PMIT-6102 Advanced Database Systems By- Jesmin Akhter Assistant Professor, IIT, Jahangirnagar University

Sample Questions Q-1: “Proximity to its points of use or data localization Improve performance”, Why? Q-2: Problems area and Disadvantages of Distributed Database System? Q-3: Promises of Distributed Database Management system? Q-4: Is timesharing computer system a Distributed Database System? Explain according to your answer. Q-5: What is being distributed? Q-6: Explain Logical data independence and Physical data independence. Q-7:“Autonomy refers to the distribution or decentralization of control, not of data.” Explain Q-8: Network Transparency, Replication Transparency, Data independence? Q-9: Fully Transparent Access Q-10: Improve Performance, Reliability of distributed Database Q-11: What is the fundamental issue in the distributed environment? “The user should be protected from the operational details of the network” Explain Slide 2

Explain the important aspect or desirable property of simple predicates Reasons for Fragmentation Degree of Fragmentation Comparisons of Relocation Alternatives Write an iterative algorithm that would generate a complete and minimal set of predicates Pr’ from a given set of simple predicates Pr. Given relation PAY as in Figure B. Let p 1 : SAL<30000 and p 2 :SAL≥30000 be two simple predicates. Perform a horizontal fragmentation of PAY with respect to these predicates to obtain PAY 1 and PAY 2 Show the Stages of Normalization. Why Repeating Groups are not allowed in a relational design? Bring the following relation to 3rd Normal Form. Draw E-R Diagram for the Banking Enterprise Distinguish between super key and candidate key Determine Keys from E-R Sets All Example Queries For the following relation Fig. A, find the largest account balance Why simple join graph are desirable? Which correctness criteria are satisfied by referential integrity? Slide 3 Sample Questions

Thank You Slide 4