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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.
List the drawbacks of relational database system A) Repetition of data B) Inability to s certain information.
What are axioms? Axioms or rules of inference give a simpler technique for reasoning about
Boyce-Code Normal Form (BCNF) A relationship is said to be in BCNF if it is already in 3NF and the left hand side of each dependency is a candidate key. A relation who is in 3N
What is the meaning of Data independence? Data independence means a programs that are not dependent on the physical attributes of data and a programs that are not dependent on
Aggregate functions Some of these functions are min, count, max, and avg. These functions help in getting consolidated information from a set of tuples. Example:
complete assignment on the above title.
Types of Data fragmentation
System Design: An Object Oriented Approach Any software systems always try to change and evolve as technology and business rules evolve. The development of information systems
Type of views : Simple views and Difficult Views Feature Simple Views Complex Views Number of tables One
The physical location of a record is determined by which mathematical formula that transforms a file key into a record location? The physical location of a record is determined
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