1. Code No: R05411204 R05 Set No. 2
IV B.Tech I Semester Examinations,December 2011
DISTRIBUTED DATA BASES
Common to Information Technology, Computer Science And Systems
Engineering
Time: 3 hours Max Marks: 80
Answer any FIVE Questions
All Questions carry equal marks
1. (a) Discuss the problems in Query Optimization.
(b) Discuss how query optimisation is useful in distributed databases. [8+8]
2. Write a short note on the following:
(a) Prewriters
(b) Centralized controller method
(c) Pseudo-simultaneous
(d) Schedule. [4×4]
3. Explain the following terms:
(a) Transaction,
(b) Management of type lattice,
(c) Management of aggregation graph. [4+6+6]
4. Discuss in detail about Query Processing in Distributed Databases. [16]
5. (a) Write about horizontal and vertical fragmentation.
(b) Given a global relation
EMP(EMPNUM,NAME,SAL,TAX,MGRNUM,DEPTNUM)
Write the mixed fragmentation definition and fragmentation tree of relation
EMP. [8+8]
6. Explain in detail about the Distribution of Catalogs? [16]
7. (a) Discuss the architectural aspects of distributed transactions.
(b) Explain the following:
i. Multiple copies of the data
ii. Transaction failures. [8+8]
8. Give an example of global schema, fragmentation schema and additional semantic
knowledge, and explain how this information can be used for deducing the simpli-
fication of a query. [16]
1

2. Code No: R05411204 R05 Set No. 4
IV B.Tech I Semester Examinations,December 2011
DISTRIBUTED DATA BASES
Common to Information Technology, Computer Science And Systems
Engineering
Time: 3 hours Max Marks: 80
Answer any FIVE Questions
All Questions carry equal marks
1. (a) Discuss the architectural aspects of distributed transactions.
(b) Explain the following:
i. Multiple copies of the data
ii. Transaction failures. [8+8]
2. (a) Write about horizontal and vertical fragmentation.
(b) Given a global relation
EMP(EMPNUM,NAME,SAL,TAX,MGRNUM,DEPTNUM)
Write the mixed fragmentation definition and fragmentation tree of relation
EMP. [8+8]
3. (a) Discuss the problems in Query Optimization.
(b) Discuss how query optimisation is useful in distributed databases. [8+8]
4. Explain in detail about the Distribution of Catalogs? [16]
5. Give an example of global schema, fragmentation schema and additional semantic
knowledge, and explain how this information can be used for deducing the simpli-
fication of a query. [16]
6. Explain the following terms:
(a) Transaction,
(b) Management of type lattice,
(c) Management of aggregation graph. [4+6+6]
7. Write a short note on the following:
(a) Prewriters
(b) Centralized controller method
(c) Pseudo-simultaneous
(d) Schedule. [4×4]
8. Discuss in detail about Query Processing in Distributed Databases. [16]
2

3. Code No: R05411204 R05 Set No. 1
IV B.Tech I Semester Examinations,December 2011
DISTRIBUTED DATA BASES
Common to Information Technology, Computer Science And Systems
Engineering
Time: 3 hours Max Marks: 80
Answer any FIVE Questions
All Questions carry equal marks
1. (a) Discuss the architectural aspects of distributed transactions.
(b) Explain the following:
i. Multiple copies of the data
ii. Transaction failures. [8+8]
2. (a) Discuss the problems in Query Optimization.
(b) Discuss how query optimisation is useful in distributed databases. [8+8]
3. Write a short note on the following:
(a) Prewriters
(b) Centralized controller method
(c) Pseudo-simultaneous
(d) Schedule. [4×4]
4. Explain in detail about the Distribution of Catalogs? [16]
5. (a) Write about horizontal and vertical fragmentation.
(b) Given a global relation
EMP(EMPNUM,NAME,SAL,TAX,MGRNUM,DEPTNUM)
Write the mixed fragmentation definition and fragmentation tree of relation
EMP. [8+8]
6. Give an example of global schema, fragmentation schema and additional semantic
knowledge, and explain how this information can be used for deducing the simpli-
fication of a query. [16]
7. Discuss in detail about Query Processing in Distributed Databases. [16]
8. Explain the following terms:
(a) Transaction,
(b) Management of type lattice,
(c) Management of aggregation graph. [4+6+6]
3

4. Code No: R05411204 R05 Set No. 3
IV B.Tech I Semester Examinations,December 2011
DISTRIBUTED DATA BASES
Common to Information Technology, Computer Science And Systems
Engineering
Time: 3 hours Max Marks: 80
Answer any FIVE Questions
All Questions carry equal marks
1. Write a short note on the following:
(a) Prewriters
(b) Centralized controller method
(c) Pseudo-simultaneous
(d) Schedule. [4×4]
2. Explain in detail about the Distribution of Catalogs? [16]
3. Discuss in detail about Query Processing in Distributed Databases. [16]
4. (a) Write about horizontal and vertical fragmentation.
(b) Given a global relation
EMP(EMPNUM,NAME,SAL,TAX,MGRNUM,DEPTNUM)
Write the mixed fragmentation definition and fragmentation tree of relation
EMP. [8+8]
5. (a) Discuss the problems in Query Optimization.
(b) Discuss how query optimisation is useful in distributed databases. [8+8]
6. Explain the following terms:
(a) Transaction,
(b) Management of type lattice,
(c) Management of aggregation graph. [4+6+6]
7. Give an example of global schema, fragmentation schema and additional semantic
knowledge, and explain how this information can be used for deducing the simpli-
fication of a query. [16]
8. (a) Discuss the architectural aspects of distributed transactions.
(b) Explain the following:
i. Multiple copies of the data
ii. Transaction failures. [8+8]
4