Dernières Oracle 1Z0-023 1Z0-054 1Z0-026 1Z0-025 1Z0-024 1Z0-108 examen pratique questions et réponses

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Code d'Examen: 1Z0-023
Nom d'Examen: Oracle (Architecture and Administration)
Questions et réponses: 151 Q&As

Code d'Examen: 1Z0-054
Nom d'Examen: Oracle (Oracle Database 11g: Performance Tuning)
Questions et réponses: 192 Q&As

Code d'Examen: 1Z0-026
Nom d'Examen: Oracle (Network Administration)
Questions et réponses: 128 Q&As

Code d'Examen: 1Z0-025
Nom d'Examen: Oracle (Backup and Recovery)
Questions et réponses: 127 Q&As

Code d'Examen: 1Z0-024
Nom d'Examen: Oracle (Performance Tuning)
Questions et réponses: 92 Q&As

Code d'Examen: 1Z0-108
Nom d'Examen: Oracle (Oracle WebLogic System Administration)
Questions et réponses: 141 Q&As

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NO.1 Which three statements about rebuilding indexes are true? (Choose three)
A. The ALTER INDEX REBUILD command is used to change the storage characteristics of an
index.
B. Using the ALTER INDEX REBUILD is usually faster than dropping and recreating an index
because it uses the fast full scan feature.
C. Oracle8i allows for the creation of an index or re-creation of an existing index while allowing
concurrent operations on the base table.
D. When building an index, the NOLOGGING and UNRECOVERABLE keywords can be used
concurrently to reduce the time it takes to rebuild.
Answer: A, B, C

Oracle examen   certification 1Z0-024   1Z0-024

NO.2 What are two main OLTP requirements? (Choose two)
A. Use bind variables rather than literals in your SQL code.
B. Analyze your tables regularly to refresh optimizer statistics.
C. Create multiple small rollback segments as opposed to a few big ones.
D. Create indexes on all columns that are regularly used in query predicates.
E. Set up appropriate default storage parameter values for dynamic (implicit) space allocation.
Answer: B, C,

certification Oracle   certification 1Z0-024   1Z0-024 examen

NO.3 What is the least number of buffers an LRU latch must cover in the database buffer cache?
A. 5
B. 10
C. 30
D. 50
E. 100
Answer: D

Oracle   certification 1Z0-024   1Z0-024 examen   1Z0-024   1Z0-024 examen

NO.4 When a deadlock shutdown is detected by Oracle, where is the trace file generated?
A. SQL_TRACE
B. TRACE_DEST
C. USER_DUMP_DEST
D. CORE_DUMP_DEST
E. BACKGROUND_DUMP_DEST
Answer: C

Oracle   certification 1Z0-024   1Z0-024 examen

NO.5 Which dynamic view is most useful for determining the current number of blocks allocated
to a buffer pool?
A. V$CACHE
B. V$SESS_IO
C. V$SYSSTAT
D. V$BUFFER_POOL
Answer: D

Oracle   1Z0-024 examen   1Z0-024   1Z0-024

NO.6 If a willing-to-wait latch request is satisfied on the first attempt, which statistic gets
incremented?
A. GETS
B. SLEEPS
C. MISSES
D. IMMEDIATE_GETS
E. IMMEDIATE_ MISSES
F. IMMEDIATE_GETS
Answer: A

Oracle   1Z0-024   1Z0-024   1Z0-024 examen   1Z0-024 examen

NO.7 Which two statements about plan stability and stored outlines are true? (Choose two)
A. You can group outlines in categories.
B. You can only have one stored outline per SQL statement.
C. Plan stability works only when SQL statements match.
D. Stored outlines are saved in the data dictionary (SYS schema)
E. Stored outlines become invalid when you analyze the associated objects.
Answer: A, C

certification Oracle   1Z0-024 examen   certification 1Z0-024

NO.8 What will this statement do?
CREATE TABLESPACE temp
DATAFILE 'C:\database\temp.dbf' SIZE 10n
Temporary;
A. Create a tablespace that will be dropped on instance shutdown.
B. Create a tablespace in which the user can create segments for usage during sorts.
C. Create a tablespace in which oracle can create segments for usage during sorts.
D. Create a tablespace in which a user can create tables that will be automatically dropped after a
week
Answer: C

