This document provides information about getting solved assignments by email or phone. It includes contact details for an assignment help service and then provides sample questions and answers related to a database management systems course. The questions cover topics like entities, attributes, relationships, database manager responsibilities, file organization, the LIKE predicate, relational algebra operations, and object-oriented programming features.

1. Dear students get fully solved assignments
Send your semester & Specialization name to our mail id :
“ help.mbaassignments@gmail.com ”
or
Call us at : 08263069601
Q. 1. Explain the functions of the following:
(a) Entities
PROGRAM BCA (Revised Fall 2012)
SEMESTER 3
SUBJECT CODE & NAME BCA3020– Data Base Management System(DBMS)
CREDIT 4
BK ID B1479
MAX. MARKS 60
Answer:(a) Entities
Answer: Functions, variables, named constants, special forms, and macros are described using a
distinctive typographical format. Table 1-1 illustrates the manner in which Common Lisp functions are
documented. The first line specifies the name of the function, the manner in which it accepts
arguments, and the fact that it is a function. If the function takes many arguments, then the names of
the arguments may spill across two or three lines. The paragraphs following this standard header explain
the definition and uses of the function and often present examples or related functions. Sometimes two
or more related functions are explained in a singl
(b) Attributes
Answer: The keyword __attribute__ allows you to specify special attributes when making a declaration.
This keyword is followed by an attribute specification inside double parentheses. The following
attributes are currently defined for
(c) Relationships

2. Answer: A function is a set of rules to wich you input a value and get an output. So, the set of rules could
be a human body and its complex Chemistry or the program inside a hard drive. An equation is simply
two things being equal in at least
Q. 2. List and explain the important responsibilities of database manager.
Answer: A data administration (also known as a database administration manager, data architect, or
information center manager) is a high level function responsible for the overall management of data
resources in an organization. In order to perform its duties, the DA must know a good deal of system
analysis and programming.
These are the functions of a data
Q. 3. Explain the Sequential File Organization with the help of diagrams.
Answer: A process-data diagram is a diagram that describes processes and data that act as output of
these processes. On the left side the meta-process model can be viewed and on the right side the meta
concept model can be viewed. A process-data diagram can be seen as combination of an business
process model and data model.
The process-data diagram that is depicted at the right, gives an overview of all of these
activities/processes and
Q. 4. Explain the LIKE Predicate
Answer: The LIKE predicate searches for strings that have a certain pattern. The pattern is specified by a
string in which the underscore and percent sign may have special meanings. Trailing blanks in a pattern
are part of the pattern.If the value of any of the arguments is null, the result of the LIKE predicate is
unknown.The values for match-expression, pattern-expression, and escape-expression are compatible
string expressions. There are slight differences in the types

3. Q. 5. Explain basic operations of Relational algebra?
Answer: Relational database systems are expected to be equipped by a query language that can assist
its user to query the database instances. This way its user empowers itself and can populate the results
as required. There are two kinds of query languages, relational algebra and relational calculus. Relational
algebra is a procedural query language, which takes instances of relations as input and yields instances
of relations as output. It uses operators to perform
Q. 6. Explain any two features of Features of Object Oriented System.
Answer:For you new programmers or programmers new to OOP, this article will briefly explain the 4
major principles that make a language object-oriented: Encapsulation, Data Abstraction, Polymorphism
and Inheritence. All examples will be in VB.Net, because in my opinion its easier for a new OOP
programmer to read and understand at first. Certainly don’t think I’m saying you should use one .Net
based language over another, as they all are based on the CLR/CLS and all end up as the same assembly
language when compiled. Its your preference that
Q. 7. Write a note on the following
a)SUBSET Mapping
Answer: SUBSET Mapping.A set is a well defined collection of objects. Well -defined means, that there
exists a mechanism by which one is able to determine whether a given object belongs to a particular set
or not. Objects that belong to a set are called elements or members of the set. Sets are usually denoted
by capital letters and lower case letters are used to represent elements. A set A is said to be a subset of
a set B; if and only if, every element of set A is also an element of set B. Such a relation between sets is
denoted by A ⊆ B. It can also be read as ‘A is contained in B’. The set A is said to be a proper subset if A
⊆ B and A ≠B, and denoted by A ⊂ B. If there is even one member in A that is not a member of B, then A
cannot be a subset of B. Empty set is
b) SUPERSET Mapping
Answer: SUPERSET Mapping. A persistent class with a superset mapping contains attributes derived
from columns of multiple tables. This type of mapping is also known as table spanning. Superset
mappings are used to create "view classes" that hide the underlying data model, or to map a class
inheritance tree to the database using a Vertical

4. Dear students get fully solved assignments
Send your semester & Specialization name to our mail id :
“ help.mbaassignments@gmail.com ”
or
Call us at : 08263069601