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31 Cards in this Set
- Front
- Back
Definition of a Relational Database. |
A large collection of data items stored in tables containing links between the tables so that the data can be accessed in many different ways and by a range of different applications programs. |
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Definition of File Transfer Protocol. |
A standard Internet protocol providing a simple way of transferring files between computers using the Internet (by a process which bunches the data |
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Definition of Universal Resource Locator (URL). |
The web address of a site / the address for a web page on the world wide web / the recognised |
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Definition of Web Crawler. |
A program that automatically browses all web pages (in a systematic manner). |
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Definition of Feasibility Report. |
The summary of an initial investigation to look at the likelihood of being able to create a new |
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Definition of a Code of Conduct. |
An employee code of conduct consists of rules/agreement drawn up by the senior |
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Definition of a Management Information System (MIS). |
MIS are organised collections of people, procedures and resources designed to support the |
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Definition of Data Consistency. |
Data consistency is the relationship between the input data, the processed data and the output |
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Definition of Data Redundancy. |
Data redundancy is where you store an item of data more than once. |
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Definition of Data Integrity. |
The correctness/truth/accuracy of the data. |
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Definition of Data Independence. |
Data and the applications/programs used to access it are independent/separate |
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Definition of Data Warehouse. |
Refers to large amounts of archived data which are stored together, usually in a |
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Definition of Data Mining. |
The analysis of the data in a data warehouse to identify trends and provide new information. |
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Definition of Management Information System. |
An organised collection of people, procedures |
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Definition of Data Normalisation. |
Simplifying data structures so that attributes in each table only relate to the entity. |
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Definition of Distributed Database. |
A distributed database has data stored on a number of computers at different locations |
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Definition of Web Crawler. |
Continually searches the web looking for new pages and recording information they find which browses the web and keeps an index of what it |
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Definition of a Search Engine. |
An application accessed over the internet that maintains indexes of web pages and logical operators/key words to find the information you require. |
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Definition of a Hyperlink. |
An area of a web page that contains a link to another location on the Web. |
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Definition of Distributed Computing. |
Where a series of computers are networked together, each working on solving the same problem. |
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Definition of a Code of Conduct. |
An employee code of conduct consists of rules drawn up by the senior management or their advisors that set out what an employee is/is not allowed to do in the course of their employment. (It also details the sanctions which will be |
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Definition of Corrective Maintenance. |
‘Bugs' which may not have been identified during the testing process become apparent when the system is operating in a live environment. |
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Definition of Perfective Maintenance. |
Users may, after a period of time find a particular aspect of the software |
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Definition of Adaptive Maintenance. |
Changes in the business environment e.g. change in legislation may mean |
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Definition of a Primary Key |
A primary key is unique and used to identify a record. |
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Definition of a Foreign Key |
A foreign key is a field of one table which is also the primary key of another table and is used to establish links between tables. |
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3 reasons why relational databases are more secure than flat file approach. |
Hierarchy of passwords Storage of data separate to programs Access rights to parts of the program |
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What is meant by network topology? |
The physical configuration of a network showing how it is connected together |
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Advantages of distributed computing |
Reduces cost because a powerful computer (such as a supercomputer) is not needed
Improved performance as each computer can work on part of the data |
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Disadvantages of distributed computing |
Issues with security of data spread out on so many different computers
Heavy reliance on networks and communication which may not always be reliable |
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Factors to be taken into account when designing a good user interface (COLDCU)
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Consistency of signposting
On-screen help Layout appropriate to task Differentiation in user expertise Clear navigational structure Use by disabled people |