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COMPUTING GCSE PAPER 1 OCR J277 > 1.1: SYSTEMS ARCHITECTURE TRE fin > Flashcards

1.1: SYSTEMS ARCHITECTURE TRE fin Flashcards

Mr Read

1
Q

What is the purpose of the processor?

A

Processes data
Executes instructions
The ‘brains’

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2
Q

How is the processor speed measured?

A

A clock speed
the number of instructions executed (cycles) per second

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3
Q

What is the clock speed measure in?

A

Hz

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4
Q

What does a core do?

A

Executes instructions independently

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5
Q

What types of core can you have?

A

Dual core
Quad core
8 core

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6
Q

How many instructions per second can a dual core process compared to a single core?

A

Twice as many- it has double the clock speed

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7
Q

What is the definition of concurrent processing?

A

All processors processing simultaneously

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8
Q

What is threading?

A

Sending different instructions to different cores (in multi cores)

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9
Q

What memory is in the processor?

A

The cache

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10
Q

What is the purpose of the cache?

A

Acts as a link between the processor and the main memory
Holds commonly used instructions as programs are being executed
small, fast piece of memory

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11
Q

What are the names of the registers?

A

PC- program counter
MAR-memory address register
MDR-memory data register
CIR- current instruction register

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12
Q

What is the purpose of the accumulator?

A

Holds the result of the ALU’s calculation

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13
Q

What is the purpose of the ALU?

A

Completes the calculations/logic for the computer

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14
Q

What does the control unit do?

A

Synchronises the other components
Decodes instructions (only one that can)

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15
Q

What is the purpose of the program counter?

A

To store the next instruction address and increase the count of the programs

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16
Q

What is the purpose of the memory address register?

A

Stores the address of the current instruction

17
Q

What is the purpose of the memory data register?

A

Stores the data when it has been fetched from the cache and transfers it to the CU

18
Q

What is EEPROM?

A

Electronically editable programmable ROM

19
Q

What is an embedded system?

A

A small computer embedded in another device
Controls the device
Allows user to interact with the device

20
Q

What is an example of an embedded system

A

A washing machine

COMPUTING GCSE PAPER 1 OCR J277 (8 decks)

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