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What is data model? Explain object based and record based data models?
Ans: A data model is an abstract model in which describes how data is represented and accessed.
(i) Object based data models: Same to a relational database model, but objects, classes and inheritance are directly supported within database schemas and in the query language
(ii) Record based data models: is a database model based on first-order predicate logic. Its core idea is to elaborate a database as a collection of predicates over a finite set of predicate variables, describing constraints on the possible values and combinations of values.
What is transaction? Transaction is a unit of program implementation that accesses and possibly updated several data items.
What is first normal form? The domain of attribute must contain only atomic (simple, indivisible) values.
online eductional management system ke diagram
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how to prepare a data dictionary for online examination system for certified courses?
What is B-Tree? A B-tree eliminates the redundant storage of search-key values .It permits search key values to appear only once.
Why a report generator is used ? Report generator is used for print files on paper.
3. (10 points) Assume that you have been presented with the following relation for the Baxter Aviation database: Charters (Pilot#, Pilot name, Aircraft ID#, #seats, Village, Fligh
What is ICR? A. ICR (Intelligent Character Recognition) is a technology that gives scanning and imaging systems the ability to identify images of hand-printed or script charact
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