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Describe different steps of the object-oriented design process.
The broad steps of the object-oriented design process are:
a. Define context and modes of use of the system
b. Design system architecture
c. Recognize the principal system objects
d. Identification of the concurrency in problem
e. Handling the boundary condition
f. Developing design models
g. Specify the object interfaces.
With the help of an example display how records can be deleted and updated in QBE. (i) Increase Pay_Rate of employees along with the skill of ‘cook' by 10%. (ii) Delete employee
Write short notes on domain relational calculus The domain relational calculus uses domain variables that take on values from an attribute domain rather than values for whole t
What are the aggregate objects in the data dictionary? Views Match codes Lock objects.
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Benefits of heap files 1. This is a easy file Organisation method. 2. Insertion is somehow capable. 3. Good for bulk-loading data into a table. 4. Best if file
Example- Search the salary of employees who are not 'ANALYST' but get a salary below than or equal to any people employed as 'ANALYST'. SELECT EMPNO, ENAME, JOB, SAL FROMEMP
Define an abstraction by which relationships are treated as higher level entities Ans: Aggregation. It is an abstraction by which relationships are treated as higher level
why are older data models are being replaced by new data models
Critically evaluate the bulleted list of information-related items in this case study. How are each contradictory to the notion of being an information-literate knowledge worker?
Database Administrator One of the main perpose for having the database management system is to have control of both data or programs accessing that data. The person having li
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