Ben Tucker GCSE Blog Computer Science 2019/20

14th Sep 20 QUIZ COMPUTER ARCHITECTURE 1. Early computers were not able to work without human intervention. Why? A. The early computers did not have a memory unit.  B. The early computers were very big.  C. The early computers had frequent power failures.   2. What are the main components of a computer with von Neumann architecture?  A. Processor and input-output devices.  B. Processor, memory unit and input-output devices.   C. CPU, monitor, keyboard and mouse.   3. Which of the following buses is bi-directional?  A. Address bus.  B. Data bus.   C. Control bus.   4. What is the function of control signals?  A. Synchronises the components of the computer .  B. Controls the amount of data to be stored in memory.  C. User sends control signals to control the processor.   5. What is a register?  A. Address of data found in computer memory.  B. High-speed st...

10th Sep 20 L/O:  To research embedded systems An embedded system is a small computer which forms a larger system, device or machine Its purpose is to control the device it is apart of and to allow a user to interact with the system. An embedded system tends to only be capable of doing 1 or few tasks.

30th Jan 20 Parity bit This can be used as a check to see if there is an even or odd number of 1's in a binary number E.G _0110101 To if you need it to be even and it is currently odd, then you will put a 1 to make it even. E.G _1100101 there is 4 1's here and it needs to be odd, so i will add a 5th 1 to make the parity odd. Linear search  A linear search is use when you have an unordered list and you need to find a value or item in the list and by using a linear search you go to the first item and ask is it the number you are looking for, if yes then you stop searching, if no then you continue to search in this manor asking the next item until you find the item you find the item you need or you reach the end and the item you are looking for isn't there. E.G. I need the number 42 in the following list.     23, 29, 34 , 37, 40, 42, 57.         I go to the first number is it 42, No then i go to the second number in the list is this one 42,...

9th Jan 2020 Copyright design & Patents Act. You can copy right; Film, Literature, TV Programs, Song/Music, Pictures, Games, and software. Google says: Copyright means  the exclusive and assignable legal right, given to the originator for a fixed number of years, to print, publish, perform, film, or record literary, artistic, or musical material. Patent means  a government authority or licence conferring a right or title for a set period, especially the sole right to exclude others from making, using, or selling an invention. The Computers Misuse Act. This act was created in 1990 by the UK Government, and this legislation was passed to criminalize unauthorized access to computing systems. As well as harsher punishment for those who then go and use those account that they haven't been authorised to use to use them for criminal  activity's. There are three stages to this act and they are: Stage 1- Unauthorized access to a system and c...

a) A secondary school wants their computer systems to be more accessible to students with disabilities. Describe, with examples, input and output devices which are available for students with disabilities. First you should set up the system with a basic input output system that asks the pupil for their name and then what class they are in and it should ask them in words with a large keyboard so then partially sighted students could use the computers with ease. Braille and a braille printer so that the blind students could also use the computers and then use printouts that could help them when they aren’t using the specialised computers. An eye tracking system so the pupil can look at their class and their name and then look at things on the screen so that they could still use the computers like the other students. Enlarged/zoomed in screen for the visually impaired as well as a text to speech system so the student can check their work without having to read what they wrote, s...

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