Unit 3

Question 1

What is a CPU

Answer 1

Responsible for the execution or processing of all instructions and data in a computer

Question 2

What is the ALU

Answer 2

It’s the arithmetic and logic unit - component of cpu that does all maths stuff

Question 3

What is the ACC

Answer 3

Accumulator - temporary general purpose register that stores numerical values at any part of a given register

Question 4

What is the MAR

Answer 4

Memory address register - Register that stores address of memory location currently being read from or write to.

Question 5

What is the CIR

Answer 5

Current instruction register - register that stores the current instruction being decoded and executed

Question 6

What is the MDR

Answer 6

Memory data register - register that stores data just read of memory or data that is about the be written into memory

Question 7

What is PC

Answer 7

Program Counter - register that stores address of the next instruction to be read can be found

Question 8

What is the control unit

Answer 8

Component of the cpu that controls synchronization of data flow by sending signals by the control bus.

Question 9

What is a clock cycle

Answer 9

The time is takes for one fetch decode execute cycle - how many can happen in one second.