Oracle   1Z0-024 examen   1Z0-024

NO.9 For which reason would you query V$SYSSTAT?
A. Name of the sort segment.
B. Free space available for a sort segment.
C. Number of disk sorts performed since startup.
D. Number of users active on individual sort segments.
Answer: C

Oracle   1Z0-024 examen   1Z0-024

NO.10 Which two views can be sued to detect lock contention? (Choose two)
A. V$LOCK
B. V$LOCKED_OBJECT
C. V$LOCK_CONTENTION
Answer: A, B

Oracle   1Z0-024   1Z0-024   certification 1Z0-024

NO.11 What does this statement do?
SQL>ANALYZE INDEX index_name VALIDITY STRUCTURE;
A. It places information into the INDEX_STATS view and allows for the monitoring of space
used by an index.
B. It provides information in the INDEX_HISTOGRAM view to indicate whether an index is
invalid or valid.
C. It provides information in the DBA_INDEXES view for the COST BASED Optimizer when
choosing an execution plan.
Answer: A

Oracle examen   1Z0-024 examen   1Z0-024

NO.12 Which tablespace is used as the temporary tablespace if 'TEMPORARY TABLESPACE' is
not specified for a user?
A. TEMP
B. DATA
C. SYSTEM
D. ROLL-BACK
Answer: C

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NO.13 When performing a sort operation, you notice that there are a large number of sorts
requiring I/O to the disk. Which parameter could be increased to allow more sorts to be
performed in memory?
A. SORT_AREA_SIZE
B. LARGE_POOL_SIZE
C. SORT_AREA_RETAINED_SIZE
D. SORT_MULTIBLOCK_READ_COUNT
Answer: A

certification Oracle   1Z0-024   1Z0-024   1Z0-024

NO.14 Which type of transaction should you assign to a specific large rollback segment?
A. Batch jobs that modify many rows.
B. Long running serializable transactions.
C. Long running reports, to avoid 'snapshot too old' errors.
D. Discrete transactions that modify many rows in the same block.
Answer: A

Oracle   1Z0-024 examen   1Z0-024   1Z0-024   1Z0-024

NO.15 The database includes tables with static data, which are used for queries only. To which
size should you set PCTFREE for this type of table?
A. 0
B. 50
C. 20
D. 10
Answer: A

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NO.16 Which three types of statistics are reported in report.txt after running UTLESTAT SQL?
(Choose three)
A. Locking statistics.
B. Memory usage statistics.
C. Explain plan statistics.
D. Library cache statistics.
E. Buffer busy wait statistics.
F. Rollback contention statistics.
Answer: D, E, F

certification Oracle   1Z0-024 examen   1Z0-024   1Z0-024   1Z0-024

NO.17 In which two ways can you reduce the amount of sorting that is performed? (Choose two)
A. By using UNIONinstead of UNION ALL.
B. By using NOSORT when creating tables.
C. By using NOSORT when creating indexes.
D. By using COMPUTE instead of ESTIMATE when analysing objects.
E. By reducing the number of users that have the sort privilege.
F. By creating appropriate indexes on tables that are joined often.
Answer: C, F

Oracle   1Z0-024   1Z0-024

NO.18 Which statement could require a sort?
A. SELECT DISTINCT dept_ID FROM emp;
B. UPDATE emp SET salary=salary*1.1 WHERE id 7722;
C. SELECT emp_id, nameFROM emp WHERE emp-id = 7722;
D. SELECT emp_id, nameFROM emp WHERE emp-id = BETWEEN 7722 and 7100 ;
Answer: A

certification Oracle   1Z0-024 examen   1Z0-024

NO.19 Which three statements about improving the performance of the database buffer cache by
creating multiple buffer pools are true? (Choose three)
A. One, two, or three pools may be defined.
B. There are at least 50 blocks per LRU latch for
each pool.
C. Each buffer pool is assigned latches taken from DB_BLOCK_LRU_LATCHES.
D. The size of the DEFAULT pool is obtained by adding all the pools to the value of the
DB_BLOCK_BUFFERS parameter.
Answer: A, B, C

