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Code d'Examen: 1z0-062
Nom d'Examen: Oracle (Oracle Database 12c: Installation and Administration)
Questions et réponses: 166 Q&As
Code d'Examen: 1z0-485
Nom d'Examen: Oracle (Exadata Database Machine Models X3-2 and X3-8 Implementation Essentials)
Questions et réponses: 71 Q&As
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NO.1 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.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 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.4 What happens if a maintenance window closes before a job that collects optimizer statistics
completes?
A. The job is terminated and the gathered statistics are not saved.
B. The job is terminated but the gathered statistics are not published.
C. The job continues to run until all statistics are gathered.
D. The job is terminated and statistics for the remaining objects are collected the next time the
maintenance window opens.
Answer: D
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NO.5 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.6 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.7 Examine the resources consumed by a database instance whose current Resource Manager
plan is displayed.
SQL> SELECT name, active_sessions, queue_length, Consumed_cpu_time, cpu_waits,
cpu_wait_time FROM v$rsrc_consumer_group;
NAMEACTIVE_SESSIONS QUEUE_LENGTH CONSUMED_CPU_WAITS CPU_WAIT_TIME
OLTP__ORDER__ENTRY1029690 467 6709 OTHES__GROUPS 0 059823664089 60425 SYS_GROUP 1
02420704 914 19540 DS.S_QUERIES4245946603004 55700
Which two statements are true?
A. An attempt to start a new session by a user belonging to DSS_QUERIES fails with an error.
B. An attempt to start a new session by a user belonging to OTHE_GROUPS fails with an error.
C. The CPU_WAIT_TIME column indicates the total time that sessions in the consumer group waited
for the CPU due to resource management.
D. The CPU_WAIT_TIME column indicates the total time that sessions in the consumer group waited
for the CPU due to I/O waits and latch or enqueue contention.
E. A user belonging to the DSS__QUERIES resource consumer group can create a new session but
the session will be queued.
Answer: C,E
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NO.8 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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