CPU

Question 1

What does CPU stand for?

Answer 1

Central Processing Unit

Question 2

What is the function of CPU?

Answer 2

Responsible for gathering and executing instructions in their order, as well as controlling peripherals (devices)

Question 3

What are the components in a CPU?

Answer 3

Arithmetic and Logic Unit (ALU)
Control Unit (CU)
Registers
Program Counter
System Clock

Question 4

What does ALU do?

Answer 4

Performs execution of instructions including arithmetic, logic and comparison operation

Question 5

What is arithmetic operation?

Answer 5

Addition, subtraction, multiplication and division

Question 6

What is logic operation?

Answer 6

True and false

Question 7

What is comparison operation?

Answer 7

Greater than, equal to, less than

Question 8

What does CU do?

Answer 8

Directs and coordinates operations in the computer;
Performs fetch-execute cycle;
‘The boss of CPU’

Question 9

What does register do?

Answer 9

Small but fastest storage/memory to the CPU

Question 10

What does program counter do?

Answer 10

Register that stores the address of the currently executing instruction

Question 11

What does system clock do?

Answer 11

Microprocessor that regulates timing and speed of computer system’s functions

Question 12

What is Fetch-Execute cycle?

Answer 12

A process in which a computer receives data and determines what to do with it

Question 13

Process of the Fetch-Execute cycle?

Answer 13

• Fetch - Decode - Execute - Store -

Question 14

What is the fetch process about?

Answer 14

CPU retrieves instructions from a system hard drive or SSD and stores them in a register

Question 15

What is the decode process about?

Answer 15

CPU determines which system components are required in the execution of the instruction and stores them in a register

Question 16

What is the execute process about?

Answer 16

CPU assigns relevant actions to the relevant system components in order to carry out the instructions, processing the actual data

Question 17

What is the store process about?

Answer 17

Processed data is stored in memory locations (Registers, HDD, SSD)

Question 18

What is instruction cycle?

Answer 18

Fetch and decode process

Question 19

What is execution cycle?

Answer 19

Execute and store process

Question 20

Explain the whole process of fetch-execute cycle in Little Man Computer model

Answer 20

• receives value from program counter indicating where to fetch the instruction
• decodes the instruction by reading the instruction set, head to the memory to get the data
• follows instruction and perform task, then tell program counter to +1 for next instruction