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Roll No. .................................. |
Fifth Semester [B.Tech] - November 2005
Paper Code : ETCS – 309 Subject : Database Management System |
Time : 11/2 Hours |
Maximum Marks : 30 |
Note : Attempt any 3 questions in all. Q1 is compulsory. Each question carries 10 marks. |
Q1 |
( a ) |
Define the following terms:
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4 |
( b ) |
Describe briefly any two desirable properties of a transaction. | 2 | |
( c ) | What is a lossless decomposition? | 2 | |
( d ) | Name the different input/output data constraints in SQL. | 2 |
Q2 |
( a ) |
Find the minimal set of functional dependencies from the
following given set: |
4 |
( b ) |
Consider the following relation: Suppose the following functional dependencies exist:
|
Q3 |
( a ) |
Consider the following database. The priamry keys are underlined.
Person(driver-id#, name, address) Construct the following SQL queries for this database:
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|
( b ) |
Differentiate between the working of time stamping techniques and locking techniques of concurrency control. | 4 |
Q4 |
( a ) |
Let the following relational schema be given: EMPLOYEE(SSN, NAME,
AGE, DNO) For each of the following queries, give an expression in QUEL and QBE.
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6 |
( b ) |
Explain the following terms:
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4 |