T2 - Binary + Hex Flashcards

1
Q

1 bit =

A

a single 0 or 1

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2
Q

1 byte

A

= 8 bits = 1 character of text

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3
Q

(A nibble =

A

4 bits or half a byte)

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4
Q

1 kB (kilobyte)

A

= 1000 bytes

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5
Q

1 MB (megabyte)

A

= 1000 kB or 1000x1000 bytes

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6
Q

1 GB (gigabyte)

A

= 1000 MB

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7
Q

1 TB (terabyte)

A

= 1000 GB

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8
Q

1 PB (petabyte)

A

= 1000 TB

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9
Q

Total possible combinations

A

= 2^n
n = number of bits

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10
Q

Most and least significant bits

A

are the bits with the largest and smallest value

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11
Q

Representing largest integers in binary

A

Largest number in 8 bit = 2^8 - 1 = 255

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12
Q

Denary to Hex:

A

Divide the denary number by 16 to get the number of 16s (the left-hand hex digit)
The remainder gives you the units

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13
Q

for hex to denary

A

Multiply the left-hand digit by 16, then add the units

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14
Q

Pros of Hex:

A

much simpler to remember
quicker to write or type
less likely to make an error with fewer digits
easy to convert between hex and binary

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15
Q

Overflow error

A
  • When the result of an addition is too large for the number of bits the computer works with there will be an overflow error
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16
Q

Binary shift operations: to the left

A
  • of one bit doubles the number - *2
  • Left shifts multiply
17
Q

A binary shift to the right

A

results in halving the number
-Right shifts divide

18
Q

Effect of shift:

A
  • very quickly multiply or divide a binary number by a factor of two
    A loss of accuracy can occur if 1 bits are removed