Oracle   certification 1Z0-024   1Z0-024   1Z0-024   certification 1Z0-024

NO.20 Which action could potentially cause checkpoints to take longer?
A. Increasing the number of redo log groups.
B. Increasing the size of rollback segments.
C. Decreasing the value of the REDO_LOG_BUFFERS parameter.
D. Increasing the value of the FATS_START_IO_TARGET parameter.
Answer: D

certification Oracle   1Z0-024   1Z0-024   1Z0-024

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Code d'Examen: 1Z0-026
Nom d'Examen: Oracle (Network Administration)
Questions et réponses: 128 Q&As

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NO.1 If a password is configured, which command must be issued first when you need to
stop the listener?
A. Stop
B. Password
C. Set Password
D. Shutdown immediate
Answer: C

certification Oracle   certification 1Z0-026   1Z0-026   1Z0-026 examen   certification 1Z0-026

NO.2 Which statement is true regarding connection breaks?
A. In-band breaks are faster than out-band breaks.
B. In-band breaks use messages that invoke operating system signals.
C. In-band breaks are issued to the server process by the operating system.
D. Out-band breaks send urgent data messages and are faster than in-band breaks.
E. There are no fundamental differences between in-band breaks and out-band breaks.
Answer: D

Oracle   1Z0-026 examen   certification 1Z0-026   1Z0-026 examen   certification 1Z0-026

NO.3 Which naming method simplifies administrative tasks when configuration changes
need to be made available to all clients immediately?
A. Host Naming
B. Local Naming
C. Service Naming
D. Centralized Naming
Answer: D

Oracle   1Z0-026   1Z0-026   1Z0-026 examen

NO.4 The listener audit trail provides information about every client connection request.
Which additional request about the client is NOT provided?
A. Client user ID
B. Database user name
C. Network protocol
D. Client host (platform)
Answer: B

Oracle   1Z0-026 examen   1Z0-026   certification 1Z0-026   certification 1Z0-026

NO.5 You are using host naming. Which components need to be installed?
A. Net8 on the server and the client machine.
B. TCP/IP and Net8 only on the client machine.
C. TCP/IP and Net8 only on the server machine.
D. TCP/IP and Net8 on the server and the client machine.
Answer: D

certification Oracle   1Z0-026 examen   1Z0-026

NO.6 You setup MTS for the PROD database, which uses multiple listeners to handle
requests. Which listener control command can you issue for each listener that the
dispatchers have registered with all listeners used by the database?
A. DISPATCHER<listener name>
B. SHOW ALL
C. SERVICES<listener name>
D. SHOW SERVICES<listener name>
E. SHOW DISPATCHER<listener name>
Answer: C

Oracle examen   1Z0-026 examen   1Z0-026   1Z0-026

NO.7 A DBA has installed and configured Net8 TCP/IP on the client and the server but is
still unable to connect from Windows NT Workstation using SQL*Plus to an Oracle
instance running on a remote UNIX server. However there are no problems when
using FTP between two nodes. What actions next taken by the DBA could make
progress towards diagnosing the problem?
A. Attempting to PING the server from the client.
B. Checking to see if the DNS configuration is correct.
C. Connecting by using the Net8 Assistant Test Connection feature.
D. Checking to see if the TNS ping process is running on the server.
Answer: C

Oracle   certification 1Z0-026   1Z0-026

NO.8 Which two are tasks of the dispatcher process? (Choose two)
A. Receiving connection requests.
B. Placing a request in the request queue.
C. Updating the listener with new LOAD values.
D. Determining if the client request can be processed.
Answer: B, C

