The CPU

Question 1

what is the role of the CPU

Answer 1

to fetch, decode and execute instructions from main memory

Question 2

what is the purpose of the Control Unit (CU)

Answer 2

controls flow of data inside CPU

Question 3

what is the purpose of the Arithmetic Logic Unit (ALU)

Answer 3

to preform mathematical and logical calculations such as + - / * > < <= >=

Question 4

what is the purpose of cache

Answer 4

very fast memory for frequently used data and instructions it is faster than main memory

Question 5

what is the purpose of the Program Counter (PC)

Answer 5

holds the memory address of the instruction of each cycle

Question 6

what is the purpose of the Memory Address Register (MAR)

Answer 6

holds the memory address of the instructions or data about to be used by the CPU

Question 7

what is the purpose of the Memory Data Register (MDR)

Answer 7

holds the data or instruction that has been fetched or is to be written from/to main memory

Question 8

what is the purpose of the Accumulator (ACC)

Answer 8

holds the result of processing from the Arithmetic Logic Unit (ALU)