Database Architecture & Modeling - Database Management System Objective Questions and Answers

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Questions
41 The data dictionary tells the DBMS :
A What files are in the database
B What attributes are possessed by the data
C What these files contain
D All of the above

Answer: Option [D]
42 An association between students and courses is :
A 1:1 relationship
B 1:M relationship
C M:M relationship
D None of these

Answer: Option [C]
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43 The database environment has all of the following components except :
A users
B separate files
C database
D database administrator

Answer: Option [B]
44 The key to a cost-effective data input operation is :
A OCR equipment
B validity checks
C validation
D employee motivation

Answer: Option [D]
45 Complex entities can be constructed using the following operation :
A SUM
B Union
C Aggregation
D Collection

Answer: Option [C]

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