800114
| Question | Answer |
| What colour is this? #00FF00 | Green Convert this colour to Hexadecimal. |
| 1001 Convert this number to decimal/denary | 9 Convert this number to binary |
| What is binary? | Binary is a counting system with a base of 2. Computers store all data using binary. |
| Give two reasons computers use binary. | 1. Easy for computers to store and transmit. 2. Less error prone. 3. Calculations are quicker than decimal. |
| What are the main uses of hexadecimal | 1. Image colour representation in RGB. 2. Memory location references. 3.Used in URLs for non-standard characters. |
| Why do we represent colours using hexadecimal, not binary or decimal | Because the code is shorter, and the colours are easier to recognise and change. |
| What is this number in hexadecimal? 24 | What is this hexadecimal number in decimal? F8 |
| How many bits is this binary number? 1001010 | 7 bits |
| How many bits are there in a byte? | 8 bits |
| A3 Convert this number to Denary ( Decimal) | 163 |
| When might we use code from external sources? What are the advantages and disadvantages? | We use code from external sources because it allows us to develop programs more quickly and without specialist knowledge. We have no control over the code, so it might have errors. |
| How many different characters are encoded in ASCII? Give examples of 3 different types or characters. | 128 Characters. Examples: lowercase/uppercase letters, numbers, punctuation marks, printing control codes(now redundant - mostly used when people used typewriters) |
| It will return False |
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