Question 8-9A4

A microprocessor's Arithmetic Logic Unit (ALU) is the core component responsible for executing all arithmetic operations (like addition, subtraction, multiplication, and division) and logical operations (such as AND, OR, NOT). In a RADAR system, the microprocessor's ALU would be crucial for processing received signals, calculating target range and velocity, and managing system timing. * **A) The ALU executes arithmetic manipulations.** This is correct. The ALU is specifically designed for performing these computations. * **B) The ALU is used for address decoding.** This is incorrect. Address decoding is typically handled by dedicated decoding logic or a Memory Management Unit (MMU), not the ALU. * **C) General registers are used for arithmetic manipulations.** This is incorrect. General registers *store* data and intermediate results for the ALU, but the ALU itself *performs* the arithmetic manipulations. * **D) Address pointers are contained in the control unit.** This is incorrect. Address pointers (like the Program Counter) are special-purpose registers that are part of the CPU's register file, not strictly "contained in" the control unit, which primarily manages instruction flow and generates control signals.