Osmania University (OU) 2007 B.E Computer Science and Engineering Database management systems - Question Paper
FACULTY OF ENGINEERING BE 3/4 (CSE) I Semester (Suppl.) Examination May / June - 2007 Subject : Data Base Management Systems
Time : 3 hours] [Max. Marks : 75
Answer all questions of Part-A and answer any Five questions from Part-B
PART-A (25 marks)
1. Distinguish between a file processing system and a DBMS. 3
2. Explain the difference between a weak and strong entity set. 3
3. State the Thomas write rule ? Mention its importance in transaction processing. 3
4. What are the major problems with processing update operations expressed in terms of views. 3
5. State the differences between lock based protocol and time stamping protocol. 3
6. State BCNF. 2
7. What is QBE ? 2
8. When is it preferable to use a dense index rather than a sparse index. 2
9. Explain the distinction between the terms serial schedule and serializable schedule. 2
10. What are the different modes of lock ? 2
PART - B (5x10=50 Marks)
11 (a) What are the five main functions of a database administrator ? 5 (b) Define the concept of aggregation with an example. 5
12 (a) List the ACID properties. Explain the usefulness of each. 5 . (b) Explain the two phase locking protocol. 5
13. Explain the disk organization technique RAID in detail. 10
14. Identify three typical lists of transactions that are maintained by the recovery sub-system. 10
15(a) Explain the difference between the three storage types. Volatile, nonvolatile and stable. 5
(b) Discuss various types of inner join operations. 5
16 (a) How does index locking resolve the phantom problem ? 5
(b) What is a phantom record ? Discuss the problem that a phantom record can cause for concurrency control. 5
17. Write short notes on the following : 5x2=10
(a) Client Server Architecture
(b) Tuple relational calculus.
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