Oracle Oracle Certifications 1Z0-060 Questions & Answers

• Question 111:

  You are connected using SQL* Plus to a multitenant container database (CDB) with SYSDBA privileges and execute the following sequence statements:

  

  What is the result of the last SET CONTAINER statement and why is it so?

  A. It succeeds because the PDB_ADMIN user has the required privileges.

  B. It fails because common users are unable to use the SET CONTAINER statement.

  C. It fails because local users are unable to use the SET CONTAINER statement.

  D. If fails because the SET CONTAINER statement cannot be used with PDB$SEED as the target pluggable database (PDB).

  Correct Answer: C

• Question 112:

  Examine the details of the Top 5 Timed Events in the following Automatic Workloads Repository (AWR) report:

  

  What are three possible causes for the latch-related wait events?

  A. The size of the shared pool is too small.

  B. Cursors are not being shared.

  C. A large number COMMITS are being performed.

  D. There are frequent logons and logoffs.

  E. The buffers are being read into the buffer cache, but some other session is changing the buffers.

  Correct Answer: ABE

• Question 113:

  You enabled an audit policy by issuing the following statements:

  SQL> AUDIT POLICY ORA_DATABASE_PARAMETER BY SCOTT;

  SQL> AUDIT POLICY ORA_DATABASE_PARAMETER BY SYS, SYSTEM;

  For which database users and for which executions is the audit policy now active? Select two.

  A. SYS, SYSTEM

  B. SCOTT

  C. Only for successful executions

  D. Only for failed executions

  E. Both successful and failed executions

  Correct Answer: AE

  * The ORA_DATABASE_PARAMETER policy audits commonly used Oracle Database parameter settings. By default, this policy is not enabled.

• Question 114:

  A redaction policy was added to the SAL column of the SCOTT.EMP table:

  

  All users have their default set of system privileges.

  For which three situations will data not be redacted? (Choose three.)

  A. SYS sessions, regardless of the roles that are set in the session

  B. SYSTEM sessions, regardless of the roles that are set in the session

  C. SCOTT sessions, only if the MGR role is set in the session

  D. SCOTT sessions, only if the MGR role is granted to SCOTT

  E. SCOTT sessions, because he is the owner of the table

  F. SYSTEM session, only if the MGR role is set in the session

  Correct Answer: ABD

  Both users SYS and SYSTEM automatically have the EXEMPT REDACTION POLICY system privilege. (SYSTEM has the EXP_FULL_DATABASE role, which includes the EXEMPT REDACTION POLICY system privilege.) This means that the SYS and SYSTEM users can always bypass any existing Oracle Data Redaction policies, and will always be able to view data from tables (or views) that have Data Redaction policies defined on them

• Question 115:

  Which three statements are true when the listener handles connection requests to an Oracle 12c database instance with multithreaded architecture enabled In UNIX? (Choose three.)

  A. Thread creation must be routed through a dispatcher process

  B. The local listener may spawn a now process and have that new process create a thread

  C. Each Oracle process runs an SCMN thread.

  D. Each multithreaded Oracle process has an SCMN thread.

  E. The local listener may pass the request to an existing process which in turn will create a thread.

  Correct Answer: ABE

• Question 116:

  Which three operations can be performed as multipartition operations in Oracle Database 12c? (Choose three.)

  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.

  Correct Answer: ABF

  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:

  view plaincopy to clipboardprint?

  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.

• Question 117:

  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.

  Correct Answer: CE

  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 Answers:

  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

  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).

  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.

• Question 118:

  Examine the parameters for your database instance:

  

  Which three statements are true about the process of automatic optimization by using cardinality feedback?

  A. The optimizer automatically changes a plan during subsequent execution of a SQL statement if there is a huge difference in optimizer estimates and execution statistics.

  B. The optimizer can re optimize a query only once using cardinality feedback.

  C. The optimizer enables monitoring for cardinality feedback after the first execution of a query.

  D. The optimizer does not monitor cardinality feedback if dynamic sampling and multicolumn statistics are enabled.

  E. After the optimizer identifies a query as a re-optimization candidate, statistics collected by the collectors are submitted to the optimizer.

