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IBM DBMS Quiz-1

Question 1

Time: 00:00:00
When a primary key is define in the table, DBMS automatically creates a ____ on a primary key column.

Unique index

Unique index

Sequence

Sequence

Trigger

Trigger

Synonym

Synonym

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Question 2

Time: 00:00:00
Which normal form is the partial dependency removed?

First

First

Second

Second

Third

Third

BCNF

BCNF

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Question 3

Time: 00:00:00
An attribute or combination of attributes in one table whose values must either match the primary key in another table or be null is called __________.

Secondary Key

Secondary Key

Super key

Super key

Candidate Key

Candidate Key

Foreign Key

Foreign Key

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Question 4

Time: 00:00:00
A transaction state changes from active to______, after the transaction has been rolled back and the database restored to its state prior to the start of the transaction.

Partially committed

Partially committed

Committed

Committed

Aborted

Aborted

Failed

Failed

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Question 5

Time: 00:00:00
The way a particular application views the data from the database that the application uses is a

Module.

Module.

Relational model.

Relational model.

Schema.

Schema.

Sub schema.

Sub schema.

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Question 6

Time: 00:00:00
Which of the operations constitute a basic set of operations for manipulating relational data?

Predicate calculus

Predicate calculus

Relational calculus

Relational calculus

Relational algebra

Relational algebra

None of the above

None of the above

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Question 7

Time: 00:00:00
Which-one of the following statements about normal forms is FALSE?

BCNF is stricter than 3 NF

BCNF is stricter than 3 NF

Lossless, dependency -preserving decomposition into 3 NF is always possible

Lossless, dependency -preserving decomposition into 3 NF is always possible

Loss less, dependency – preserving decomposition into BCNF is always possible

Loss less, dependency – preserving decomposition into BCNF is always possible

Any relation with two attributes is BCNF

Any relation with two attributes is BCNF

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Question 8

Time: 00:00:00
Which is a bottom-up approach to database design that design by examining the relationship between attributes:

Functional dependency

Functional dependency

Database modeling

Database modeling

Normalization

Normalization

Decomposition

Decomposition

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Question 9

Time: 00:00:00
Which forms has a relation that possesses data about an individual entity:

2NF

2NF

3NF

3NF

4NF

4NF

5NF

5NF

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Question 10

Time: 00:00:00
Which command allows the user to change multiple fields?

Modify

Modify

Lookup

Lookup

Update

Update

Change

Change

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