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NEW QUESTION 51
Identify three scenarios in which you would recommend the use of SQL Performance Analyzer to analyze impact on the performance of SQL statements.
- A. Migration of database storage from non-ASM to ASM storage
- B. Change in your network infrastructure
- C. Change in the Oracle Database version
- D. Database and operating system upgrade
- E. Change in the hardware configuration of the database server
Answer: C,D,E
Explanation:
Explanation/Reference:
Explanation:
Oracle 11g/12c makes further use of SQL tuning sets with the SQL Performance Analyzer, which compares the performance of the statements in a tuning set before and after a database change. The database change can be as major or minor as you like, such as:
* (E) Database, operating system, or hardware upgrades.
* (A,C) Database, operating system, or hardware configuration changes.
* Database initialization parameter changes.
* Schema changes, such as adding indexes or materialized views.
* Refreshing optimizer statistics.
* Creating or changing SQL profiles.
NEW QUESTION 52
Your database instance has Automatic Memory Management enabled and supports shared server connections.
Examine the following:
1. Parallel execution messages and control structures
2. Local variables for a process
3. Security and resource usage information
4. Runtime memory values, such as rows retrieved for a SQL statement using a serial execution plan
5. SQL execution work areas
Which option indicates what is allocated from the large pool in this instance?
- A. 1, 2, 3, and 5
- B. 1, 2, and 5
- C. 1, 2, and 4
- D. only 1
Answer: C
NEW QUESTION 53
You install Oracle Grid Infrastructure for a standalone server.
Which two components are automatically included in the Oracle Restart configuration? (Choose two.)
- A. A pre-existing Oracle Net Listener
- B. Oracle Notification services
- C. A pre-existing Oracle management agent
- D. A pre-existing database
- E. Oracle CSSDservice
Answer: B,E
Explanation:
Explanation/Reference:
References: https://docs.oracle.com/database/121/LADBI/oraclerestart.htm#LADBI999
NEW QUESTION 54
You use the segment advisor to help determine objects for which space may be reclaimed.
Which three statements are true about the advisor given by the segment advisor?
- A. It may advise the use of online table redefinition for tables in dictionary managed tablespace.
- B. It may advise the use of segment shrink for free list managed tables.
- C. It will detect and advise about chained rows.
- D. It may advise the use of online table redefinition for tables in locally managed tablespaces
- E. It may advise the use of segment shrink for tables in dictionary managed tablespaces it the no chained rows.
Answer: A,B,C
Explanation:
The Segment Advisor generates the following types of advice:
* If the Segment Advisor determines that an object has a significant amount of free space, it recommends online segment shrink. If the objectis a table that is not eligible for shrinking, as in the case of a table in a tablespace without automatic segment space management, the Segment Advisor recommends online table redefinition (C).
* (D) If the Segment Advisor encounters a table with row chaining above a certain threshold, it records that fact that the table has an excess of chained rows.
NEW QUESTION 55
Your database instance is started by using a server parameter file (SPFILE). You execute the following command to
change the value of the LOG_BUFFER initialization parameter:
ALTER SYSTEM SET LOG_BUFFER=32 M;
What is the outcome of this command?
- A. The parameter value is changed and it comes into effect as soon as space becomes available in the SG
- B. It returns an error because the value of this parameter cannot be changed dynamically.
- C. It returns an error because SCOPE should be set to MEMORY.
- D. The parameter value is changed and it comes into effect at the next instance startup.
Answer: B
NEW QUESTION 56
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 all PDBs.
- B. It excludes successfully and the CREATE TABLE privilege is revoked from C # # A_ADMIN in root and all PDBs.
- C. It fails and reports an error because the CONTAINER=CURRENT clause is not used.
- D. It executes successfully and the CREATE TABLE privilege is revoked from C # # A_ADMIN in root only.
- E. It fails and reports an error because the CONTAINER=ALL clause is not used.
Answer: D
Explanation:
REVOKE ..FROM
If the current container is the root: / Specify CONTAINER = CURRENT to revoke a locally granted system privilege, object privilege, or role from a common user or common role. The privilege or role is revoked from the user or role only in the root. This clause does not revoke privileges granted with CONTAINER = ALL.
/ Specify CONTAINER = ALL to revoke a commonly granted system privilege, object privilege on a common object, or role from a common user or common role. The privilege or role is revoked from the user or role across the entire CDB. This clause can revoke only a privilege or role granted with CONTAINER = ALL from the specified common user or common role. This clause does not revoke privileges granted locally with CONTAINER = CURRENT. However, any locally granted privileges that depend on the commonly granted privilege being revoked are also revoked.
If you omit this clause, then CONTAINER = CURRENT is the default.
Reference: Oracle Database SQL Language Reference 12c, Revoke
NEW QUESTION 57
Which two statements are true concerning dropping a pluggable database (PDB)?
- A. The PDB must be open in read-only mode.
- B. The PDB data files are always removed from disk.
- C. The PDB must be in mount state.
- D. A dropped PDB can never be plugged back into a multitenant container database
(CDB). - E. The PDB must be unplugged.
