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Determine object representation
As a designer, we must choose properly that when to use primitive types in representing objects and when to combine groups of related objects, what is exact representation of object attributes.
What is authorization graph? Passing of authorization from single user to another can be shown by an authorization graph.
er diagram on cosmetics.
Consider the subsequent relations RENTER(rno, fname, lname, address, tel_no, pref_type, max_rent) VIEWING(rno, pno, date, comment) PROPERTY_FOR_RENT( pno, street, area ,city,
In E-R Diagram how relationship type is represented ? In E-R Diagram relationship type is represented as a Diamond.
What is first normal form? The domain of attribute must contain only atomic (simple, indivisible) values.
Why 'AS' clause is used in SQL ? 'As' clause is used for Rename operation. ‘AS' clause is used in SQL for rename operation. (e.g., SELECT ENO AS EMPLOYEE_NO FROM EMP)
Super keys of a relation can have extra attributes. Candidate keys are minimal super key, i.e. such a key have no extraneous attribute. An attribute is known as extraneous if even
Do you have experts of the dbms
What are the different kinds of database end users? Discuss the major activities of each? End-Users - End-users are the people whose jobs need access to the database for que
When It is better to use files than a DBMS? It is better to use files than a DBMS when Multiple users wish to access the data.
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