[2021-New] Oracle 1Z0-062 Dumps With Update Exam Questions (61-70)

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1Z0-062 Exam Questions - Online Test

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Q1. Your multitenant container (CDB) containing three pluggable databases (PDBs) is running in ARCHIVELOG mode. You find that the SYSAUX tablespace is corrupted in the root container.

The steps to recover the tablespace are as follows:

1. Mount the CDB.

2. Close all the PDBs.

3. Open the database.

4. Apply the archive redo logs.

5. Restore the data file.

6. Take the SYSAUX tablespace offline.

7. Place the SYSAUX tablespace online.

8. Open all the PDBs with RESETLOGS.

9. Open the database with RESETLOGS.

10. Execute the command SHUTDOWN ABORT.

Which option identifies the correct sequence to recover the SYSAUX tablespace?

A. 6, 5, 4, 7

B. 10, 1, 2, 5, 8

C. 10, 1, 2, 5, 4, 9, 8

D. 10, 1, 5, 8, 10

Answer: A

Explanation: RMAN> ALTER TABLESPACE sysaux OFFLINE IMMEDIATE; RMAN> RESTORE TABLESPACE sysaux; RMAN> RECOVER TABLESPACE sysaux; RMAN> ALTER TABLESPACE sysaux ONLINE;

* Example:

While evaluating the 12c beta3 I was not able to do the recover while testing “all pdb files lost”.

Cannot close the pdb as the system datafile was missing…

So only option to recover was:

Shutdown cdb (10)

startup mount; (1)

restore pluggable database

recover pluggable database

alter database open;

alter pluggable database name open;

Oracle support says: You should be able to close the pdb and restore/recover the system tablespace of PDB.

* Inconsistent backups are usually created by taking online database backups. You can also make an inconsistent backup by backing up data files while a database is closed, either:

/ Immediately after the crash of an Oracle instance (or, in an Oracle RAC configuration, all instances) / After shutting down the database using SHUTDOWN ABORT

Inconsistent backups are only useful if the database is in ARCHIVELOG mode and all archived redo logs created since the backup are available.

* Open the database with the RESETLOGS option after finishing recovery: SQL> ALTER DATABASE OPEN RESETLOGS;

Q2. You want to flash back a test database by five hours.

You issue this command:

SQL > FLASHBACK DATABASE TO TIMESTAMP (SYSDATE - 5/24);

Which two statements are true about this flashback scenario?

A. The database must have multiplexed redo logs for the flashback to succeed.

B. The database must be MOUNTED for the flashback to succeed.

C. The database must use block change tracking for the flashback to succeed.

D. The database must be opened in restricted mode for the flashback to succeed.

E. The database must be opened with the RESETLOGS option after the flashback is complete.

F. The database must be opened in read-only mode to check if the database has been flashed back to the correct SCN.

Answer: B,E

Q3. Which three operations can be performed as multipartition operations in Oracle?

A. Merge partitions of a list partitioned table

B. Drop partitions of a list partitioned table

C. Coalesce partitions of a hash-partitioned global index.

D. Move partitions of a range-partitioned table

E. Rename partitions of a range partitioned table

F. Merge partitions of a reference partitioned index

Answer: A,B,F

Explanation: Multipartition maintenance enables adding, dropping, truncate, merge, split operations on multiple partitions.

A: Merge Multiple Partitions:

The new “ALTER TABLE … MERGE PARTITIONS ” help merge multiple partitions or subpartitions with a single statement. When merging multiple partitions, local and global index operations and semantics for inheritance of unspecified physical attributes are the same for merging two partitions.

B: Drop Multiple Partitions:

The new “ALTER TABLE … DROP PARTITIONS ” help drop multiple partitions or subpartitions with a single statement.

Example:

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SQL> ALTER TABLE Tab_tst1 DROP PARTITIONS

Tab_tst1_PART5, Tab_tst1_PART6, Tab_tst1_PART7;

Table altered

SQL>

Restrictions :

-You can’t drop all partitions of the table.

-If the table has a single partition, you will get the error: ORA-14083: cannot drop the only partition of a partitioned.

Q4. In your Database, the TBS PERCENT USED parameter is set to 60 and the TBS PERCENT FREE parameter is set to 20.

Which two storage-tiering actions might be automated when using information Lifecycle Management (ILM) to automate data movement?

A. The movement of all segments to a target tablespace with a higher degree of compression, on a different storage tier, when the source tablespace exceeds TBS PERCENT USED

B. Setting the target tablespace to read-only

C. The movement of some segments to a target tablespace with a higher degree of compression, on a different storage tier, when the source tablespace exceeds TBS PERCENT USED

D. Setting the target tablespace offline E. The movement of some blocks to a target tablespace with a lower degree of compression, on a different storage tier, when the source tablespace exceeds TBS PERCENT USED

Answer: B,C

Explanation:

The value for TBS_PERCENT_USED specifies the percentage of the tablespace quota when a tablespace is considered full. The value for TBS_PERCENT_FREE specifies the targeted free percentage for the tablespace. When the percentage of the tablespace quota reaches the value of TBS_PERCENT_USED, ADO begins to move data so that percent free of the tablespace quota approaches the value of TBS_PERCENT_FREE. This action by ADO is a best effort and not a guarantee.