Answer: C,E
Explanation:
http://docs.oracle.com/database/121/ADMIN/cdb_plug.htm#ADMIN13658
NEW QUESTION 58
You plan to install the Oracle Database 12c software on a new server. The database will use Automatic Storage Management (ASM) and Oracle Restart. Oracle Grid Infrastructure for a standalone server is already installed on the server.
You want to configure job role separation. You create the following operating system users and groups:
- The user oracle as the owner of the Oracle database installation
- The user gridas the owner of Oracle Grid Infrastructure
- The group oinstall as an Oracle Inventory group
- The group dbaas the OSDBAgroup for Oracle database
- The group asmdbaas the OSDBAgroup for Oracle ASM
- The group asmadminas the administration privileges group for Oracle ASM
- The group asmoper as the group for Oracle ASM
Which two additional tasks should you perform with regard to the OS-level owners and groups?
- A. creating a separate central inventory group for the Oracle Database 12c installation
- B. creating OS groups associated with the OSBACKUPDBA, OSDGDBA, and OSKMDBAsystem privileges
- C. assigning asmdba as the secondary group for the oracleuser
- D. assigning oinstallas the primary group for the oracleuser
- E. assigning asmadminand asmoper as primary groups for the oracleuser
Answer: B,D
NEW QUESTION 59
Which statement is true about redo log files during instance recovery?
- A. All redo log entries in the current and active logs are applied to data files to reconstruct changes made after the most recent checkpoint.
- B. All redo log entries in the current log are applied to data files until the checkpoint position is reached.
- C. All current, online, and archived redo logs are required to complete instance recovery.
- D. All current, active, and inactive redo logs are required to complete instance recovery.
Answer: B
Explanation:
Explanation
References https://docs.oracle.com/cd/A58617_01/server.804/a58396/ch2.htm
NEW QUESTION 60
Your multitenant container database has three pluggable databases (PDBs): PDB1, PDB2, and PDB3.
Which two RMAN commands may be; used to back up only the PDB1 pluggable database? (Choose two.)
- A. BACKUP DATABASE while connected to the PDB1 container
- B. BACKUP PLUGGABLE DATABASE PDB1 while connected to the root container
- C. BACKUP DATABASE while connected to the boot container
- D. BACKUP PLUGGABLE database PDB1 while connected to PDB2
- E. BACKUP PLUGGABLE DATABASE PDB1 while connected to the PDB1 container
Answer: A,B
Explanation:
Explanation
To perform operations on a single PDB, you can connect as target either to the root or directly to the PDB.
* (A) If you connect to the root, you must use the PLUGGABLE DATABASE syntax in your RMAN commands. For example, to back up a PDB, you use the BACKUP PLUGGABLE DATABASE command.
* (C)If instead you connect directly to a PDB, you can use the same commands that you would use when connecting to a non-CDB. For example, to back up a PDB, you would use the BACKUP DATABASE command.
References:
NEW QUESTION 61
You wish to enable an audit policy for all database users, except SYS, SYSTEM, and SCOTT.
You issue the following statements:
SQL> AUDIT POLICY ORA_DATABASE_PARAMETER EXCEPT SYS;
SQL> AUDIT POLICY ORA_DATABASE_PARAMETER EXCEPT SYSTEM;
SQL> AUDIT POLICY ORA_DATABASE_PARAMETER EXCEPT SCOTT;
For which database users is the audit policy now active?
- A. All users except SCOTT
- B. All users except sys and SCOTT
- C. All users except SYS
- D. All users except sys, system, and SCOTT
Answer: A
Explanation:
Explanation
If you run multiple AUDIT statements on the same unified audit policy but specify different EXCEPT users, then Oracle Database uses the last exception user list, not any of the users from the preceding lists. This means the effect of the earlier AUDIT POLICY ... EXCEPT statements are overridden by the latest AUDIT POLICY
... EXCEPT statement.
Note:
* The ORA_DATABASE_PARAMETER policy audits commonly used Oracle Database parameter settings.
By default, this policy is not enabled.
* You can use the keyword ALL to audit all actions. The following example shows how to audit all actions on the HR.EMPLOYEES table, except actions by user pmulligan.
Example Auditing All Actions on a Table
CREATE AUDIT POLICY all_actions_on_hr_emp_pol
ACTIONS ALL ON HR.EMPLOYEES;
AUDIT POLICY all_actions_on_hr_emp_pol EXCEPT pmulligan;
References:
NEW QUESTION 62
Which four statements are true about the components of the Oracle Scheduler? (Choose four.)
- A. A job is specified as part of a program specification.
- B. A program and schedule can be specified as part of a job definition.
- C. A scheduler job can point to a chain instead of pointing to a single program object.
- D. A program can be used in the definition of multiple jobs.
- E. A schedule can be specified to a single job only.
- F. A job may get started automatically when a window opens.
- G. A program and job can be specified as part of a schedule definition.
Answer: B,C,D,F
Explanation:
References:https://docs.oracle.com/cd/B19306_01/server.102/b14231/schedover.htm
NEW QUESTION 63
The ORCL database is configured to support shared server mode. You want to ensure that a user connecting remotely to the database instance has a one-to-one ratio between client and server processes.
