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1. Which of the following represents a collection of concepts that are used to
describe the structure to describe the structure of a data base?
a) Data warehouse
b) Data model
c) Data structure
d) Data type
2. Which of the following data model is more flexible?
a) Network data model
b) Hierarchical data model
c) Relational data model
d) Object data model
3. Which of the following type of file require largest processing time?
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