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Replies to This Discussion

1. in “many to many relationship” one instance of first entity can be mapped with many instances of second entity




2. Select the most appropriate statement. Which of the following data model is used to design logical database design?



Object oriented

Any model can be used

3. In “One to Many” cardinality one instance of a relation is mapped with

many instances of second entity type

One instance of second entity type

Primary key of 2 relations

none of above

4. Select” and “project” are the examples of

Unary operations

Binary operations

Ternary operations

All of above

5. Binary relationships are those, which are established betweenOne entity type

One entity type

Two entity type

Three entity type

Unlimited entities

6. Unary operations involves

Only one relation

Only two relations

More than two relations

Not more than five relations

7. Which of the following is true regarding foreign keys?

There can only be one foreign key in a relation

There can be as many foreign keys as needed

Foreign key is not a super key

Each table in database must have a foreign key


please share your quizez


Meeral 1st 2 files kon se program me open hoge? plz tell me

word me hain sari

word me to hy but version kon sa?


ok thanks.....

Office 2003 docx file support nhi krta upgrade your office to any newer version.

the answer of question 4 is Binary operations 

the answer of 3rd question is many instances of second entity type

the answer of 1st question is True

as many foreign keys as needed


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