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Question 1 Discuss the classification of DBMS based on location of database
Question 2 Explain with examples different SQL commands used for creating and deleting relations. Write a short note on ACID properties of transaction model
Question 3 Define functional dependency. Give examples. Also describe 1st, 2nd and 3rd normal Forms
Question 4 Explain the various heuristics involved in query optimization. Also describe the various algorithms for executing query operations
Question 5 Describe the most important classes of parallel machines
Question 6 How is two phase locking method used to ensure serializability? Illustrate
Explain what is DDL? DDL - Data Definition Language: statements used to define the database structure or schema. Some examples: CREATE - to create objects in the database ALT
The Second Normal Form (2NF) Definition: A relation is in 2NF if it is in 1NF and each non-key attribute is fully dependent on each candidate key of the relation. Some of th
Write short notes on Schema diagram. A database schema along with primary key and foreign key dependencies can be depicted pictorially by schema diagram. Every relation appears
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How does a query tree represent a relational algebra expression? Discuss any three rules for query optimisation, giving example as to when should each rule be applied. Ans
Having clause This clause is used for producing conditions on grouped information. Example: Find maximum salary and department number of those departments where maxim
Explain trivial dependency? Functional dependency of the form α ->β. is trivial if α C β. Trivial functional dependencies are satisfied by all the relations.
why we fregment at all?
What is schema
What are the requirements to ensure the objectives of file management principle is realized?
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