Download JNTUH MCA 5th Sem R15 2019 December 825AC Distributed Databases Question Paper

Download JNTUH (Jawaharlal nehru technological university) MCA (Master of Computer Applications) 5th Sem (Fifth Semester) Regulation-R15 2019 December 825AC Distributed Databases Previous Question Paper

R15

Code No: 825AC



JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD

MCA V Semester Examinations, December - 2019

DISTRIBUTED DATABASES



Time: 3 Hours













Max. Marks: 75



SNote: This question paper contains two parts A and B.

Part A is compulsory which carries 25 marks. Answer all questions in Part A. Part B
consists of 5 Units. Answer any one full question from each unit. Each question carries
10 marks and may have a, b, c as sub questions.



PART - A



















5 ? 5 Marks = 25

1.a) Distinguish between distributed versus centralized databases.





[5]

b) What is an operator tree of a query? Explain the use of operator graph.



[5]

c) What do you mean by distributed transaction? Explain.







[5]

d) What are the design issues of a reliable distributed database?





[5]

e) What is pointer swizzling? Explain its advantages and disadvantages.



[5]



PART - B

















5 ? 10 Marks = 50

2.a)

What is referential integrity? Give an example.

b)

Write the criteria used for checking correctness of fragmentation.



[5+5]

OR

3.

Given a global relation:



EMP (EMPNUM, NAME, SAL, TAX, MGRNUM, DEPTNUM).



Write the mixed fragmentation definition and fragmentation tree of relation EMP.[10]



4.a)

How fragmented relation simplification is done? Explain.

b)

What is the use of algebra of qualified relations? Discuss.





[5+5]

OR

5.

Explain the following for distributed databases.



a) Operations in a parametric query



b) GROUP by operation for evaluating aggregate functions.





[5+5]


6.

Explain in detail various methods used for deadlock detection.





[10]

OR

7.a)

Write about computational structure of distributed transaction.

b)

What is serializability? Illustrate this concept with an example.





[5+5]


8.

Explain about quorum based commitment protocols.







[10]

OR

9.

Discuss object naming and catalog management with site autonomy.



[10]


10.a) What are the issues related to query processing and optimization in object DBMS?

Discuss.

b) Explain object query processor architecture.









[5+5]

OR

11.a) Define type lattice and its management.
b) Explain the management of composition graph.









[5+5]



---ooOoo---