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(a) Explain the three types of potential mistake which could occur if concurrency control is not properly enforced in the database system. Support your answer with appropriate example for each.
(b) Explain the data access protocol based on the compatibility matrix.
(c) Describe "deadlock" and give an example.
(d) Describe how a deadlock state can be detected and how the system can break such a state.
Niles Video Inc. wants to create a website for online sales of movies (DVD and videotapes). People will be allowed to register as customers on the website and to update their store
Define an operator that a Relational Algebra does not have Ans: Relational Algebra does not have Aggregation operators.
HOW TO SOLVE THE LP Problems by simplex method?z=x1+-3x2+2x3
For the question given below, you are required to submit design and implementation documentation as described over the page. Design, implement (in Java), test and document a set of
ER diagram on cosmetics
Draw the precedence graph of the following schedule and determine whether the schedule is serializable. (Note that all instructions, except lock and unlock, are omitted. We assume
Assume that you are responsible for selecting a new DBMS product for Sohar Hospital
Can a stored procedure call itself or recursive stored procedure? How much level SP nesting is possible? Yes. Because Transact-SQL supports recursion, you can write kept proced
Given the following relations Vehicle (Reg_no, make, colour) Person(eno, name, address) Owner(eno, reg_no) Write expressions in the relational algebra to answer the following
Explain the Strategy of Database Planning ?
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