ORACLE OCP 1Z0-042 (Oracle Database 10g: Administration I) 考古題
1. You are connecting to an Oracle database server from a client by using the following connect string:
SQL> CONNECT hr/hr@pdserver.us.oracle.com:1521/proddb
Which naming method is being used in this case?
A.Local Naming
B.Easy Connect
C.External Naming
D.Directory Naming
Answer: B
2. User Scott has updated the salary of one of the employees in the EMPLOYEES table and has not committed the
transaction. What are the two types of locks that this scenario would lead to? (Choose two.)
A.null lock on the row being updated
B.null lock on the table containing the row
C.ROW SHARE lock for the row being updated
D.ROW EXCLUSIVE lock for the row being updated
E.shared row-exclusive lock for the row being updated
F.a shareable table lock for the table containing the row
G.exclusive table-level lock for the table containing the row
Answer: DF
3. You are using the backup scheduler in Enterprise Manager (EM) to schedule a backup of your database.
Which type of script does the backup scheduler generate?
A.SQL script
B.PL/SQL script
C.Operating System (OS) script
D.Enterprise Manager (EM) script
E.Recovery Manager (RMAN) script
Answer: E
4. The data file belonging to the SYSTEM tablespace is corrupted and no backup of the file is available. How do you recover the data file?
A.The data file cannot be recovered.
B.The data file can be restored from the SYSTEM auto backup.
C.Take the tablespace offline, drop, and re-create it.
D.Recovery Manager (RMAN) is used to recover the data file.
E.The ALTER DATABASE CREATE DATAFILE.. command is used to recover the data file.
Answer: A
5. After being hired as a database administrator, you find that there is only one database that is functional and that
is being accessed by the applications. You want to create a replica of the database, to be used for testing purposes.
What is the best method to create the replica?
A.create a database by using CREATE DATABASE .. command and manually copy the data
B.use Database Configuration Assistant (DBCA) to create a template from the existing database to contain the
database structure
C.use DBCA to create a template from the existing database to contain the database structure and then manually
copy the data using Oracle Data Pump
D.use DBCA to create a template from the existing database to contain the database structure with data files and
then use the same template to create the database in the new location
Answer: D
6. You are creating a locally managed tablespace to meet the following requirements:
All the extents should be of the same size.
The data should be spread across two data files.
A bitmap should be used to record the free space within the allocated extents.
Which three options would you choose? (Choose three.)
A.set PCTFREE and PCTUSED to 50
B.specify extent allocation as Uniform
C.specify extent allocation as Automatic
D.create the tablespace as bigfile tablespace
E.create the tablespace as smallfile tablespace
F.set segment space management to Automatic
G.use the RESIZE clause while creating the tablespace
Answer: BEF
7. As a result of performance analysis, you created an index on the prod_name column of the prod_det table,
which contains about ten thousand rows. Later, you updated a product name in the table. How does this change
affect the index?
A.A leaf will be marked as invalid.
B.An update in a leaf row takes place.
C.The index will be updated automatically at commit.
D.A leaf row in the index will be deleted and inserted.
E.The index becomes invalid when you make any updates.
Answer: D
8. Which naming method uses the tnsnames.ora file to store the connect descriptor used by the client while
connecting to the database instance from a remote machine?
A.host naming method
B.local naming method
C.external naming method
D.directory naming method
Answer: B
9. In your database, the snapshot interval is set to 10 minutes for the Automatic Workload Repository (AWR). The database instance is running for the past 30 days.
View the Exhibit to examine the Automatic Database Diagnostic Monitor (ADDM) task.
The ADDM task is performed every 10 minutes, except the last task. What could be the reason for this?
A.The snapshot retention period for the AWR was increased before the last task.
B.The optimizer statistics for few objects in the database were locked before the last task.
C.The STATISTICS_LEVEL initialization parameter was changed to BASIC and reset to TYPICAL before the last task.
D.The optimizer statistics was collected manually by using the DBMS_STATS package before the last task.
