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Explain controlled redundancy?
Controlled redundancy : The replication of data within the data warehouse for the purposes of improved data access or understand ability.
Single Valued Normalisation Codd in the year 1972 formed three normal forms (1NF, 2NF, and 3NF). These were based on functional dependencies between the attributes of a relati
Query Processor The query language processor is responsible for taking query language statements or shifting them from the English-like syntax of the query language to a form
Which sorting technique is used to sort databases, whose sizes are very big? Give one such algorithm. Why do sorting techniques like quicksort, insertion sort, etc. not applied
What is storage manager? A storage manager is a program module that gives the interface between the Low level data kept in a database and the application programs
What was the method in which records are physically stored in a specified order according to a key field in each record ? A method in which records are physically stored within
Exclusive lock It is asked for by a transaction on a data item that it wants to update. No other transaction can put either a shared lock or an exclusive lock on a dat
What are the factors to be taken into account when choosing a RAID level? A) Monetary cost of extra disk storage requirements. B) Performance requirements in terms of number
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Explain how the associations are implemented as classes. A general approach in this case is to transform an association class into a simple class linked to two original classes
What do you understand by transitive dependencies? Define with an example any two problems that can take place in the database if transitive dependencies are available in the datab
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