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Question ID 1662

Which two statements about sequences are true? (Choose two.)

Option A

A.    You use a CURRVAL pseudo column to generate a value from a sequence that would be used for a specified database column.
 

Option B

B.    You use a CURRVAL pseudo column to look at the current value just generated from a sequence, without affecting the further values to be generated from the sequence.
 

Option C

C.    You use a NEXTVAL pseudo column to obtain the next possible value from a sequence by actually retrieving the value from the sequence.
 

Option D

D.    You use a NEXTVAL pseudo column to look at the next possible value that would be generated from a sequence, without actually retrieving the value.
 

Option E

E.    You use a REUSE clause when creating a sequence to restart the sequence once it generates the maximum value defined for the sequence.
 

Option F

F.    If a sequence starting from a value 100 and incremented by 1 is used by more than one application, then all of these applications could have a value of 105 assigned to their column whose value is being generated by the sequence.
 

Correct Answer B,C
Explanation


Question ID 1663

In which two cases would you use an outer join? (Choose two.)

Option A

A.    Only when the tables have a primary key-foreign key relationship.
 

Option B

B.    The tables being joined have NOT NULL columns.
 

Option C

C.    The tables being joined have both matched and unmatched data.
 

Option D

D.    The columns being joined have NULL values.

 

Option E

E.    The tables being joined have only matched data.

Correct Answer C,D
Explanation

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