Q5. Which two statements are true about the Automatic Database Diagnostic Monitor (ADDM)? (Choose two.)

A. The ADDM requires at least four AWR snapshots for analysis

B. The ADDM runs after each AWR snapshot is collected automatically by MMON

C. The results of the ADDM analysis are stored in the Automatic Workload Repository (AWR)

D. The ADDM analysis provides only diagnostics information but does not provide recommendations

E. The ADDM calls other advisors if required, but does not provide recommendations about the advisors

Answer: B,C

Q6. 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 SYS

B. All users except SCOTT

C. All users except sys and SCOTT

D. All users except sys, system, and SCOTT

Answer: B

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;

Reference: Oracle Database Security Guide 12c, About Enabling Unified Audit Policies

Q7. Which two statements are true about the Oracle Direct Network File system (DNFS)?

A. It utilizes the OS file system cache.

B. A traditional NFS mount is not required when using Direct NFS.

C. Oracle Disk Manager can manage NFS on its own, without using the operating kernel NFS driver.

D. Direct NFS is available only in UNIX platforms.

E. Direct NFS can load-balance I/O traffic across multiple network adapters.

Answer: C,E

Explanation: E: Performance is improved by load balancing across multiple network interfaces (if available).

Note:

* To enable Direct NFS Client, you must replace the standard Oracle Disk Manager (ODM) library with one that supports Direct NFS Client.

Incorrect: Not A: Direct NFS Client is capable of performing concurrent direct I/O, which bypasses any operating system level caches and eliminates any operating system write-ordering locks Not B:

* To use Direct NFS Client, the NFS file systems must first be mounted and available over regular NFS mounts.

* Oracle Direct NFS (dNFS) is an optimized NFS (Network File System) client that provides faster and more scalable access to NFS storage located on NAS storage devices (accessible over TCP/IP). Not D: Direct NFS is provided as part of the database kernel, and is thus available on all supported database platforms - even those that don't support NFS natively, like Windows.

Note:

* Oracle Direct NFS (dNFS) is an optimized NFS (Network File System) client that provides faster and more scalable access to NFS storage located on NAS storage devices (accessible over TCP/IP). Direct NFS is built directly into the database kernel - just like ASM which is mainly used when using DAS or SAN storage.

* Oracle Direct NFS (dNFS) is an internal I/O layer that provides faster access to large NFS files than traditional NFS clients.

Q8. You plan to implement the distributed database system in your company. You invoke Database Configuration Assistant (DBCA) to create a database on the server. During the installation, DBCA prompts you to specify the Global Database Name.

What must this name be made up of?

A. It must be made up of a database name and a domain name.

B. It must be made up of the value in ORACLE_SID and HOSTNAME.

C. It must be made up of the value that you plan to assign for INSTANCE_NAME and HOSTNAME.

D. It must be made up of the value that you plan to assign for ORACLE_SID and SERVICE_NAMES.

Answer: A

Explanation: Using the DBCA to Create a Database (continued)

3. Database Identification: Enter the Global Database Name in The form database_name.domain_name, and the system identifier (SID). The SID defaults lo the database name and uniquely identifies the instance associated with the database.

4. Management Options: Use this page to set up your database so that it can be managed with Oracle Enterprise Manager. Select the default: "Configure the Database with Enterprise Manager." Optionally, this page allows you to configure alert notifications and daily disk backup area settings.

Note: Yon must configure the listener before you can configure Enterprise Manager (as shown earlier).

Q9. Which three statements are true about a job chain?

A. It can contain a nested chain of jobs.

B. It can be used to implement dependency-based scheduling.

C. It cannot invoke the same program or nested chain in multiple steps in the chain.

D. It cannot have more than one dependency.

E. It can be executed using event-based or time-based schedules.

Answer: A,B,E

Reference: http://docs.oracle.com/cd/B28359_01/server.111/b28310/scheduse009.htm#ADMIN12459

Q10. Your multitenant container database (CDB) contains pluggable databases (PDBs), you are connected to the HR_PDB. You execute the following command:

SQL > CREATE UNDO TABLESPACE undotb01

DATAFILE ‘u01/oracle/rddb1/undotbs01.dbf’ SIZE 60M AUTOEXTEND ON;

What is the result?

A. It executes successfully and creates an UNDO tablespace in HR_PDB.

B. It falls and reports an error because there can be only one undo tablespace in a CDB.

C. It fails and reports an error because the CONTAINER=ALL clause is not specified in the command.

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

E. It executes successfully but neither tablespace nor the data file is created.

Answer: E

Explanation: Interesting behavior in 12.1.0.1 DB of creating an undo tablespace in a PDB. With the new Multitenant architecture the undo tablespace resides at the CDB level and PDBs all share the same UNDO tablespace.

When the current container is a PDB, an attempt to create an undo tablespace fails without returning an error.