Which connection method guarantees that this requirement is met?
- A. creating a service in the database by using the dbms_service.create_service procedure and using this service for creating a local naming service
- B. connecting by using the easy connect method
- C. connecting by using the local naming method with the server = dedicated parameter set in the tnsnames.ora file for the net service
- D. connecting by using an external naming method
- E. connecting by using a directory naming method
Answer: C
Explanation:
Explanation/Reference:
Explanation:
NEW QUESTION 64
Examine the parameters:
Users complain that their sessions for certain transactions hang. You investigate and discover that some users fail to complete their transactions, causing other transactions to wait on row-level locks.
Which two actions would you take to prevent this problem? (Choose two.)
- A. Set a limit in the proles of blocking users to control the number of data blocks that can be accessed in a session.
- B. Decrease the SESSIONS_PER_USER limit in the profiles assigned to blocking users.
- C. Use Database Resource Manager to automatically kill the sessions that are idle and are blocking other sessions.
- D. Increase the maximum number of ITL slots for segments on which a blocking user performs a transaction.
- E. Decrease the IDLE_TIME resource limit in the profiles assigned to blocking users.
Answer: B,C
NEW QUESTION 65
You run a script that completes successfully using SQL*Plus that performs these actions:
1. Creates a multitenant container database (CDB)
2. Plugs in three pluggable databases (PDBs)
3. Shuts down the CDB instance
4. Starts up the CDB instance using STARTUP OPEN READ WRITE
Which two statements are true about the outcome after running the script?
- A. The PDBs will be opened read/write.
- B. The other PDBs will be opened read-only.
- C. The seed will be opened read/write.
- D. The seed will be opened read-only.
- E. The other PDBs will be in mount state.
- F. The seed will be in mount state.
Answer: D,E
Explanation:
Explanation/Reference:
Explanation:
B: The seed is always read-only.
D: Pluggable databases can be started and stopped using SQL*Plus commands or the ALTER PLUGGABLE DATABASE command.
NEW QUESTION 66
Identify three situations in which messages are written to the alert log file. (Choose three.)
- A. Inserting a value into a table returns "ORA-00001: unique constraint (SYS.PK_XXXX) violated"
- B. Rebuilding an index using ALTER INDEX ... REBUILD fails with an error "ORA-01578: ORACLE data block corrupted (file # 14, block # 50)"
- C. Creating a table returns "ORA-00955: name is already in used by an existing object"
- D. Inserting a value into a table returns "ORA-01722: invalid number"
- E. Updating a record in a table returns "ORA-00060: deadlock detected while waiting for resource"
- F. Running a query on a table returns "ORA-01578: ORACLE data block corrupted (file # 4, block # 131)"
Answer: B,E,F
Explanation:
Explanation
NEW QUESTION 67
Examine the parameters for a database instance:
Your database has three undo tablespaces and the default undo tablespace is not autoextensible.
Resumable space allocation is not enabled for any sessions in the database instance.
What is the effect on new transactions when all undo space in the default undo tablespace is in use by active transactions?
- A. Transactions write their undo in a temporary tablespace.
- B. Transactions fail.
- C. Transactions write their undo in the SYSTEM undo segment.
- D. Transactions wait until space becomes available in UNDOTBS1.
Answer: B
Explanation:
Explanation
Explanation/Reference:
References: https://docs.oracle.com/cd/B19306_01/server.102/b14231/undo.htm (undo retention)
NEW QUESTION 68
Which statement is true about using the Database Upgrade Assistant (DBUA) to upgrade your database from Oracle Database 11g to Oracle Database 12c?
- A. It automatically makes necessary changes to Oracle environment variables.
- B. It automatically enables unified auditing in the upgraded database.
- C. It terminates if the SYSTEM tablespace in the source database is not autoextensible.
- D. It automatically adds new data files if there is not enough disk space to grow.
Answer: D
Explanation:
Explanation
Explanation/Reference:
References: https://docs.oracle.com/cd/E18283_01/server.112/e17222/upgrade.htm#insertedID5
NEW QUESTION 69
You have altered a non-unique index to be invisible to determine if queries execute within an acceptable response
ti me without using this index.
Which two are possible if table updates are performed which affect the invisible index columns?
- A. The index automatically becomes visible in order to have it updated by DML on the table.
- B. The index remains invisible.
- C. The index is updated by the DML on the table.
- D. The index becomes unusable but the table is updated by the DML.
- E. The index is not updated by the DML statements on the indexed table.
Answer: B,C
Explanation:
Unlike unusable indexes, an invisible index is maintained during DML statements.
Note:
* Oracle 11g allows indexes to be marked as invisible. Invisible indexes are maintained like any other index, but they
are ignored by the optimizer unless the OPTIMIZER_USE_INVISIBLE_INDEXES parameter is set to TRUE at the instance
or session level. Indexes can be created as invisible by using the INVISIBLE keyword, and their visibility can be toggled
using the ALTER INDEX command.
NEW QUESTION 70
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