[ A-12 ] 808Rol l No. ................. Total No. of Pages : 02Total No. of Questions : 07BCA (Sem.4)DATA BASE MANAGEMENT SYSTEMSubj ect Code : BC-402Paper I D : [B0216]Time : 3 Hrs. Max. Marks : 60I NSTRUCTI ON TO CANDI DATES :1. SECTI ON-A is COMPULSORY.2. Attempt any FOUR questions from SECTI ON-B.SECTI ON-A (10 2 = 20 Marks)1. (a) List various responsibilities of DBA.(b) What is conceptual level of DBMS?(c) What is meant by BCNF? Explain.(d) What is join dependency? Illustrate with example.(e) What is entity relationship model? List its features.(I) What are various features of distributed database?(g) State and explain 3rd Normal Form.(h) What is tuple and attribute?(i) Explain how weak entity is different from strong entity?(j) What are objectives of normalization?SECTI ON-B (4 10 = 40 Marks)2. WhatisDBMS?Whatareitsadvantagesanddisadvantages?Explain. 10[ A-12 ]3. What is data model? Compare and contrast various data models.104. What is relational calculus? Explain different types of relational calculuswith suitableexamples. 105. Write notes on the following : 10(a) Concurrency Control(b) Data integrity6. What is database recovery? Explain the mechanism of log based andshadow paging database recovery techniques. 107. Explain the following : 10(a) Functional dependency(b) SQL808