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1. Dear students get fully solved assignments
Send your semester & Specialization name to our mail id :
“ help.mbaassignments@gmail.com ”
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ASSIGNMENT
DRIVE SPRING 2015
PROGRAM BCA (REVISED FALL 2012)
Semester 3
SUBJECT CODE & NAME BCA3020 - Database Management System
CREDIT 4
BK ID B 1479
MAX.MARKS 60
Note: Answer all questions. Kindly note that answers for 10 marks questions should be approximately
of 400 words. Each questionis followedbyevaluationscheme.
Q.1 What isDatabase? Explainits properties.
Answer: A database is a collection of information that is organized so that it can easily be accessed,
managed, and updated. In one view, databases can be classified according to types of content:
bibliographic, full-text, numeric, and images. In computing, databases are sometimes classified
according to their organizational approach. The most prevalent approach is the relational database, a
tabular database in which data is defined so that it can be reorganized and accessed in a number of
different ways. A distributed database is one that can be dispersed or replicated among different points
in a network. An object-oriented programming database is one that is congruent with the data defined
inobjectclassesandsubclasses.
Q.2 Write the functionsof the following
(a) Storage Manager
Answer: Storage Resource Monitor provides comprehensive storage performance monitoring and
alertingacrossall your storage arrays to ensure peakperformance andavoidcapacitysurprises.

2. Storage Manager isthe interface tothe systemsstorage service.
Q.3 List and explainthe important responsibilitiesofdatabase manager.
Answer: A database manager (DB manager) is a computer program, or a set of computer programs, that
provide basic database management functionalities including creation and maintenance of databases.
Database managers have several capabilities including the ability to back up and restore, attach and
detach, create, clone, delete and rename the databases. Database managers are used to manage local
and remote databases. They discover databases based on the Web server and provide the ability to
connect to any of the databases residing in the network. They provide a handful of administrative
functionalitiessuchasmanagingtables,viewsandstoredprocedures,aswell asrunad hoc queries.
Q.4 What isRelational Database ManagementSystem?Explain three aspects of RDBMS.
Answer: A relational database management system (RDBMS) is a database management system (DBMS)
that is based on the relational model as invented by E. F. Codd, of IBM's San Jose Research Laboratory.
Many populardatabasescurrentlyinuse are basedon the relational database model.
RDBMSs are a common choice for the storage of information in new databases used for financial
records, manufacturing and logistical information, personnel data, and other applications since the
1980s. Relational databases have often replaced legacy hierarchical databases and network databases
because they are easier to understand and use. However, relational databases have been challenged by
object databases, which were introduced in an attempt to address the object-relational impedance
mismatchinrelational databases,andXMLdatabases.
Q.5 What do you meanby EmbeddedSQL? How do you declare variables and exceptions?
Answer:Advantagesof PL/SQL:
 BetterPerformance
 IntegrationwithOracle
 Cursor FORLoops
 ProceduresandFunctions
 Packages
 PL/SQL Tables
 User-DefinedRecords
Q.6 What are the disadvantages of Data Distribution?
Answer: In a distributed database, data is stored in different systems across a network. For Example, in
mainframes, personal computers, laptops, cell phones, etc. Array expressions specify concurrency but
not locality. That is, they specify opportunities for parallel execution but not how these opportunities
should be exploited so as to minimize communication costs on a parallel computer. HPF introduces data
distribution directives to provide the programmer with control over locality. These directives work as
follows

3. Q.7 Write a note on the following
a) SUBSET Mapping
Answer: In DBMS Writing a Java application that stores data in a RDBMS can be as simple as slapping a
few data-aware components on a form. However, if you rely on data-aware controls you lose the
benefits of encapsulation and set yourself up for a larger maintenance burden ahead. (See the sidebar
"Benefits of the Business Object"). Proper object-relational integration requires a strategy for mapping
the object model to the relational model in order for Java objects to become persistent to the RDBMS. A
persistentobjectisone thatcan automaticallystore andretrieve itself inpermanentstorage.
b) SUPERSET Mapping
Answer: A persistent class with a superset mapping contains attributes derived from columns of multiple
tables.Thistype of mappingisalsoknownas table spanning.
Dear students get fully solved assignments
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