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Describe five main functions of a database administrator.
Ans: A database administrator (DBA) is a person who is accountable for the environmental aspects of a database. Generally, these include:
a) Recoverability - Creating and testing Backups
b) Integrity - Verifying or helping to verify data integrity
c) Security - Defining and/or implementing access controls to the data
d) Availability - Ensuring maximum uptime
e) Performance - Ensuring maximum performance
f) Development and testing support - Helping programmers and engineers to efficiently utilize the database.
What is meant by object identifiers? Object-oriented systems use an object identifier to recognize objects. Object identifiers are unique: that is every object has a single ide
Describe the benefits of OOD techniques OOD techniques are very useful for development of large and complex systems. It has been noted that large projects that are developed u
The Transactions- A transaction is definite as the unit of work in a database system. Database systems that deal with a huge number of transactions are also termed as transaction p
Question A What is operational intelligence? Question B What is Business Intelligence? Explain the components of BI architecture Question C Differentiate between databas
1) Information about a bank is about customers and their account. Customer has a name, address which consists of house number, area and city, and one or more phone numbers. Ac
Describe the algorithm for updating indices for a single level index when a record is (i) Inserted (ii) deleted What will be the modification if there are multilevel in
PHYSICAL DBMS ARCHITECTURE The physical architecture defines the software components used to process and enter data, and how these software components are related and interc
Set Difference If R1 and R2 are two union compatible relations or relations then result of R3 =R1- R2 is the relation that have only those tuples that are in R1 but not in R2.
Creating a view: A query can be embedded within the CREATE VIEW STATEMENT A query can have complex select statements containing join, groups and sub- queries A quer
Write short notes on relational model The relational model uses a collection of tables to show both data and the relationships between those data. The relational mo
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