Computer Science OCR Question and Answer 100% Correct

Computer Science OCR Question and Answer 100% Correct What is the CPU? - Central Processing Unit is the brain of the computer, processes all the data and instructions that make the system work. What does the processing power of a CPU depend on? - The processing power of a CPU depends on different characteristics like its clock speed, number of cores and cache size. What are the 3 characteristics that effect the functioning of the CPU? - clock speed, cache size, number of cores What is the control unit? And what does it do? - Has overall control of the CPU. Main job is to execute instructions by following the fetch-decodeexecute cycle. Controls the flow of data inside the CPU (to registers) and outside of CPU (hardware). What is the Arithmetic Logic Unit? And what does it do? - The ALU basically does all of the calculations. Also performs logic operations. Contains the accumulator register.