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Introduction to Database System

Introduction to Database System
Prior to 1970, all data was stored in separate files, which were mostly stored on reels of magnetic tape.

True
False

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Introduction to Database System
A scheme describes

All of these
None of these
records and files
record relationships
data elements

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Introduction to Database System
The Management Information system (MIS) structure with one main computer system is called a

decentralized MIS structure
centralized MIS structure
distributed MIS structure
hierarchical MIS structure

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Introduction to Database System
A top-to-bottom relationship among the items in a database is established by a

Hierarchical schema
Network schema
All of the listed here
Relational schema

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Introduction to Database System
Which of the following products was the first to implement true relational algebra in a PC DBMS?

R:base
IDMS
Oracle
dBase-II

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Introduction to Database System
Which of the following is NOT a basic element of all versions of the E-R model?

Entities
Relationships
Attributes
Primary keys

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