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Particularly, 1Z0-062 certification test contains a total of about 67 multiple-choice questions that the students have to complete within 2 hours. If you want to pass this exam, you should try to get more than 64% of the correct answers. This Oracle test will cost you $245 and to ace it with flying colors, you should explore its topics first. Thus, here are a few of them:
- Oracle network environment configuration;
- User security administration;
- Concepts of recovery and backup;
- Database storage structures and undo data management;
- Introduction to DBAAS.
- Developing and managing tablespaces;
- Oracle database architecture and management tools;
- Oracle database software upgrade;
The procedure of earning this associate-level Oracle Database certificate expands by all odds the boundaries of candidates' knowledge and applied experience, allowing them to accomplish complicated practical lab tasks on the final test, and then in practice on a daily basis. Meanwhile, Oracle certification tests reveal your potential and measure as well as challenge your capability to reason and act through real questions based on varied scenarios.
NEW QUESTION 179
You must track all transactions that modify certain tables in the sales schema for at least three years.
Automatic undo management is enabled for the database with a retention of one day.
Which two must you do to track the transactions? (Choose two.)
- A. Create a Flashback Data Archive in the tablespace where the tables are stored.
- B. Create a Flashback Data Archive in any suitable tablespace.
- C. Specify undo retention guarantee for the database.
- D. Enable Flashback Data Archiving for the tables that require tracking.
- E. Enable supplemental logging for the database.
Answer: B,D
Explanation:
E: By default, flashback archiving is disabled for any table. You can enable flashback archiving for a table if you have the FLASHBACK ARCHIVE object privilege on the Flashback Data Archive that you want to use for that table.
D: Creating a Flashback Data Archive
/ Create a Flashback Data Archive with the CREATE FLASHBACK ARCHIVE statement, specifying the following:
Name of the Flashback Data Archive
Name of the first tablespace of the Flashback Data Archive
(Optional) Maximum amount of space that the Flashback Data Archive can use in the first tablespace
/ Create a Flashback Data Archive named fla2 that uses tablespace tbs2, whose data will be retained for two years:
CREATE FLASHBACK ARCHIVE fla2 TABLESPACE tbs2 RETENTION 2 YEAR;
NEW QUESTION 180
What is the effect of specifying the "ENABLE PLUGGABLE DATABASE" clause in a "CREATE DATABASE" statement?
- A. It will create a multitenant container database (CDB) with only the root opened.
- B. It will create a CDB with root and seed opened and one PDB mounted.
- C. It will create a CDB that must be plugged into an existing CDB.
- D. It will create a CDB with root opened and seed mounted.
- E. It will create a CDB with root opened and seed read only.
Answer: E
Explanation:
* The CREATE DATABASE ... ENABLE PLUGGABLE DATABASE SQL statement creates a new CDB. If you do not specify the ENABLE PLUGGABLE DATABASE clause, then the newly created database is a non-CDB and can never contain PDBs.
Along with the root (CDB$ROOT), Oracle Database automatically creates a seed PDB (PDB$SEED). The following graphic shows a newly created CDB:
* Creating a PDB
Rather than constructing the data dictionary tables that define an empty PDB from scratch, and then populating its Obj$ and Dependency$ tables, the empty PDB is created when the CDB is created. (Here, we use empty to mean containing no customer-created artifacts.) It is referred to as the seed PDB and has the name PDB$Seed. Every CDB non-negotiably contains a seed PDB; it is non-negotiably always open in read-only mode. This has no conceptual significance; rather, it is just an optimization device. The create PDB operation is implemented as a special case of the clone PDB operation.
NEW QUESTION 181
You execute this command:
Which two statements are true about segment space management for segments in this tablespace?
(Choose two.)
- A. The PCTUSEDstorage parameter has no effect on segments created in this tablespace.
- B. Space utilization inside segments is mapped by bitmaps.
- C. Segments are automatically shrunk and compressed when rows are deleted.
- D. The PCTFREEstorage parameter has no effect on segments created in this tablespace.
Answer: A,B
NEW QUESTION 182
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 you create a database service by modifying the SERVICE_NAMES initialization parameter, it is automatically added to the Oracle Restart configuration.
- D. When a database is created by using SQL* Plus, it is automatically added to the Oracle Restart configuration.
Answer: B
Explanation:
Explanation/Reference:
Explanation:
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
NEW QUESTION 183
You notice a performance change in your production Oracle database and you want to know which change has made this performance difference.
You generate the Compare Period Automatic Database Diagnostic Monitor (ADDM) report to further investigation.
Which three findings would you get from the report? (Choose three.)
- A. It gives information about statistics collection in both time periods.
- B. It detects any configuration change that caused a performance difference in both time periods.
- C. It shows the difference in the size of memory pools in both time periods.
- D. It identifies any workload change that caused a performance difference in both time periods.
- E. It shows the resource usage for CPU, memory, and I/O in both time periods.
- F. It detects the top wait events causing performance degradation.
Answer: B,D,E
Explanation:
Keyword: shows the difference.
