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Code d'Examen: 1z0-100
Nom d'Examen: Oracle (Oracle Linux 5 and 6 System Administration)
Questions et réponses: 108 Q&As
Code d'Examen: 1z0-062
Nom d'Examen: Oracle (Oracle Database 12c: Installation and Administration)
Questions et réponses: 166 Q&As
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NO.1 Which three factors influence the optimizer's choice of an execution plan?
A. the optimizer_mode initialization parameter
B. operating system (OS) statistics
C. cardinality estimates
D. object statistics in the data dictionary
E. fixed baselines
Answer: A,B
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Reference: http://docs.oracle.com/cd/B19306_01 /server.102 /b14211 /optimops.htm
NO.2 The hr user receiver, the following error while inserting data into the sales table: ERROR at line
1:
ORA-01653; unable to extend table HR.SALES by 128 in tablespace USERS
On investigation, you find that the users tablespace uses Automnrif 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?
A. Altering the data life associated with the USERS tablespace to ex automatically
B. Adding a data life to the USERS tablespace
C. Changing segment space management for the USERS tablespace to manual
D. Creating a new tablespace with autoextend enabled and changing the default tablespace of the
HR user to the new tablespace
E. Enabling resumable space allocation by setting the RESUMABLE_TIMEOUT parameter to a
nonzero value
Answer: A,D
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NO.3 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
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Reference:
http://docs.oracle.com/cd/B28359_01 /server.111 /b28310/scheduse009.htm#ADMIN12459
12. Which two tasks can be performed on an external table?
A. partitioning the table
B. creating an invisible index
C. updating the table by using an update statement
D. creating a public synonym
E. creating a view
Answer: C,D
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13. A user establishes a connection to a database instance by using an Oracle Net connection.
You want to ensure the following:
1.The user account must be locked after five unsuccessful login attempts.
2.Data read per session must be limited for the user. 3- The user cannot have more than three
simultaneous sessions.
4. The user must have a maximum of 10 minutes session idle time before being logged off
automatically.
How would you accomplish this?
A. by granting a secure application role to the user
B. by implementing Database Resource Manager
C. by using Oracle Label Security options
D. by assigning a profile to the user
Answer: D
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14. Which action takes place when a file checkpoint occurs?
A. The checkpoint position is advanced in the checkpoint queue.
B. All buffers for a checkpointed file that were modified before a specific SCN are written to disk by
DBWn and the SCN is stored in the control file.
C. The Database Writer process (DBWn) writes all dirty buffers in the buffer cache to data files.
D. The Log Writer process (LGWR) writes all redo entries in the log buffer to online redo log files.
Answer: C
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15. As a user of the ORCL database, you establish a database link to the remote HQ database
such that all users in the ORCL database may access tables only from the SCOTT schema in the HQ
database. SCOTT's password is TIGER. The service mane "HQ" is used to connect to the remote HQ
database.
Which command would you execute to create the database link?
A. CREATE DATABASE LINK HQ USING 'HQ';
B. CREATE DATABASE LINK HQ CONNECT TO CXJRRENT_USER USING HQ' S
C. CREATE PUBLIC DATABASE LINK HQ CONNECT TO scott IDENTIFIED BY tiger USING 'HQ';
D. CREATE DATABASE LINK HQ CONNECT TO scott IDENTIFIED BY tiger USING 'HQ';
Answer: B
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NO.4 Which two statements are true about the logical storage structure of an Oracle database?
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.
Answer: B,D
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Reference: http://docs.oracle.com/cd/E11882_01 /server.112 /e40540/logical.htm#CNCPT250
NO.5 Which statement is true about the Log Writer process?
A. It writes when it receives a signal from the checkpoint process (CKPT).
B. It writes concurrently to all members of multiplexed redo log groups.
C. It writes after the Database Writer process writes dirty buffers to disk.
D. It writes when a user commits a transaction.
Answer: D
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Reference: http://docs.oracle.com/cd/B19306_01 /server.102 /b14220/process.htm (see log writer
process (LGWR))
NO.6 Examine the parameters for your database instance:
NAMETYPE VALUE
undo_management string AUTO undo_retentioninteger 12 00 undo_tablespace string UNDOTBS1
You execute the following command:
SQL> ALTER TABLESPACE undotbs1 RETENTION NOGUARANTEE;
Which statement is true in this scenario?
A. Undo data is written to flashback logs after 1200 seconds.
B. Inactive undo data is retained for 1200 seconds even if subsequent transactions fail due to lack of
space in the undo tablespace.
C. You can perform a Flashback Database operation only within the duration of 1200 seconds.
D. An attempt is made to keep inactive undo for 1200 seconds but transactions may overwrite the
undo before that time has elapsed.
Answer: A
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NO.7 Which two statements correctly describe the relationship between data files and logical
database structures?
A. A segment cannot span data files.
B. A data file can belong to only one tablespace.
C. An extent cannot span data files.
D. The size of an Oracle data block in a data file should be the same as the size of an OS block.
Answer: B,C
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Reference: https://mohibalvi.wordpress.com/tag/alter-tablespace/
NO.8 You plan to create a database by using the Database Configuration Assistant (DBCA), with the
following specifications:
-Applications will connect to the database via a middle tier.
-The number of concurrent user connections will be high.
-The database will have mixed workload, with the execution of complex BI queries scheduled at
night.
Which DBCA option must you choose to create the database?
A. a General Purpose database template with default memory allocation
B. a Data Warehouse database template, with the dedicated server mode option and AMM enabled
C. a General Purpose database template, with the shared server mode option and Automatic
Memory Management (AMM) enabled
D. a default database configuration
Answer: C
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Reference:
http://www.oracledistilled.com/oracle-database/administration/creating-a-databaseusing-database
-configuration-assistant/
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