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Which two files are used during operation of the DBMS? Data dictionary and transaction log are two files used during operation of the DBMS.
Examples:- Hierarchical Model: It tells data as and relationships by hierarchy of data values. Figure illustrates an example of hierarchical model. Now a day's these models are
Question: In a multi-user database environment, locking mechanisms can be used to solve the three basic problems of concurrency. On the other hand, however, locking may also le
What is persistency? Persistency ensures which data is stored and that after the object is no longer available (program stops running) the data will be available to other users
An ideal data dictionary should have everything a DBA wants to know about the database. 1 Conceptual, External, and internal database descriptions. 2. Descriptions of attr
What is the used of specifying alias? Specifying alias: is used to rename column or attribute in a table.
What are the two types of serializability? The two types of serializability is a) Conflict serializability b) View serializability
Explain the cartesian product in Database Management System
Can a filed occur in several field groups. Yes. But it leads to redundant data redundancy.
What is average response time? The average response time is that the average time for a transaction to be done after it has been submitted.
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