* Full ADDM analysis across two AWR snapshot periods
Detects causes, measure effects, then correlates them
Causes: workload changes, configuration changes
Effects: regressed SQL, reach resource limits (CPU, I/O, memory, interconnect) Makes actionable recommendations along with quantified impact
* Identify what changed
/ Configuration changes, workload changes
* Performance degradation of the database occurs when your database was performing optimally in the past, such as 6 months ago, but has gradually degraded to a point where it becomes noticeable to the users. The Automatic Workload Repository (AWR) Compare Periods report enables you to compare database performance between two periods of time.
While an AWR report shows AWR data between two snapshots (or two points in time), the AWR Compare Periods report shows the difference (ABE) between two periods (or two AWR reports with a total of four snapshots). Using the AWR Compare Periods report helps you to identify detailed performance attributes and configuration settings that differ between two time periods.
References:
NEW QUESTION 184
You upgraded your database from pre-12c to a multitenant container database (CDB) containing pluggable databases (PDBs).
Examine the query and its output:
Which two tasks must you perform to add users with SYSBACKUP, SYSDG, and SYSKM privilege to the password file? (Choose two.)
- A. Re-create the password file with SYSBACKUP, SYSDG, and SYSKM privilege and the FORCE argument set to No.
- B. Assign the appropriate operating system groups to SYSBACKUP, SYSDG, SYSKM.
- C. Re-create the password file with SYSBACKUP, SYSDG, and SYSKM privilege, and FORCE arguments set to Yes.
- D. Re-create the password file in the Oracle Database 12c format.
- E. Grant SYSBACKUP, SYSDG, and SYSKM privileges to the intended users.
Answer: C,E
Explanation:
Explanation
* orapwd
/ You can create a database password file using the password file creation utility, ORAPWD.
The syntax of the ORAPWD command is as follows:
orapwd FILE=filename [ENTRIES=numusers] [FORCE={y|n}] [ASM={y|n}]
[DBUNIQUENAME=dbname] [FORMAT={12|legacy}] [SYSBACKUP={y|n}] [SYSDG={y|n}]
[SYSKM={y|n}] [DELETE={y|n}] [INPUT_FILE=input-fname]
force - whether to overwrite existing file (optional),
* v$PWFILE_users
/ 12c: V$PWFILE_USERS lists all users in the password file, and indicates whether the user has been granted the SYSDBA, SYSOPER, SYSASM, SYSBACKUP, SYSDG, and SYSKM privileges.
/ 10c: sts users who have been granted SYSDBA and SYSOPER privileges as derived from the password file.
ColumnDatatypeDescription
USERNAMEVARCHAR2(30)The name of the user that is contained in the password file SYSDBAVARCHAR2(5)If TRUE, the user can connect with SYSDBA privileges SYSOPERVARCHAR2(5)If TRUE, the user can connect with SYSOPER privileges Incorrect:
not E: The format of the v$PWFILE_users file is already in 12c format.
NEW QUESTION 185
Which two statements are true about extents?
- A. The blocks of a newly allocated extent, although free, may have been used before.
- B. Blocks belonging to an extent can be spread across multiple data files.
- C. Data blocks in an extent are automatically reclaimed for use by other objects in a tablespace when all the rows in a table are deleted.
- D. Data blocks in an extent are logically contiguous but can be non-contiguous on disk.
Answer: A,D
Explanation:
Explanation/Reference:
Explanation:
NEW QUESTION 186
The HR user receives the following error while inserting data into the sales table:
On investigation, you find that the users tablespace uses Automatic Segment Space Management (ASSM). It is the default tablespace for the HR user with an unlimited quota on it.
Which two methods would you use to resolve this error? (Choose two.)
- A. Creating a new tablespace with autoextend enabled and changing the default tablespace of the HR user to the new tablespace
- B. Changing segment space management for the USERS tablespace to manual
- C. Adding a data file to the USERS tablespace
- D. Enabling resumable space allocation by setting the RESUMABLE_TIMEOUT parameter to a nonzero value
- E. Altering the data file associated with the USERS tablespace to extend automatically
Answer: C,E
NEW QUESTION 187
Examine the parameters for your database instance:
Which three statements are true about the process of automatic optimization by using cardinality feedback?
(Choose three.)
- 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 enables monitoring for cardinality feedback after the first execution of a query.
- C. The optimizer does not monitor cardinality feedback if dynamic sampling and multicolumn statistics are enabled.
- D. The optimizer can re optimize a query only once using cardinality feedback.
- E. After the optimizer identifies a query as a re-optimization candidate, statistics collected by the collectors are submitted to the optimizer.
Answer: A,B,C
Explanation:
Explanation
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.
NEW QUESTION 188
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 terminates if the SYSTEM tablespace in the source database is not autoextensible.
- B. It automatically makes necessary changes to Oracle environment variables.
- C. It automatically adds new data files if there is not enough disk space to grow.
- D. It automatically enables unified auditing in the upgraded database.
