Oracle 9i DBA 1Z0-035

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Oracle9i dba new features for Oracle7.3 and Oracle9 ocps Sample Questions:

1. Oracle9i extends the cursor sharing functionality with the new value of SIMILAR for the CURSOR_SHARING parameter. With CURSOR_SHARING = SIMILAR, cursors are shared for safe literals only.
What is meant by 'safe literals only'?

A) The substitution of any literal value will produce exactly the same execution plan.
B) The substitution of a literal value will produce different execution plans.
C) No literal value is substituted for a shared cursor.
D) Different execution plans are generated for substituted literal values.

2. What does fine-grained access enable you to do?

A) select which user's privilege map is used during execution
B) associate policies with tables and views
C) choose the schema in which a stored PL/SQL block will execute in
D) select how external object references are resolved in queries

3. What happens during a complete refresh of a materialized view?

A) The materialized view is truncated or deleted and repopulated by re-executing the materialized view query.
B) The materialized view is dropped and recreated.
C) Changes in the materialized view are applied to the underlying table.
D) Changes captured in the materialized view log are applied to the materialized view.

4. Examine this fragment from a SQL*Plus session:
SQL> SELECT name, value FROM v$sysstat 2> WHERE name LIKE 'work area executions%';
NAME VALUE
work area executions - optimal 1544 work area executions - onepass 11 work area executions - multipass 1038
What can you conclude about the setting of the PGA_AGGREGATE_TARGET initialization parameter?

A) You cannot conclude anything because these statistics are not related to the PGA_AGGREGATE_TARGET parameter.
B) It is probably at its optimal setting because the ratio of one pass to multipass work area executions is below 0.10 (ten percent).
C) It may be set too high because there are many more multipass work area executions than one pass executions.
D) It may be set too low because there are many more multipass work area executions than one pass executions.

5. Consider this syntax:
MERGE INTO t1
USING t2 ON (join predicate).
What does the MERGE syntax do?

A) It creates a Cartesian product of table T1 and table T2 for all columns that have the same name.
B) For each row from T2, it updates the row if it exists within table T1, otherwise it inserts the row into T1.
C) It creates a natural join of tables T1 and T2 for all columns that have the same name.
D) It performs a merge join of the row from T2 only if it doesn't exist in the T1 table.

Solutions:

Question # 1 Answer: A

Question # 2 Answer: B

Question # 3 Answer: A

Question # 4 Answer: D

Question # 5 Answer: B