GCSE Revision Deck 1

Question 1

What is the ASCII value for “A”?

Answer 1

“A”=65

Question 2

What is the ASCII value for “a”?

Answer 2

“a”=97

Question 3

How many characters can ASCII represent?

Answer 3

ASCII can represent 128 characters.

Question 4

How many bits are in a byte?

Answer 4

8 bits in a byte.

Question 5

How many bits are in a nibble?

Answer 5

4 bits in a nibble.

Question 6

How many bytes are in a kilobyte?

Answer 6

1000 bytes in a kilobyte.

Question 7

What is the order of size? Bit→Nibble→Byte→..?

Answer 7

Bit→Nibble→Byte→Kilobyte→Megabyte→Gigabyte→Terabyte.

Question 8

What base is Hexadecimal?

Answer 8

Base-16.

Question 9

How many bits is a single Hexadecimal number equal to?

Answer 9

4 bits, a nibble.

Question 10

10 in Decimal is equal to … in Hexadecimal.

Answer 10

10 is Decimal is equal to “A” in Hexadecimal.

Question 11

What is the binary value of the Hexadecimal value “D”?

Answer 11

“D” in Hexadecimal is equal to “1101” in Binary.

Question 12

What are three advantages of using Hexadecimal?

Answer 12

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.

Question 13

Do computers use Hexadecimal?

Answer 13

No, computers do not use Hex, they still have to convert everything to Binary to process it.

Question 14

What is 10011010 in Hexadecimal?

Answer 14

“10011010” in Binary is “9A” in Hexadecimal.