1Z0-062 Oracle Exam Questions and Free Practice Test

Question 31

Which two statements are true about the logical storage structure of an Oracle database? (Choose two.)

A. An extent contains data blocks that are always physically contiguous on disk.

B. An extent can span multiple segments.

C. Each data block always corresponds to one operating system block.

D. It is possible to have tablespaces of different block sizes.

E. A data block is the smallest unit of I/O in data files.

Correct Answer:DE

Question 32

You executed the following command to create a password file in the database server:
$ orapwd file = orapworcl entries = 5 ignorecase=N
Which statement describes the purpose of the above password file?

A. It records usernames and passwords of users when granted the DBA role

B. It contains usernames and passwords of users for whom auditing is enabled

C. It is used by Oracle to authenticate users for remote database administrator

D. It records usernames and passwords of all users when they are added to OSDBA or OSOPER operating groups

Correct Answer:C

Question 33

Which three statements are true concerning unplugging a pluggable database (PDB)? (Choose three.)

A. The PDB must be open in read only mode.

B. The PDB must be dosed.

C. The unplugged PDB becomes a non-CDB.

D. The unplugged PDB can be plugged into the same multitenant container database (CDB)

E. The unplugged PDB can be plugged into another CDB.

F. The PDB data files are automatically removed from disk.

Correct Answer:BDE
B, not A: The PDB must be closed before unplugging it.
D: An unplugged PDB contains data dictionary tables, and some of the columns in these encode information in an endianness-sensitive way. There is no supported way to handle the conversion of such columns automatically. This means, quite simply, that an unplugged PDB cannot be moved across an endianness difference.
E (not F): To exploit the new unplug/plug paradigm for patching the Oracle version most effectively, the source and destination CDBs should share a filesystem so that the PDB’s datafiles can remain in place.
References:

Question 34

Identify three benefits of Unified Auditing.

A. Decreased use of storage to store audit trail rows in the database.

B. It improves overall auditing performance.

C. It guarantees zero-loss auditing.

D. The audit trail cannot be easily modified because it is read-only.

E. It automatically audits Recovery Manager (RMAN) events.

Correct Answer:ABE
A: Starting with 12c, Oracle has unified all of the auditing types into one single unit called Unified auditing. You don’t have to turn on or off all of the different auidting types individually and as a matter of fact auditing is enabled by default right out of the box. The AUD$ and FGA$ tables have been replaced with one single audit trail table. All of the audit data is now stored in Secure Files table thus improving the overall management aspects of audit data itself.
B: Further the audit data can also be buffered solving most of the common performance related problems seen on busy environments.
E: Unified Auditing is able to collect audit data for Fine Grained Audit, RMAN, Data Pump, Label Security, Database Vault and Real Application Security operations.
Note:
* Benefits of the Unified Audit Trail
The benefits of a unified audit trail are many:
/ (B) Overall auditing performance is greatly improved. The default mode that unified audit works is Queued Write mode. In this mode, the audit records are batched in SGA queue and is persisted in a periodic way. Because the audit records are written to SGA queue, there is a significant performance improvement.
/ The unified auditing functionality is always enabled and does not depend on the initialization parameters that were used in previous releases
/ (A) The audit records, including records from the SYS audit trail, for all the audited components of your Oracle Database installation are placed in one location and in one format, rather than your having to look in different places to find audit trails in varying formats. This consolidated view enables auditors to co-relate audit information from different components. For example, if an error occurred during an INSERT statement, standard auditing can indicate the error number and the SQL that was executed. Oracle Database Vault-specific information can indicate whether this error happened because of a command rule violation or realm violation. Note that there will be two audit records with a distinct AUDIT_TYPE. With this unification in place, SYS audit records appear with AUDIT_TYPE set to Standard Audit.
/ The management and security of the audit trail is also improved by having it in single audit trail.
/ You can create named audit policies that enable you to audit the supported components listed at the beginning of this section, as well as SYS administrative users. Furthermore, you can build conditions and exclusions into your policies.
* Oracle Database 12c Unified Auditing enables selective and effective auditing inside the Oracle database using policies and conditions. The new policy based syntax simplifies management of auditing within the database and provides the ability to accelerate auditing based on conditions.
* The new architecture unifies the existing audit trails into a single audit trail, enabling simplified management and increasing the security of audit data generated by the database.

Question 35

In your database instance, the UNDO_RETENTION parameter is set to 1000 and undo retention is not guaranteed for the fixed size undo tablespace.
Which statement is true about undo retention?

A. Undo is retained in the UNDO tablespace for 1000 seconds, and then moved to the SYSTEM tablespace to provide read consistency.

B. Inactive undo is retained for at least 1000 seconds if free undo space is available.

C. Inactive undo is retained for 1000 seconds even if new transactions fall due to lack of space in the undo tablespace.

D. Undo becomes expired obsolete after 1000 second

Correct Answer:B

Question 36

Oracle Grid Infrastructure for a stand-alone server is installed on your production host before installing the Oracle Database server. The database and listener are configured by using Oracle Restart.
Examine the following command and its output:
$ crsctl config has CRS-4622: Oracle High Availability Services auto start is enabled. What does this imply?

A. When you start an instance on a high with SQL *Plus dependent listeners and ASM disk groups are automatically started.

B. When a database instance is started by using the SRVCTL utility and listener startup fails, the instance is still started.

C. When a database is created by using SQL* Plus, it is automatically added to the Oracle Restart configuration.

D. When you create a database service by modifying the SERVICE_NAMES initialization parameter, it is automatically added to the Oracle Restart configuration.

Correct Answer:B
About Startup Dependencies
Oracle Restart ensures that Oracle components are started in the proper order, in accordance with component dependencies. For example, if database files are stored in Oracle ASM disk groups, then before starting the database instance, Oracle Restart ensures that the Oracle ASM instance is started and the required disk groups are mounted. Likewise, if a component must be shut down, Oracle Restart ensures that dependent components are cleanly shut down first.
Oracle Restart also manages the weak dependency between database instances and the Oracle Net listener (the listener): When a database instance is started, Oracle Restart attempts to start the listener. If the listener startup fails, then the database is still started. If the listener later fails, Oracle Restart does not shut down and restart any database instances. http://docs.oracle.com/cd/E16655_01/server.121/e17636/restart.htm#ADMIN12710

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