Computer Science: Key Terms Revision

What is the purpose of the CPU?
Purpose of the CPU is to fetch and execute instructions stored in memory
1 of 14
What is an embedded system?
A device which has a built in processor and is programmed to do a specific task
2 of 14
Define clock speed
The number of instructions that can be carried out usually measured in hertz (per second)
3 of 14
Define cache size
Fast access memory that is faster to access than RAM. Stores frequently used instructions
4 of 14
What are cores?
Individual processors within the CPU. Can multitask more.
5 of 14
What is the Von Neumann Architecture?
When the computer programs/instructions and the data are stored in the same memory
6 of 14
What is a register?
A register is fast dedicated memory location within the CPU
7 of 14
What is the memory address register (MAR)?
A register in the CPU that holds the memory address of the current instruction, and then the data that it uses, so that these can be fetched from memory
8 of 14
What is the memory data register (MDR)?
A register which holds the actual instruction, and then the data that has been fetched from memory
9 of 14
What is the program counter (PC)?
A register that holds the address of the next instruction to be executed
10 of 14
What is the current instruction register (CIR)?
A register that holds the current instruction being executed
11 of 14
What is the accumulator?
A register that holds the result of an instruction before it is transferred to memory
12 of 14
What is the arithmetic logic unit (ALU)?
A part of the CPU which carries out arithmetic and logic instructions
13 of 14
What is the control unit?
A part of the CPU that coordinates the CPU activities and decodes the instruction to be executed
14 of 14

Other cards in this set

Card 2

Front

What is an embedded system?

Back

A device which has a built in processor and is programmed to do a specific task

Card 3

Front

Define clock speed

Back

Preview of the front of card 3

Card 4

Front

Define cache size

Back

Preview of the front of card 4

Card 5

Front

What are cores?

Back

Preview of the front of card 5
View more cards

Comments

No comments have yet been made

Similar Computing resources:

See all Computing resources »See all Key terms resources »