Answer: C
Explanation:
References:
https://docs.oracle.com/cd/E18283_01/server.112/e17222/upgrade.htm#insertedID5
NEW QUESTION 189
Examine the query and its output executed In an RDBMS Instance:
Which three statements are true about the users (other than sys) in the output?
- A. The C # # B_ADMIN user can perform all backup and recovery operations using RMAN only.
- B. The C # # A_ADMIN user can perform wallet operations.
- C. The C # # C_ADMIN user can perform the data guard operation with Data Guard Broker.
- D. The C # # B_ADMIN user can perform all backup and recovery operations using RMAN or SQL* Plus.
- E. The C # # D_ADMIN user can perform backup and recovery operations for Automatic Storage Management (ASM).
Answer: C,D,E
Explanation:
B: SYSDG administrative privilege has ability to perform Data Guard operations (including startup and shutdown) using Data Guard Broker or dgmgrl.
D: SYSASM The new (introduced in 11g) SYSASM role to manage the ASM instance, variable extent sizes to reduce shared pool usage, and the ability of an instance to read from a specific disk of a diskgroup
E (Not A): SYSDBA is like a role in the sense that it is granted, but SYSDBA is a special built-in
privilege to allow the DBA full control over the database
Incorrect:
Not C: SYSKM. SYSKM administrative privilege has ability to perform transparent data encryption
wallet operations.
Note:
Use the V$PWFILE_USERS view to see the users who have been granted administrative
privileges.
NEW QUESTION 190
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. Setting the target tablespace to read-only
- B. Setting the target tablespace offline
- 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. 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 - 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: A,C
Explanation:
The value forTBS_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 valueof 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.
NEW QUESTION 191
Examine this command:
Now examine these steps:
1. Oracle instance is started.
2. The control file is read.
3. Instance recovery is started.
4. Datafiles and redo log files are opened.
5. The spfile or pfile is read.
6. The database is available for use.
7. The database is mounted.
8. Instance recovery is completed.
Identify the steps that were executed in the correct order to open the database:
- A. 5, 1, 3, 2, 7, 4, 6, 8
- B. 5, 1, 2, 7, 4, 6
- C. 5, 2, 1, 4, 7, 6
- D. 5, 2, 1, 7, 4, 3, 6, 8
- E. 5, 1, 2, 7, 4, 3, 6, 8
- F. 5, 1, 2, 7, 4, 3, 8, 6
Answer: B
NEW QUESTION 192
Which statement is true regarding the startup of a database instance?
- A. Instance recovery is not required if the database instance was shut down by using SHUTDOWN IMMEDIATE.
- B. Media recovery is required when the database is shut down by using either the IMMEDIATE option or the ABORT option.
- C. Uncommitted transactions are rolled back during the startup of the database instance after a shutdown using the immediate option.
- D. The instance does not start up normally and requires manual media recovery after a shutdown using the ABORT option.
- E. There is no difference in the underlying mechanics of the startup whether the database is shut down by using the IMMEDIATE option or the ABORT option.
Answer: A
Explanation:
Explanation
References:
http://docs.oracle.com/cd/A87860_01/doc/server.817/a76956/start.htm
NEW QUESTION 193
You configure your database Instance to support shared server connections.
Which two memory areas that are part of PGA are stored in SGA instead, for shared server connection? (Choose two.)
- A. Stack space
- B. Location of a part of the runtime area for SELECT statements
- C. Location of the runtime area for DML and DDL Statements
- D. User session data
- E. Private SQL area
Answer: D,E
Explanation:
A: PGA itself is subdivided. The UGA (User Global Area) contains session state information, including stuff like package-level variables, cursor state, etc. Note that, with shared server, the UGA is in the SGA. It has to be, because shared server means that the session state needs to be accessible to all server processes, as any one of them could be assigned a particular session. However, with dedicated server (which likely what you're using), the UGA is allocated in the PGA.
C: The Location of a private SQL area depends on the type of connection established for a session. If a session is connected through a dedicated server, private SQL areas are located in the server process' PGA. However, if a session is connected through a shared server, part of the private SQL area is kept in the SGA.
Note:
* System global area (SGA)
The SGA is a group of shared memory structures, known as SGA components, that contain data and control information for one Oracle Database instance. The SGA is shared by all server and background processes. Examples of data stored in the SGA include cached data blocks and shared SQL areas.
* Program global area (PGA)
A PGA is a memory region that contains data and control information for a server process.
It is nonshared memory created by Oracle Database when a server process is started.
Access to the PGA is exclusive to the server process. There is one PGA for each server process. Background processes also allocate their own PGAs. The total memory used by all individual PGAs is known as the total instance PGA memory, and the collection of individual PGAs is referred to as the total instance PGA, or just instance PGA. You use database initialization parameters to set the size of the instance PGA, not individual PGAs.
References:
NEW QUESTION 194
......
The Oracle 1Z0-062 is one of the two certification exams that you need to pass in order to get the Oracle Database 12c Administrator Certified Associate certificate. The second test is 1Z0-071. The target audience for this exam is those individuals who want to prove their skills in fundamental database terminologies and concepts to guide vital functions for businesses, processes, and systems.
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