbols does not pertain to the binary system; rather, it suggests a different form of representation, which is not software-based. A numeric system using one to ten refers to the decimal system, which is unrelated to the binary code specifically focused on two-digit combinations. Finally, a representation of data only in decimal format contradicts the very definition of binary code, which is exclusively based on the presence of two digits, allowing for a completely different form of data encoding.