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PHYSICAL DBMS ARCHITECTURE
The physical architecture defines the software components used to process and enter data, and how these software components are related and interconnected. Though it is not possible to simplify the component structure of a DBMS, it is possible to recognize a number of key functions which are similar to most database management systems. The components that normally execute these functions are shown in Figure , which depicts the physical architecture of a typical DBMS.
Figure: DBMS Structure
Based on many functions, the database system may be partitioned into the following modules. Some functions (for example, file systems) may be given by the operating system.
What is a data dictionary? A data dictionary is a data structure which keeps Meta data about the structure of the database i.e. the schema of the database.
Physical Records These are the records that are stored in the secondary storage devices. For the database relation, physical records are the group of fields kept in adjacent me
Write an sql statement to find what is the percentage of home policies which are from the state of Arizona out of all Home policies by Policy Value.
Describe the different RAID levels. Discuss the choices of the different RAID levels for different applications. Ans: There are several combinations of these approa
What is catalog in DBMS? Catalog - A relational DBMS maintains information about every table and index in which it contains. A catalog is a collection of special tables that st
The JOIN operation is applied on two relations. When we want to choose related tuples from two given relation join is used. The join operation need that both the joined relations m
What is meant by mean time to failure? The mean time to failure is the amount of time that the system could run continuously without failure.
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)
The users who use easy-to-use menu are called ? The users who use easy to use menu are called as Naïve users.
1. Design the logic, using a looping structure, for a program that outputs every even number from 1 through 25 along with its square and cube. 2. Mr. Sanchez owns 12 apartme
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