| System fundamentals and designs | Computer organisation | Networks | Computational thinking |
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What is parallel installation?
New system starts and the old ones works alongside. As such that data can be input in both. The advantages of this is that if either system fails, you can still use the other one. You can use the old one to check if the new one is working correctly or not
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What is the function of a control unit?
Acts as a regulator to make sure all the functions of the CPU work accordingly.
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What is a LAN (Local Area Network)?
A physical, network that is defined by cables and networking hardware
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What is Abstraction?
This is using a ‘big idea to represent many smaller tasks
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What is External storage ?
Files could be stored on an external flash disk or hard drive. Files could also be stored on a mobile phone or any storage device that is peripheral to the main operating system.
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What are the four steps to the machine instruction cycle?
Fetch, decode, execute and store.
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What is a Peer-to-peer Network?
This when computers are connected to each other via the internet
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What are the fundamental operations of a computer?
Add, Retrieve, Compare and Store are this
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What is a questionnaire?
It is the technique used to extract information from number of people. This method can be adopted and used only by an skilful analyst.
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Toolbars, Menu panel, Windows, Icons, scroll bars, minimize, maximize and exit buttons, preferences
What are common features of applications?
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What are the 7 layers of the OSI model?
These are: Physical, Data Link, Network, Transport, Session, Presentation and Application
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What is Fixed Vocabulary?
Each language has a keyword that can be used (like ‘echo’ or ‘for’). Other words are not usable, unless they are defined.
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What is throw-away prototyping?
A prototype is created and feedback given, but the prototype model is abandoned and a new one created to fit new criteria. Very inefficient and time-consuming.
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Storage devices, like magnetic tape, magnetic disks, compact disks and flash drives, so that the programs or datas can be saved in so that no information will be lost if the computer doesn’t work or shut down.
Why is the need of a persistent storage?
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What is a VPN (Virtual Private Network)?
They create a secure tunnel to another network for authentication
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What is unambiguous meaning?
Code has one meaning.
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What is a sip and puff?
Are good for people who are limited or have no motor to operate switch activated devices, including computers, augmentative communication devices, adapted toys.
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Accepts two input signals which determines what the output signal will be. Example: if both inputs are 1, the output will be 1, otherwise, it’s 0.
What is an AND boolean operator?
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What is a data packet?
A collection of data that is used by computers that need to communicate with one another. This is usually done through the internet.
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What are higher level languages?
This allows programs to be written much quicker and more reliably
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