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What are the responsibility of File manager?
File Manager : Manager allocation of space on disk storage and the data structures used to represent within stored on disk. It is also responsible for - - Locating block of target record - Requesting block from disk Manager - Transmitting required record to data Manager This file Manager can be implemented using an interface to the existing file subsystem provided through the O.S. of the host computer or it can involved a file subsystem written especially for DBMS.
losers with new information systems
The issues relating to the Design of the Physical Database Files Physical File is a file as stored on the disk. The major issues relating to physical files are: • Cons
what is un ordered and ordered file managment?
what is stracture of dabms
Distributed Database Management System
Define deadlock avoidance. An alternative method for avoiding deadlocks is to needs additional information about how resources are to be requested. Each request requires the s
What is a view? How it is related to data independence? A view might be thought of as a virtual table, that is, a table that does not really exist in its own right but is inste
The result of the UNION operation between R1 and R2 is a relation that includes? The result of the operation between R1 and R2 includes all the tuples of R1 and R2 which have c
What is the purpose of storage manager? The storage manager is responsible for the following a) Interaction with the file manager b) Translation of DML commands in to low
Representing complex relationship among data A database may contain varieties of data interrelated to each other in numerous ways. A DBMS must have the capability to represent
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