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October | 2012 | David Halsey's Computing

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David Halsey's Computing. All about computing science…. Posted in October 2012. In programming languages, an array is a way of storing several items (such as integers). These items must have the same type (only integers, only strings, ) because an array can not store different kinds of items. Every item in an array has a number so the programmer can get the item by using that … Continue reading →. Http:/ www.eastaughs.fsnet.co.uk/cpu/execution-fetch.htm. A computer bus is a let of parallel wires that con...

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Revision | David Halsey's Computing

https://davidhalseyscomputing.wordpress.com/2013/04/19/revision

David Halsey's Computing. All about computing science…. This entry was posted on April 19, 2013 and tagged alevel. One of the ways I am revising is by making a set of revision cards, (This is just a small selection of the set). I found that reading from the textbook wasn’t an effective way of encoding all the information I need to know in my brain. Effective techniques I found include revision cards, posters, and making colourful notes. 3 thoughts on “ Revision. April 19, 2013 at 10:16 am. My A2 Level Co...

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Stepwise refinement (page 13 of aqa textbook) | David Halsey's Computing

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David Halsey's Computing. All about computing science…. Stepwise refinement (page 13 of aqa textbook). This entry was posted on March 25, 2013 and tagged 13. 12)What strategies will you apply? What resources will you use? How will you use these resources? In what order will you use these resources? Are the resources adequate for the task? 13) A module is a self-contained entity that results when a problem is divided into sub-problems; each module corresponds to a sub-problem. Continue to follow A4. Turn ...

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Operating Systems Questions | David Halsey's Computing

https://davidhalseyscomputing.wordpress.com/2013/07/01/operating-systems-questions

David Halsey's Computing. All about computing science…. This entry was posted on July 1, 2013 and tagged a2. What is the role of an operating system? Hides the complexities of the hardware from the user. Manages the hardware resources to give orderly and controlled allocation of the processors, memories and input/output devices among the various programs competing for them, and manages data storage. What are the four key resources managed by an operating system? Processors, Storage, I/O devices, and Data.

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pg 177 questions 8-10 – Jonny Waters

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Computer Science A Level. Pg 177 questions 8-10. 8) Asychronous data transmission is where the transmitter and the receiver are not kept in sync. The receiver is only synchronised with the transmitter only at the time of transmission. 9) The start bit signals impending data, and wakes up and sychronies the timer. The stop bit signals the end of the data, and the data can then be manipulated for whatever purposes required. Digital Certificates →. Leave a Reply Cancel reply. Enter your comment here. Create...

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October 2013 – Jonny Waters

https://jonnywaters.wordpress.com/2013/10

Computer Science A Level. Sum of Numbers Recursion Program. You can add units after this };. For count:=1 to n do. Writeln(‘Total: ‘,total);. Writeln(‘Enter your number: ‘);. Writeln(‘———-‘);. 1 What does SSL stand for (1 mark)? 2 What are the purpose of keys in encryption? 3 Explain and name an example of asymmetrical encryption? A popular implementation of public-key encryption is the Secure Sockets Layer. RSA encryption works like this. Find two huge prime numbers,. To get them, you need to factor.

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April | 2013 | David Halsey's Computing

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David Halsey's Computing. All about computing science…. Posted in April 2013. One of the ways I am revising is by making a set of revision cards, (This is just a small selection of the set). I found that reading from the textbook wasn’t an effective way of encoding all the information I need to know in my brain. Effective techniques I found include revision cards, posters, … Continue reading →. Megan's Computing Blog. My A2 Level Computing Blog. David Halsey's Computing. The WordPress.com Blog.

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March | 2013 | David Halsey's Computing

https://davidhalseyscomputing.wordpress.com/2013/03

David Halsey's Computing. All about computing science…. Posted in March 2013. Stepwise refinement (page 13 of aqa textbook). 12)What strategies will you apply? What resources will you use? How will you use these resources? In what order will you use these resources? Are the resources adequate for the task? 13) A module is a self-contained entity that results when a problem is divided into sub-problems; each module corresponds to a sub-problem. 14)a) Top-down … Continue reading →. March 20, 2013. Samples ...

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July | 2013 | David Halsey's Computing

https://davidhalseyscomputing.wordpress.com/2013/07

David Halsey's Computing. All about computing science…. Posted in July 2013. Phone Operarting Systems Poster. What is the role of an operating system? Hides the complexities of the hardware from the user Manages the hardware resources to give orderly and controlled allocation of the processors, memories and input/output devices among the various programs competing for them, and manages data storage. What are the four key resources managed by an operating … Continue reading →. Megan's Computing Blog.