  Correct Answer: ACD

  C: During the first execution of a SQL statement, an execution plan is generated as usual.

  D: if multi-column statistics are not present for the relevant combination of columns, the optimizer can fall back on cardinality feedback.

  (not B)* Cardinality feedback. This feature, enabled by default in 11.2, is intended to improve plans for repeated executions.

  optimizer_dynamic_sampling optimizer_features_enable

  *

  dynamic sampling or multi-column statistics allow the optimizer to more accurately estimate selectivity of conjunctive predicates.

  Note:

  *

  OPTIMIZER_DYNAMIC_SAMPLING controls the level of dynamic sampling performed by the optimizer.

  Range of values. 0 to 10

  *

  Cardinality feedback was introduced in Oracle Database 11gR2. The purpose of this feature is to automatically improve plans for queries that are executed repeatedly, for which the optimizer does not estimate cardinalities in the plan properly. The optimizer may misestimate cardinalities for a variety of reasons, such as missing or inaccurate statistics, or complex predicates. Whatever the reason for the misestimate, cardinality feedback may be able to help.

• Question 119:

  You install a non-RAC Oracle Database. During Installation, the Oracle Universal Installer (OUI) prompts you to enter the path of the Inventory directory and also to specify an operating system group name.

  Which statement is true?

  A. The ORACLE_BASE base parameter is not set.

  B. The installation is being performed by the root user.

  C. The operating system group that is specified should have the root user as its member.

  D. The operating system group that is specified must have permission to write to the inventory directory.

  Correct Answer: D

  Note:

  Providing a UNIX Group Name

  If you are installing a product on a UNIX system, the Installer will also prompt you to provide the name of

  the group which should own the base directory.

  You must choose a UNIX group name which will have permissions to update, install, and deinstall Oracle

  software. Members of this group must have write permissions to the base directory chosen.

  Only users who belong to this group are able to install or deinstall software on this machine.

• Question 120:

  You are required to migrate your 11.2.0.3 database as a pluggable database (PDB) to a multitenant container database (CDB).

  The following are the possible steps to accomplish this task:

  1.

  Place all the user-defined tablespace in read-only mode on the source database.

  2.

  Upgrade the source database to a 12c version.

  3.

  Create a new PDB in the target container database.

  4.

  Perform a full transportable export on the source database with the VERSION parameter set to 12 using the expdp utility.

  5.

  Copy the associated data files and export the dump file to the desired location in the target database.

  6.

  Invoke the Data Pump import utility on the new PDB database as a user with the DATAPUMP_IMP_FULL_DATABASE role and specify the full transportable import options.

  7.

  Synchronize the PDB on the target container database by using the DBMS_PDS.SYNC_ODB function.

  Identify the correct order of the required steps.

  A. 2, 1, 3, 4, 5, 6

  B. 1, 3, 4, 5, 6, 7

  C. 1, 4, 3, 5, 6, 7

  D. 2, 1, 3, 4, 5, 6, 7

  E. 1, 5, 6, 4, 3, 2

  Correct Answer: C

  1.

  Set user tablespaces in the source database to READ ONLY.

  2.

  From the Oracle Database 11g Release 2 {11.2.0.3) environment, export the metadata and any data residing in administrative tablespaces from the source database using the FULL=Y and TRANSPORTABLE=ALWAYS parameters. Note that the VER$ION=12 parameter is required only when exporting from an Oracle Database llg Release 2 database:

  3.

  Copy the tablespace data files from the source system to the destination system. Note that the log file from the export operation will list the data files required to be moved.

  4.

  Create a COB on the destination system, including a PDB into which you will import the source database.

  5.

  In the Oracle Database 12c environment, connect to the pre-created PDB and import the dump file. The act of importing the dump file will plug the tablespace data files into the destination PDB Oracle White Paper - Upgrading to Oracle Database 12c -August 2013