Which unit of a computer performs all logical and arithmetical operations?

ALU

The correct answer is Option (1) - ALU

The unit of a computer that performs all logical and arithmetical operations is the ALU (Arithmetic Logic Unit).

• ALU is responsible for carrying out basic mathematical operations like addition, subtraction, multiplication, and division.
• It also performs logical operations like comparisons (greater than, less than, equal to) and bitwise operations (AND, OR, NOT).
• OU (Output Unit) handles sending processed data to external devices like monitors or printers.
• CU (Control Unit) fetches instructions from memory, decodes them, and controls the flow of data within the CPU.
• IU (Input Unit) is responsible for receiving data from external devices like keyboards or mice.