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Computing > Memory And Storage > Flashcards

Memory And Storage Flashcards

1
Q

Name 2 character sets

A
  • ASCII
    *Unicode
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2
Q

What is the difference between Unicode and ASCII?

A

Unicode is universal (emojis, symbols, etc) (16 bits)
ASCII is general English characters (8 bits)

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3
Q

How is an image stored in a computer?

A

With pixels

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4
Q

What is a pixel?

A

A square represented by a binary code

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5
Q

What is represented by the binary code in a pixel?

A

Colour

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6
Q

How do you find file size of an image?

A

Colour depth x resolution

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7
Q

What is metadata?

A

Data about data (author, place image was taken)

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8
Q

How is sound stored in a computer?

A

The height of the wave (amplitude) is stored as binary

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9
Q

How many bytes in a kilobyte?

A

1000

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10
Q

How many bytes in a megabyte?

A

1,000,000

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11
Q

Explain why computers use binary

A

Computers only understand 0’s and 1’s so each character needs to be stored as binary to be understood

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12
Q

What is binary 0 + 0 ?

A

0

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13
Q

What is binary 0 + 1 ?

A

1

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14
Q

What is binary 1+1?

A

10

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15
Q

What is binary 1+1+1 ?

A

11

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16
Q

How many bits in a byte?

A

8

17
Q

How many bytes in a kilobyte?

A

1000

18
Q

How many bytes in a megabyte?

A

1000000

19
Q

Why does a computer store data and instructions in binary?

A

Binary is one’s and zeros (on and off). A computer uses switches (on and off) to store data

20
Q

Translate to denary: 01101001

A

105

21
Q

Convert 78 to binary

A

01001110

22
Q

Add 11001011 to 10010101

A

101100000

23
Q

Name the five rules of binary addition

A
  • 0 + 0 = 0
  • 0 + 1 = 1
  • 1 + 0 = 1
  • 1 + 1 = 10
  • 1 + 1 + 1 = 11
24
Q

What happens in a binary shift two places to the left?

A

Multiply by 4

25
Q

Convert 3C to binary

A

00111100

Computing (5 decks)

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