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1. Dear students get fully solved assignments
Send your semester & Specialization name to our mail id :
help.mbaassignments@gmail.com
or
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SUMMER 2016, ASSIGNMENT
PROGRAM MCA(REVISED FALL 2012)
SEMESTER THIRD
SUBJECT CODE & NAME MCA3020- ADVANCED DATABASE MANAGEMENT SYSTEM
CREDIT 4
BK ID B1650
MAX. MARKS 60
Note:Answer all questions.Kindlynote that answersfor 10 marks questions
1. Differentiate betweenTwo-Tierclient/serverdatabasesand Multi-tierclient/serverdatabases.
Answer: Two-Tier Architecture:
The two-tier is based on Client Server architecture. The two-tier architecture is like client server
application. The direct communication takes place between client and server. There is no
intermediate between client and server. Because of tight coupling a 2 tiered application will run
faster.
2. Explain the physical query plan operators. What is the significance of Iterators?
Answer:A planrepresentshowdataflows from a child operator to a parent operator in the form of
a tree structure. Query execution flow can be read from right to left and from top to bottom.
In this article we’ll discuss some common and important operators like Index seek/scan, Join
(Nested, Merge, and Hash), etc., which are useful to interpret a graphical execution plan and
troubleshoot any performance issue due to a
3. Differentiate between Serialisability and Recoverability.
Answer: Serializability

2. Serializabilityisthe classical concurrencyscheme.This helps to ensures that a schedule with regard
to performingexecutingconcurrenttransactionsisequivalenttoone that executes the transactions
serially in some order. It assumes that all accesses
4. Discuss about Parallel query processing. How parallel-execution works?
Answer: When Oracle runs SQL statements in parallel, multiple processes work together
simultaneously to run a single SQL statement. By dividing the work necessary to run a statement
amongmultiple processes, Oracle can run the statement more quickly than if only a single process
ran it. This is called parallel execution or parallel processing.
Parallel execution dramatically reduces response time for data-intensive operations on large
databasestypicallyassociatedwithdecisionsupportsystems(DSS) anddatawarehouses.Symmetric
multiprocessing (SMP), clustered systems, and
5. Differentiate between homogeneous and heterogeneous Database.
Answer:A DDBMS maybe classifiedashomogeneousorheterogeneous.Ina homogeneous system,
all sites use the same DBMS product. In a heterogeneous system, sites may run different DBMS
products,whichneed not be based on the same underlying data model, and so the system may be
composed of relational, network, hierarchical and object-oriented DBMSs.
Homogeneous systems are much easier to design and
6. Write short notes on ODMG standards. What are the various components of ODMG-93?
Answer: The ODMG standard builds upon the existing OMG, SQL-92, INCITS (formerly ANSI)
programming language standards, and JavaSoft’s Java specification to define a framework for
application portability between compliant data storage products. The standard’s functional
components include an Object Model, an Object Definition Language, an Object Query Language,
and Language Bindings to Java, C++, and Smalltalk.
The two primary benefits of the ODMG
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