QUESTION: 1

Select two suitable statements regarding the following SQL statement:
CREATE TRIGGER trigger_1 AFTER UPDATE ON sales FOR EACH ROW EXECUTE PROCEDURE write_log();

It is defining a trigger "trigger_1".
Every time 'UPDATE' is executed on the "sales" table, the "write_log" function is called once.
The "write_log" function is called before 'UPDATE' takes place.
'UPDATE' is not executed if "write_log" returns NULL.
'DROP TRIGGER trigger_1 ON sales;' deletes the defined trigger.

Answer(s): A,E

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QUESTION: 2

Select two transaction isolation levels supported in PostgreSQL.

DIRTY READ
READ COMMITTED
REPEATABLE READ
PHANTOM READ
SERIALIZABLE

Answer(s): B,E

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QUESTION: 3

PostgreSQL can use an index to access a table. Select two incorrect statements about indexes.

An index is created by 'CREATE INDEX', and deleted by 'DROP INDEX'.
By using an index effectively, searching and sorting performs faster.
There are B-tree, Hash, R-tree and GiST index types.
By creating an index, performance always improves.
Creating an unused index does not affect the performance of a database at all.

Answer(s): D,E

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QUESTION: 4

Select two incorrect statements regarding 'DOMAIN'.

When defining a domain, you can add a default value and constraints to the original data.
Domain is a namespace existing between databases and objects such as tables.
A domain is created by 'CREATE DOMAIN'.
A domain can be used as a column type when defining a table.
To define a domain, both input and output functions are required.

Answer(s): B,E

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Free Postgresql PGCES-02 Exam Questions (page: 2)

Pass your PGCES-02 PostgreSQL CE 8 Silver exam with these free Actual Questions and Answers

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