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Q. Classes of data items in a data dictionary?
There are three classes of data items in a data dictionary
1) Data element- It is the smallest unit of data that cannot be meaningfully decomposed further. Example- Employee number and so on.
2) Data structure is a group of data elements forms a data structure.
3) Data Flows as well as Data Stores- data flows are data structures in motion whereas data stores are data structures at rest.
The most important feature of spiral model is Risk management is the important feature of spiral model.
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What is a data object? Data object is a collection of attributes that act as an aspect, characteristic, quality, or descriptor of the object.
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