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IB Exam Review
IB Computer Science Java
10
Computer Science
12th Grade
12/09/2008

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Term
feasibility report
Definition
During the analysis stage it is important to document economic, technical (hardware, software, systems, etc), operational, scheduling, and legal issues.
Term
cache memory
Definition
The purpose is to speed up the running of programs and it is often situated between the RAM and the processor. Contains commonly used code or the latest used codes.
Term
virtual memory
Definition
This is needed when there is not enough main memory. For example running large programs or running many programs at the same time.
Term
direct access
Definition
Records can be accessed fast because they can be read or written to without the need to pass through any of the records prior to them.
Term
CASE tools (Computer Aided Software Engineering)
Definition
This category of software is used by development team in order to coordinate the development process. Tools include - analysis, system modeling, flow diagrams, scheduling tasks, preparing documentation, controlling software versions, generating code, editing, testing and debugging.
Term
parallel running
Definition
An implementation method which runs the old and new systems at the same time. See CS Java Enabled pg8 for more info.
Term
phased introduction
Definition
An implementation method where the old system is replaced one part at a time, tested and confirmed. Training and implementation is over a longer period of time. See CS Java Enabled pg8 for more info.
Term
direct changeover
Definition
An implementation method that is used when there is little to no overlap between the old and new systems and/or the old system is going to be completely replaced. See CS Java Enabled pg8 for more info.
Term
interactive online processing
Definition
When the user is connected by a computer or terminal to a network and is able to communicate and respond to other users on the system or server. This is commonly seen on reservation system in order to avoid double booking and in online banking.
Term
real time processing
Definition
A computer system that is pre-programmed to respond to inputs without the need for human interaction. This reduces the time it takes between the input being received and the necessary action being performed. These systems are often found in embedded devices like heat monitors in VCRs and medical devices like pacemakers.
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