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Computer Science Set-1
Databases
66

Databases MCQ with Answers

66) Which of the following is record based logical model?

Network Model

Object oriented model

E-R Model

None of these

Answer is:

Network Model

Databases MCQ with Answers

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Related Databases MCQ with Answers

68) A file manipulation command that extracts some of the records from a file is called

SELECT

PROJECT

JOIN

PRODUCT

Answer is:

SELECT

69) A primary key is combined with a foreign key creates

Parent-Child relationship between the tables that connect them

Many to many relationship between the tables that connect them.

Network model between the tables that connect them.

None of the above

Answer is:

Parent-Child relationship between the tables that connect them

70) In E-R Diagram derived attribute are represented by

Ellipse

Dashed ellipse

Rectangle

Triangle

Answer is:

Dashed ellipse

71) Cross Product is a:

Unary Operator

Ternary Operator

Binary Operator

Not an operator

Answer is:

Binary Operator

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