GCSE Revision Deck 1 Flashcards
What is the ASCII value for “A”?
“A”=65
What is the ASCII value for “a”?
“a”=97
How many characters can ASCII represent?
ASCII can represent 128 characters.
How many bits are in a byte?
8 bits in a byte.
How many bits are in a nibble?
4 bits in a nibble.
How many bytes are in a kilobyte?
1000 bytes in a kilobyte.
What is the order of size? Bit→Nibble→Byte→..?
Bit→Nibble→Byte→Kilobyte→Megabyte→Gigabyte→Terabyte.
What base is Hexadecimal?
Base-16.
How many bits is a single Hexadecimal number equal to?
4 bits, a nibble.
10 in Decimal is equal to … in Hexadecimal.
10 is Decimal is equal to “A” in Hexadecimal.
What is the binary value of the Hexadecimal value “D”?
“D” in Hexadecimal is equal to “1101” in Binary.
What are three advantages of using Hexadecimal?
It is simpler to remember large numbers in Hexadecimal - they’re far shorter than Binary numbers.
Due to Hex numbers being shorter there’s less chance of input errors.
Its easier to convert Binary and Hex than Binary and Decimal.
Do computers use Hexadecimal?
No, computers do not use Hex, they still have to convert everything to Binary to process it.
What is 10011010 in Hexadecimal?
“10011010” in Binary is “9A” in Hexadecimal.
