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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.
List the guidelines for data design. i. Apply systematic analysis on data. ii. Identify data structures and related operations. iii. Establish data dictionary. iv. Use
A Boolean graph connecting causes and effects. The graph is mainly a digital-logic circuit (a combinatorial logic network) by using a simpler notation than standard electronics not
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The inability of a system or system component to perform a needed function within specified limits.
Repeated inheritance If a class inherits more than once from the same class then it is referred to as repeated inheritance.
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What is meant by software change? Software change is termed as the change in nature of software as the requirements of software changes.
Draw the Context level DFD for the Safe home Software. User commands Alarm type Telephone Number tone Sensor status Display Information
Explain Horizontal partitioning 1. Explains separate branches of the. 2. Propagaton of fewer side-effects 3. Software is simpler to maintain
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