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System error:These contain errors in database system or the OS, example, deadlocks.Such errors are fairly hard to detect and need reprogramming the erroneous components of the system software.
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Define a property that is not a property of transactions? Ans: Concurrency is not a property of transactions
What is meant by mean time to failure? The mean time to failure is the amount of time that the system could run continuously without failure.
Question: (a) Can a set of data requirements be correctly modelled by two or more different ER diagrams? Explain your answer. You may use a small example, if you think it will
Components of database manager The above functions are reached by the database manager. The major elements of a database manager are: Authorisation control: This mod
Illustrate the view of software architecture A model is a semantically closed abstraction of system composes of elements. It can be visualized using any of the following five v
Explain the Static or conservative Two Phase Locking: Static (or conservative) Two Phase Locking: In this type of scheme, all the data items are locked earlier than any opera
Depending upon the rules we have found, we can classify the locks into two types. Shared Lock: A transaction might be acquiring shared lock on a data item in order to read it
Write a query to define tables students and teachers as sub tables of people? Create table students of student under people Create table teachers of teacher under people
a need some real life examples of database management systems three level of ANSI SPARC architecture life teacher and student ,company and employee or for NGO etc.
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