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Q41. Examine the current value for the following parameters in your database instance:

SGA_MAX_SIZE = 1024M 

SGA_TARGET = 700M 

DB_8K_CACHE_SIZE = 124M 

LOG_BUFFER = 200M

You issue the following command to increase the value of DB_8K_CACHE_SIZE: 

SQL> ALTER SYSTEM SET DB_8K_CACHE_SIZE=140M;

Which statement is true?

A. It fails because the DB_8K_CACHE_SIZE parameter cannot be changed dynamically.

B. It succeeds only if memory is available from the autotuned components if SGA. 

C. It fails because an increase in DB_8K_CACHE_SIZE cannot be accommodated within SGA_TARGET.

D. It fails because an increase in DB_8K_CACHE_SIZE cannot be accommodated within SGA_MAX_SIZE.

Answer: D


Q42. Examine the parameter for your database instance:

You generated the execution plan for the following query in the plan table and noticed that the nested loop join was done. After actual execution of the query, you notice that the hash join was done in the execution plan:

Identify the reason why the optimizer chose different execution plans.

A. The optimizer used a dynamic plan for the query.

B. The optimizer chose different plans because automatic dynamic sampling was enabled. 

C. The optimizer used re-optimization cardinality feedback for the query.

D. The optimizer chose different plan because extended statistics were created for the columns used. 

Answer: B


Q43. In your multitenant container database (CDB) containing pluggable database (PDBs), the HR user executes the following commands to create and grant privileges on a procedure:

CREATE OR REPLACE PROCEDURE create_test_v (v_emp_id NUMBER, v_ename

VARCHAR2, v_SALARY NUMBER, v_dept_id NUMBER)

BEGIN

INSERT INTO hr.test VALUES (V_emp_id, V_ename, V_salary, V_dept_id); 

END;

/

GRANT EXECUTE ON CREATE_TEST TO john, jim, smith, king;

How can you prevent users having the EXECUTE privilege on the CREATE_TEST procedure from inserting values into tables on which they do not have any privileges?

A. Create the CREATE_TEST procedure with definer’s rights.

B. Grant the EXECUTE privilege to users with GRANT OPTION on the CREATE_TEST procedure.

C. Create the CREATE_TEST procedure with invoker’s rights.

D. Create the CREATE_TEST procedure as part of a package and grant users the EXECUTE privilege the package.

Answer: C


Q44. To enable the Database Smart Flash Cache, you configure the following parameters:

DB_FLASH_CACHE_FILE = ‘/dev/flash_device_1’ , ‘/dev/flash_device_2’ 

DB_FLASH_CACHE_SIZE=64G

What is the result when you start up the database instance?

A. It results in an error because these parameter settings are invalid. 

B. One 64G flash cache file will be used. 

C. Two 64G flash cache files will be used. 

D. Two 32G flash cache files will be used. 

Answer: A


Q45. You plan to use the In Database Archiving feature of Oracle Database 12c, and store rows that are inactive for over three months, in Hybrid Columnar Compressed (HCC) format.

Which three storage options support the use of HCC?

A. ASM disk groups with ASM disks consisting of Exadata Grid Disks.

B. ASM disk groups with ASM disks consisting of LUNS on any Storage Area Network array

C. ASM disk groups with ASM disks consisting of any zero padded NFS-mounted files

D. Database files stored in ZFS and accessed using conventional NFS mounts.

E. Database files stored in ZFS and accessed using the Oracle Direct NFS feature

F. Database files stored in any file system and accessed using the Oracle Direct NFS feature

G. ASM disk groups with ASM disks consisting of LUNs on Pillar Axiom Storage arrays

Answer: AEG


Q46. In your multitenant container database (CDB) containing pluggable database (PDBs), you granted the CREATE TABLE privilege to the common user C # # A_ADMIN in root and all PDBs. You execute the following command from the root container:

SQL > REVOKE create table FROM C # # A_ADMIN; 

What is the result?

A. It executes successfully and the CREATE TABLE privilege is revoked from C # # A_ADMIN in root only.

B. It fails and reports an error because the CONTAINER=ALL clause is not used. 

C. It excludes successfully and the CREATE TABLE privilege is revoked from C # # A_ADMIN in root and all PDBs.

D. It fails and reports an error because the CONTAINER=CURRENT clause is not used. 

E. It executes successfully and the CREATE TABLE privilege is revoked from C # # A_ADMIN in all PDBs.

Answer: A


Q47. You use a recovery catalog for maintaining your database backups.

You execute the following command:

$rman TARGET / CATALOG rman / cat@catdb

RMAN > BACKUP VALIDATE DATABASE ARCHIVELOG ALL;

Which two statements are true?

A. Corrupted blocks, if any, are repaired. 

B. Checks are performed for physical corruptions.

C. Checks are performed for logical corruptions.

D. Checks are performed to confirm whether all database files exist in correct locations

E. Backup sets containing both data files and archive logs are created. 

Answer: BD


Q48. Which statement is true about Enterprise Manager (EM) express in Oracle Database 12c?

A. By default, EM express is available for a database after database creation.

B. You can use EM express to manage multiple databases running on the same server.

C. You can perform basic administrative tasks for pluggable databases by using the EM express interface.

D. You cannot start up or shut down a database Instance by using EM express.

E. You can create and configure pluggable databases by using EM express.

Answer: D


Q49. Examine the following command:

ALTER SYSTEM SET enable_ddl_logging=FALSE; 

Which statement is true?

A. None of the data definition language (DDL) statements are logged in the trace file.

B. Only DDL commands that resulted in errors are logged in the alert log file.

C. A new log.xml file that contains the DDL statements is created, and the DDL command details are removed from the alert log file.

D. Only DDL commands that resulted in the creation of new database files are logged. 

Answer: A


Q50. You want to capture column group usage and gather extended statistics for better cardinality estimates for the CUSTOMERS table in the SH schema. 

Examine the following steps:

1.Issue the SELECT DBMS_STATS.CREATE_EXTENDED_STATS (‘SH’, ‘CUSTOMERS’) FROM dual statement.

2.Execute the DBMS_STATS.SEED_COL_USAGE (null, ‘SH’, 500) procedure.

3.Execute the required queries on the CUSTOMERS table.

4.Issue the SELECT DBMS_STATS.REPORT_COL_USAGE (‘SH’, ‘CUSTOMERS’) FROM dual statement.

Identify the correct sequence of steps.

A. 3, 2, 1, 4

B. 2, 3, 4, 1

C. 4, 1, 3, 2

D. 3, 2, 4, 1

Answer: B