Oracle   1Z0-026 examen   1Z0-026   1Z0-026 examen   1Z0-026   certification 1Z0-026

NO.9 Which folder would you use in the Net8 Assistant Tool to change the naming
method?
A. Profile
B. Configuration
C. Service Names
D. Oracle Names Server
Answer: A

Oracle examen   1Z0-026 examen   1Z0-026 examen

NO.10 How many response queues are present in a multithreaded server environment?
A. One per system.
B. One per database.
C. One per listener.
D. One per dispatcher.
Answer: D

Oracle   1Z0-026   1Z0-026   1Z0-026 examen

NO.11 When is the request sent to a listener?
A. After every call.
B. Before every call.
C. After name resolution.
D. Before name resolution.
Answer: C

Oracle examen   1Z0-026   1Z0-026   1Z0-026   1Z0-026 examen

NO.12 Which parameter specifies the maximum number of server processes that get
pre-spawned in a dedicated server environment? (Do not use any extra words or
characters)
Answer: MTS_MAX_SERVERS

NO.13 Which process picks up a request from a response queue?
A. Client process
B. Listener process
C. Dispatcher process
D. Shared server process
Answer: C

Oracle examen   1Z0-026 examen   1Z0-026   certification 1Z0-026   certification 1Z0-026

NO.14 Which statement regarding the logging and tracing of Net8 is True?
A. Logging cannot be disabled on client.
B. There are four levels of logging that can be set.
C. Tracing can take up significant disk space but has little impact on performance.
D. There is no way to prevent new trace data from being appended to the same file with
each new session.
Answer: B

certification Oracle   1Z0-026   1Z0-026

NO.15 Which NAMESCTL command can be used to manually force Names Server discovery?
A. Flush
B. Reload
C. Reorder_NS
D. Discover_NS
E. Start_client_cache
Answer: C

Oracle   certification 1Z0-026   1Z0-026 examen

NO.16 In which file is the information that host naming is enabled stored?
A. Init.ora
B. Sqlnet.ora
C. Tnsnames.ora
D. Listener.ora
Answer: B

Oracle examen   certification 1Z0-026   1Z0-026   certification 1Z0-026   1Z0-026   certification 1Z0-026

NO.17 Which feature needs to be configured in Connection Manager to enable your system to
scale to a large number of users?
A. Connection Pooling
B. Network access control
C. Connection concentration
D. Multiple protocol interchange
Answer: C

Oracle examen   1Z0-026   certification 1Z0-026   1Z0-026   certification 1Z0-026

NO.18 Which are two features of Connection Manager? (Choose two)
A. Connection exchange.
B. Connection resolution.
C. Connection multiplexing.
D. Connection cross-linking.
E. Protocol transformation.
F. Protocol interchange capability.
Answer: C, F

Oracle examen   1Z0-026   1Z0-026   1Z0-026   1Z0-026

NO.19 When configuring for multiple protocol interchange, what does Source_Route
indicate?
A. Enables connections through Connection Manager.
B. Identifies the service name to which the connection needs to be established.
C. Identifies the database SID to which the connection needs to be established.
D. Identifies the node and the port number on which connection manager is running.
Answer: A

Oracle   1Z0-026 examen   1Z0-026   1Z0-026

NO.20 The initial number of dispatchers is set to 50. Because of the load on the dispatcher
processes the DBA needs to decrease the number of dispatchers. Which two
recommended procedures could be used? (Choose two)
A. Issue the ALTER SYSTEM command to remove dispatchers.
B. Issue the ALTER SESSION command to remove dispatchers.
C. Edit the MTS_DISPATCHERS parameter and bounce the database.
D. Edit the MTS_MAX_DISPATCHERS parameter and bounce the database.
E. Edit the MTS_MIN_DISPATCHERS parameter and bounce the database.
Answer: A, C

Oracle   1Z0-026 examen   1Z0-026   1Z0-026

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