Engineering BE Electronics and Telecommunication Sem 6 May 2023 2023 EXTC6 Database Management Systm Question Paper - Mumbai University | munotes
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Questions asked in this paper
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Q2 Attempt any THREE questions out of remaining FIVE questions
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Q3 Figures to the right indicates full marks
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Q4 Assume suitable data if necessary Explain in brief the database system architecture with block diagram B Explain three levels of data abstraction. Distinguish between Physical Independence and logical data independence. Which is more difficult to achieve? C are the advantages of DBMS over file System? State the difference between Relational Algebra and Relational Calculus Explain DDL, DML and DCL Commands in SQL with its example F conflict and view serializability A Construct ER diagram and convert into relational model for Airline reservation 10 B Explain two phase locking protocol in detail. 10 A Consider the Following relation: 10
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Q1 Write a query to display names of person containing letters ‘S’
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Q2 Write a query to list number of persons with age > 28 marks
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Q3 Write a query to list person drawing Maximum salary
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Q4 Find the avg of salary
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Q5 Write a query to insert new values in the given relation B Define Normalization. Explain with example 10 Write the following queries in SQL
- (a) Find all customers of the bank who have an account but not a loan
- (b) Find the names of all branches with customers who have an account in the bank and who live in
- (c) Delete the record of all accounts with balances below the average at the
- (d) Find out the total sums of all loan amounts in the bank
- (e) Find the names of all branches where the average account balance is more B Analyze the concept of specialization and generalization? What are the different 10 types of constraints involved in specialization? Distinguish between Total and partial participation and between Disjoint and Overlapping specialization A Explain and solve the following relational algebra operation with example 10
- E. Rename Operator B Illustrate problems of concurrency control with example. 10
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Q6 Attempt any two of following Explain Codd’s Rule in Detail Explain Database Recovery Management c Data Models with example 20 marks
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