中等ICT-SYST-008
A program adds two test scores. Which component carries out that addition?
A. The control unit, because it stores files.
B. The ALU.✓ 答案
C. A barcode scanner.
D. The modem.
解說
Addition is arithmetic, so the ALU does it. A scanner and a modem are not processors, and the control unit does not replace the ALU.