CS4

Question 1

Control unit

Answer 1

directs the operation of the processor

It typically uses a binary decoder

Most computer resources are managed by the CU

Question 2

Aritmetic Logic Unit (ALU)

Answer 2

Is responsible for math calculations or logical operations

Bitwise shifts

It uses the accumulator (ACC) to temporarily store data while performing operations

Question 3

Memory data register

Answer 3

The register in a computer’s CPU that stores the data being transferred to and from the immediate access storage

Question 4

Current Instruction Register

Answer 4

This register holds the instruction which is currently being decoded or executed.

Question 5

Program Counter

Answer 5

A register in a computer processor that contains the address (location) of the instruction being executed at the current time

Question 6

Memory Address Register(MDR)

Answer 6

Is used when reading and writing data to and from RAM. The MDR will contain the
data to be written to RAM, or the data that has just been
read from RAM.

Question 7

Accumulator

Answer 7

The accumulator acts as a temporary storage unit which hold a value in mathematical and logical operations or calculations

Question 8

Address bus

Answer 8

Carries addresses from the Memory Address Register to RAM. The address bus is a unidirectional bus, it only carries addresses in one direction (to RAM).

Question 9

Control bus

Answer 9

It is used by the CPU to communicate with another device or devices that are in the computer.

Question 10

Data bus

Answer 10

A data-centric software framework for distributing and managing real-time data in intelligent distributed systems.