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Define Deadlock avoidance
These protocols as well ensure that the system will never enter a deadlock state although the way it is done is different from deadlock prevention. In this way whenever a transaction requests for some data, the system refer the resources currently allocated to each procedure and the future requests and releases of each process currently allocated to each procedures and the future requests and releases of every process, to decide whether the current request can be satisfied or should wait to prevent a possible future deadlock. In this the transactions must give additional information about how in future the data will be requested.
Explain TPS concurreny executions stating their advantages in online business advancement
What are the different strategies of implementation of the Statecharts? There are two strategies for implementation of state charts: i) Basic Implementation Strategy
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
why shadow copy technique is used?
Define tuple variable? Tuple variables are used for comparing two tuples in the same relation. The tuple variables are explained in the from clause by way of the as clause.
The advantages of a database management system (DBMS) include :- Data integrity and elimination of duplication.
Differentiate between horizontal & mixed horizontal fragmentation?
Can a filed occur in several field groups. Yes. But it leads to redundant data redundancy.
Example - ALTER TABLE emp MODIFY (empno NUMBER (7));
Which method is used to key transformation ? A hash method is used to key transformation.
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