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What is object identity?
An object retains its identity even if some or all the values of variables or explanations of methods change overtime.
What is B-Tree? A B-tree eliminates the redundant storage of search-key values .It permits search key values to appear only once.
#question benefits and limitations of data models..
Explain concept of inheritance with support of suitable example. Inheritance Inheritance is one of milestone of object-oriented programming language as it allows a creati
What is known as a search key? An attribute or set of attributes used to look up records in a file is known as a search key.
My cut off date is very soon in a Database subject and i dont know how to solve anything in it
What is a data dictionary? A data dictionary is a data structure which keeps Meta data about the structure of the database i.e. the schema of the database.
why are older data base model are being replaced by new data model
Explain the Static or conservative Two Phase Locking: Static (or conservative) Two Phase Locking: In this type of scheme, all the data items are locked earlier than any opera
To do the division operation R1 ÷ R2, R2 should be a correct subset of R1. In the following example R1 have attributes A and B and R2 have only attribute B so R2 is a correct subse
Write short notes on relational model The relational model uses a collection of tables to show both data and the relationships between those data. The relational mo
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