WAEC Computer Studies 2019 Paper

Concept:Machine language is the lowest-level language that a computer can understand directly.Explanation:Machine language instructions are written using only two digits: $0$ and $1$.This two-digit system is known as the binary number system.A computer’s electronic circuits operate in two states, on and off, which correspond to $1$ and $0$.Therefore, every machine instruction is ultimately expressed in binary form.Answer:A. binary.