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Distributed Database MSCS Islamia University Bhawalpur (IUB) 2017

Distributed Database MSCS Islamia University Bhawalpur (IUB) 2017 — page 1

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Paper text

Q.No.2: Give short answers (Total marks 24 each question is of 2 marks)

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4) What are characterizations of transaction?

5) How many types of transactions are known in DDS.

6) What is query optimization?

7) What is join ordering in distributed queries?

8) What is serializibility theory in distributed concurrenéy control.

9) What is timestamp based concurrency control algorithm.

10) What is meant by elimination of redundancy

11) How the primary horizontal fragmentation is reduced.

12) What is multidatabase query architecture?

Questionami P. (Total 21 each question is of 7 marks)

Long Questions:

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1). What is heterogeneous query optimization

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2) What is consistency of replicated databases; define its two types in detail.

3) What is centralized query optimization define all of its types.

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