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Explain Interblock gap?
Interblock Gap - A track of a disk is separated into equal-sized disk blocks. Blocks are separated through fixed-size gaps, called as interblock gaps that involve specially coded control information written during in the disk initialization.
explain exhausitively the problems associated with er diagrams with ellustrations
What is an entity relationship model? The entity relationship model is a collection of basic objects known as entities and relationship between those objects. An
Differentiate between a subquery and a join If we need to acquire information from one or more tables after that either subquery or join can be used. If the columns which are t
What are domain constraints? A domain is a set of values that might be assigned to an attribute .all values that appear in a column of a relation must be taken fro
how to data store?
usecase diagram,activity diagraM,SEQUENCE DIAGRAM
Haw does it work one database application
What are the time stamps associated with each data item? W-timestamp (Q) denotes the largest time stamp if any transaction that implemented WRITE (Q) successfully. R-timesta
Types of data independence Data independence can be classified into the following two types: Physical Data Independence: This means that for any change made in the physi
The data of a view is not physically stored, but derived from one or more tables. True the data of a view is not physically stored
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