M.C.A MAGADH UNIVERSITY QUESTION, 2014-2017 (Third semester) Database Management systems

M.C.A MAGADH UNIVERSITY QUESTION, 2014-2017 (Third semester) Database Management systems
M.C.A MAGADH UNIVERSITY QUESTION, 2014-2017 (Third semester) Database Management systems

                                                                             2014-2017
                                                                          Time: 4 hours
                                                                        Full Marks: 80
                                                               Answer any five questions.

1. What do you understand by architecture in DBMS? Explain the tree levels of architecture.

2. Define the term data-independence? What is the difference between logical data independence and physical data independence? Which one is hardes to achieve? Why?

3. What is relational algebra and what are its uses? Which are the relational algebraic operations developed specifically for relational database?

4. What are the different database models and what are their advantages and disadvantages.

5. What is SQL ? What are Data control language (DCL) Commands? Explain with example.

6. Explain the network database model? What are the advantages and disadvantages of the network database model?

7. What is normalization? What are its objectives? Explain 2nd, 3rd and 4th normal form.

8. Why the database backup is necessary ? Describe different database backup techniques. Describe the role of DBA in database backup and recovery.

9. What is locking? What are the different types of locks? What are the disadvantages of the basic locking protocol?

10. What is denormalization? What do you perform denormalization? What are the benefits of denormalization?

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