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What is data model? Explain object based and record based data models? Ans: A data model is an abstract model in which describes how data is represented and accessed. (i)
Which two files are used during operation of the DBMS? Data dictionary and transaction log are two files used during operation of the DBMS.
The Third Normal Form (3NF) Even though, transforming a relation that is not in 2NF into a number of relations that are in 2NF take out many of the anomalies, it does not neces
Define the concept of generalization A generalization is relationship between specific kind of thing and general thing. It is also known as "is-a-kind-of" relationship. Inher
What is Primary key? Primary Key - Primary key is one of the candidate keys which uniquely identifies each row in the relation.
waht is a repeating group?
Boyce-Codd Normal Form (BCNF) The relation NEWSTUDENT (Enrolmentno, Sno, Sname, Cname, Cno,) has every attributes participating in candidate keys as all the attributes are assu
Performance of Various Concurrency Control Mechanisms
triggering
What was the method in which records are physically stored in a specified order according to a key field in each record ? A method in which records are physically stored within
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