Systems Architecture, Memory and Storage Flashcards

1
Q
  1. Give three characteristics to consider when choosing a suitable type of secondary storage
A

1.Durability,Cost and Reliability

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2
Q
  1. a) How are Magnetic disks read?
    b) what makes this form of media relatively slow?
    c) what makes these vulnerable
A
  1. a)with a moving head inside the disk drive
    b) the moving parts
    c) magnetic fields
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3
Q

3.List 2 advantages of a Magnetic device

A
  1. they can be portable

they have a huge capacity which makes them suitable for desktop purposes

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4
Q

4.List 3 benefits of a solid state drive over a hard disk drive

A

4.The have faster access time than hdd’s
They have lower power consumption
they are more reliable

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5
Q

5.What is flash memory

A

5.Flash mempory is non volatile memory that can be read from and written to

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6
Q

6.Give 2 advantages of flash memory

A
  1. Flash memory is non-volatile, so the items on the camera will not be lost when the camera is turned off.
    Flash memory can be read from and written to, which means new pictures/videos can be taken and they can be played back
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7
Q

7.Give 2 reasons why flash memory is a suitable storage type for an action camera

A

7.Flash memory is compact and lightweight

Flash memory is resistant to impacts, so it is unlikely to be damaged

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8
Q

8.How does optical storage work?

A

8.Lasers write data to the disk and read frrom it

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9
Q

what does the control unit do ? Give an example.

A

controls all the activities taking place in the CPU. It controls the execution of instructions in the correct sequence.

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10
Q

List the 3 operations that the ALU does

A

Logical Operations ,Shift Operations, Arithmetic Operations

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11
Q

What is the function of the MAR?

A

holds the address of the next item of data to be fetched or stored.

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12
Q

What is the function of the MDR?

A

holds data or a instruction temporarily when it is fetched or to be sent to memory

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