cs403

[Muhammad Zulqurnain]

A O A

[+ M.Tariq Malik]

 

 

CS-403 2^nd Quiz

 

 

Question # 1 of 5 ( Start time: 03:01:30 PM )  Total Marks: 1 

Which of the following is a feature of CHECK constraint? 

Select correct option: 

 

 limit the values that can be placed in a column.

 used to enforce referential integrity.

 enforces the uniqueness of the values in a set of columns.

 is a unique identifier for a row within a database table.  Not sure (pg 205)

 

The check constraint checks the values for any particular attribute. In this way

different types of constraints can be enforced in any table by CREATE command.

Question # 2 of 5

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

Select correct option: 

  many instances of second entity type

 One instance of second entity type

 Primary key of 2 relations

 none of above 

 

Question # 3 of 5 ( Start time: 03:03:55 PM )  Total Marks: 1 

Which of the following constraints enforces entity integrity? 

Select correct option: 

 

 PRIMARY KEY

 FOREIGN KEY

 CHECK

 NOT NULL

Question # 4 of 5

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

 

     true

    false

Question # 5 of 5 ( Start time: 03:06:03 PM )  Total Marks: 1 

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

Select correct option: 

 

 true

 false

 

[+ M.Tariq Malik]

Muhammad Zulqurnain thanks

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