Computer Science OCR A level H446 Spec. Simplifies teaching by adhering precisely to specification: Detailed, but concise coverage of each section. Great for home-learning & revision. Simple to use.

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The address bus width determines the maximum possible amount of memory addresses or locations that the system can adderss. In the below images, the scene is clearly identifiable and if you open them in a new tab, you’ll be able to zoom in to fine details such as the house or trees in the background with some clarity. Programs can also share memory for similar tasks - for example a single developer may have multiple programs which have the same function in them. There'sglimpsesofclarityoftheoldspecinthenewonebuthonestly,Ithinkwhoeverwrotethiseitherdidn'tgetpaidenoughorisjustplainlazy.

Think about an encrypted zip file - you add the password at the start, send the password (the key) to someone else (this is key exchange) and they can decrypt and unzip it. A driver is a program that provides an interface to a particular hardware device, managed by the OS.

By connecting all these cables together, these ISPs can create a single network that gives each other access to the entire Internet. This is not always the case, with some programs being unoptimised for this, or require synchronous processing, when they require the result of one calculation before another, so cannot be worked on at the same time. A good algorithm has clear and precise steps that produce the correct output for any set of valid inputs. Procedural decomposition means breaking a large problem into sub-problems, with each of these completing their own distinct, identifiable task.

Virtual memory is a technique used by most operating systems to use a portion of secondary storage like a HDD or SSD as memory. Get in touch and we will contact you to make arrangements for a personalised, video-based tour at a time convenient to you. They can handle large amounts of visual data at once as they have thousands of small cores for this processing in parallel, making them much more efficient than the CPU for a minority of tasks.I had it with me at the CAS conference (light reading on the train), several others saw it and we all thought it looks excellent. In an exam, most hierarchy chart scenarios will probably include initialising variables, the main process program (to be further decomposed) and the final output. It replaces repeated, consecutive patterns of the same data with a “summary” - an instance of that specific element, as well as a count of it.

The values of neighbouring nodes are then recalculated, assigning them the value of the shortest path to these nodes, and updated if a shorter path is found. TCP is susceptible to ping spikes, and UDP is susceptible to packet loss (hence why in online games you get packet loss and ping spikes - they use both depending on what’s being requested! Holds the memory address of the next instruction to be fetched, decoded and executed by the processor.

Look,Iknowit'snicetoknowextrainformationaboutthecontentinthespec(especiallyifyouloveyoursubjectlikeme)butwhenitgetstothethosefinaldaysbeforetheexam,ITDOESN'TMATTER.