1Z0-062 Oracle Exam Questions and Free Practice Test

Question 43

Examine the query and its output:
1Z0-062 dumps exhibit
What might have caused three of the alerts to disappear?

A. The threshold alerts were cleared and transferred to DBA_ALERT_HISTORY.

B. An Automatic Workload Repository (AWR) snapshot was taken before the execution of the second query.

C. An Automatic Database Diagnostic Monitor (ADOM) report was generated before the execution of the second query.

D. The database instance was restarted before the execution of the second quer

Correct Answer:D

Question 44

The HR user owns the BONUSES table. HR grants privileges to the user TOM by using the command: SQL> GRANT SELECT ON bonuses TO tom WITH GRANT OPTION;
TOM then executes this command to grant privileges to the user JIM: SQL> GRANT SELET ON hr.bonuses TO jim; Which statement is true?

A. TOM cannot revoke the SELECT ON HR.BONUSES privilege from JIM.

B. HR can revoke the SELECT ON HR.BONUSES privilege from JIM.

C. JIM can grant the SELECT ON HR.BONUSES privilege to other users, but cannot revoke the privilege from them.

D. HR can revoke the SELECT ON HR.BONUSES privilege from TOM, which will automatically revoke the SELECT ON HR.BONUSES privilege from JIM.

Correct Answer:D

Question 45

Your database supports a DSS workload that involves the execution of complex queries: Currently, the library cache contains the ideal workload for analysis. You want to analyze some of the queries for an application that are cached in the library cache.
What must you do to receive recommendations about the efficient use of indexes and materialized views to improve query performance?

A. Create a SQL Tuning Set (STS) that contains the queries cached in the library cache and run the SQL Tuning Advisor (STA) on the workload captured in the STS.

B. Run the Automatic Workload Repository Monitor (ADDM).

C. Create an STS that contains the queries cached in the library cache and run the SQL Performance Analyzer (SPA) on the workload captured in the STS.

D. Create an STS that contains the queries cached in the library cache and run the SQL Access Advisor on the workload captured in the STS.

Correct Answer:D
* SQL Access Advisor is primarily responsible for making schema modification recommendations, such as adding or dropping indexes and materialized views. SQL Tuning Advisor makes other types of recommendations, such as creating SQL profiles and restructuring SQL statements.
* The query optimizer can also help you tune SQL statements. By using SQL Tuning Advisor and SQL
Access Advisor, you can invoke the query optimizer in advisory mode to examine a SQL statement or set of statements and determine how to improve their efficiency. SQL Tuning Advisor and SQL Access Advisor can make various recommendations, such as creating SQL profiles, restructuring SQL statements, creating additional indexes or materialized views, and refreshing optimizer statistics.
Note:
* Decision support system (DSS) workload
* The library cache is a shared pool memory structure that stores executable SQL and PL/SQL code. This cache contains the shared SQL and PL/SQL areas and control structures such as locks and library cache handles.

Question 46

Which three statements are true about Automatic Workload Repository (AWR)? (Choose three.)

A. All AWR tables belong to the SYSTEM schema.

B. The AWR data is stored in memory and in the database.

C. The snapshots collected by AWR are used by the self-tuning components in the database

D. AWR computes time model statistics based on time usage for activities, which are displayed in the v$SYS time model and V$SESS_TIME_MODEL views.

E. AWR contains system wide tracing and logging information.

Correct Answer:BCD

Question 47

A database is open READ WRITE and the instance has multiple sessions some of which have active transactions.
You execute this command:
SQL> ALTER SYSTEM ENABLE RESTRICTED SESSION;
Which three are true about the active transactions? (Choose three.)

A. They may issue COMMIT OR ROLLBACK statements

B. They are suspended and unable to issue any statements

C. They may continue to issue DML statements

D. They are rolled back automatically

E. They may continue to issue queries

F. They are terminated immediately

Correct Answer:BDF

Question 48

Which four statements are true about database instance behavior? (Choose four.)

A. An idle instance is created when a STARTUP NOMOUNT is successful

B. All dynamic performance views (v$ views) return data when queried from a session connected to an instance in NOMOUNT state

C. The consistency of redo logs and data files is checked when mounting the database

D. Redo log files can be renamed in MOUNT state

E. An SPFILE can be updated when connected to an idle instance

F. Datafiles can be renamed in MOUNT state

Correct Answer:CDEF

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