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Define raid? Briefly explain it?
A range of disk organization methods, collectively called redundant arrays of independent disks (RAID)
o Improvement of reliability through redundancy.
o Improvement in performance thorugh parallelism
1. Bit level striping
2. Block level striping
RAID levels
Define the terms i) DDL ii) DML DDL: Data base schema is specified by a set of definitions expressed by a special language known as a data def
Define check point and its impact on data base recovery. Ans: There could be hundreds of transactions handled per minute, in a large on-line database system.
Lost Updates : Suppose the two transactions T3 and T4 run simultaneously and they happen to be interleaved in the following way (suppose the initial value of X as 10000):
how can apply joins on table
HOW TO SOLVE THE LP Problems by simplex method?z=x1+-3x2+2x3
Consider the relation PERSON. If you want to display details of persons having age less than or equal to 30 than the select operation will be used as follows: σ AGE The resu
Develop C# schoolproject ASAP Helping me with schoolproject. The project is prepared in C# and haves a database connection. We have some small issues asking up data from t
Performance of Various Concurrency Control Mechanisms
Write short notes on domain relational calculus The domain relational calculus uses domain variables that take on values from an attribute domain rather than values for whole t
What is the archtetype/instance pattern? The archetype/instance pattern happens when one entity tracks occurrences of another entity. A common example is the relationship among
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