Which unit of a computer performs all logical and arithmetical operations?
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → ALU
The Arithmetic Logic Unit (ALU) is the part of the CPU that does the actual calculating. It carries out arithmetic operations (addition, subtraction, multiplication, division) and logical operations (comparisons such as greater than, less than or equal to, and AND, OR, NOT).
Why the other options are incorrect
Option (2) OU — Incorrect. The Output Unit sends processed results out to devices such as the monitor or printer.
Option (3) CU — Incorrect. The Control Unit directs and coordinates the other units; it does not calculate itself.
Option (4) IU — Incorrect. The Input Unit takes in data from devices such as the keyboard and mouse.