SLR2- 1.1: Types of processor- The differences between and uses of CISC and RISC processors

Question 1

What is an instruction set?

Answer 1

An instruction set is a set of all instructions written in machine code that can be recognised and executed by a given processing unit/CPU

Question 2

What does CISC stand for?

Answer 2

Complex Instruction Set Computer

Question 3

What does RISC stand for?

Answer 3

Reduced Instruction Set Computer

Question 4

What does a CISC processor consist of?

Answer 4

A larger instruction set that includes more complex instructions

Question 5

What are the key features of CISC processor?

Answer 5

• More complex instructions = More than one clock cycle to execute
• Has more general purpose registers
• Instructions take up less space in memory

Question 6

Where are CISC processors used?

Answer 6

Used in laptops and desktop computers

Question 7

What does a RISC processors consist of?

Answer 7

A smaller instruction set with more simple instructions

Question 8

What are the key features of RISC processor?

Answer 8

• One instruction= One clock cycle to execute
• Compilers are more complicated so will generate more instructions
• Has fewer addressing modes

Question 9

Which type of processor is more suitable for pipelining?

Answer 9

RISC

Question 10

Where are RISC processors used?

Answer 10

Used in smartphones and tablets

Question 11

Look at notes- table of differences and test self