Answer: C
10. Your database is configured with the following parameters related to SGA:
SGA_TARGET=256MB
SHARED_POOL_SIZE=32MB
DB_CACHE_SIZE=100MB
LARGE_POOL_SIZE=0
JAVA_POOL_SIZE=0
STREAMS_POOL_SIZE=0
Which two statements are true about the configuration? (Choose two.)
A.The SGA_TARGET value cannot be sized smaller than 100 MB.
B.The shared pool and the default buffer pool will not be sized bigger than 32 MB and 100 MB, respectively.
C.The shared pool and the default buffer pool will not be sized smaller than 32 MB and 100 MB, respectively.
D.124 MB (256 minus 132) of memory is available for use by all the manually sized components.
E.124 MB (256 minus 132) of memory is available for use by all the manually and automatically sized
components.
Answer: CE
11. Which two statements regarding archive log destinations are true? (Choose two.)
A.A maximum of 10 destinations can be specified.
B.The archive logs must be written to all the destinations.
C.The archive log files can be written only to local destinations.
D.The archiving information can be traced to the alert log file whenever the archiving to a destination is
successful.
E.The number of archiving destinations must be equal to the number of archive processes
Answer: AD
12. Which dynamic performance view would you query to determine the space usage of the Flash Recovery Area?
A.V$RECOVERY_FILE
B.V$RECOVERY_SPACE
C.V$RECOVERY_FILE_DEST
D.V$RECOVERY_FREE_SPACE
Answer: C
13. A user is dropped from the database. Which two statements are true about the objects owned by this user?
(Choose two.)
A.The objects would be deleted permanently.
B.The objects would be placed in the recycle bin.
C.The objects owned by user placed in the recycle bin would be purged.
D.The quota for the user remains until the objects in the recycle bin are purged.
E.The user object would be placed in the recycle bin, and the items in the recycle bin would be purged.
Answer: AC
14. While planning to manage more than one database in your system, you perform the following activities:
1. Organize different categories of files into independent subdirectories.
2. Use consistent naming convention for database files.
3. Separate administrative information pertaining to each database.
Which option corresponds to the type of activities performed by you?
A.Oracle Managed Files
B.Oracle Grid Architecture
C.Optimal Flexible Architecture
D.Oracle database architecture
Answer: C
15. The junior DBA in your organization has accidentally deleted the alert log file. What will you do to create new
alert log file?
A.Create the new text file file as ALERT.LOG.
B.You have to recover the alert log file from the valid backup.
C.Change the value for the BACKGROUND_DUMP_DEST parameter.
D.No action required. The file would be created automatically by the instance.
Answer: D
16. You want a local operating system (OS) user to access the Oracle database in the system without specifying
the username and password.
Which task would you perform to achieve this objective?
A.Create a user in the Oracle database with the same name as that of the OS user, and set the OS_ROLES
parameter to TRUE.
B.Create a user in the Oracle database with the same name and password as that of the OS user, and assign
password authentication.
C.Create a user in the Oracle database with the same name as that of the OS user, prefixed with the value of the
OS_AUTHENT_PREFIX parameter, and assign global authentication.
D.Create a user in the Oracle database with the same name as that of the OS user, prefixed with the value of the
OS_AUTHENT_PREFIX parameter, and assign external authentication.
Answer: D
17. Which three statements are correct about temporary tables? (Choose three.)
A.Indexes and views can be created on temporary tables.
B.Both the data and the structure of temporary tables can be exported.
C.Temporary tables are always created in a user's temporary tablespace.
D.The data inserted into a temporary table in a session is available to other sessions.
E.Data manipulation language (DML) locks are never acquired on the data of temporary tables.
Answer: ACE
18. Which three statements are true about the data dictionary in the Oracle database? (Choose three.)
A.It is owned by the SYS user.
B.It should by modified directly by using SQL commands.
C.It contains the metadata of users, objects, constraints, and storage.
D.It is modified by the Oracle server when object definitions are changed.
E.Read consistency is not guaranteed for SELECT operations on data dictionary views.
Answer: ACD
19. User SCOTT executes the following command on the EMP table but has not issued COMMIT, ROLLBACK, or any data definition language (DDL) command:
SQL> SELECT job FROM emp
2 WHERE job='CLERK' FOR UPDATE OF empno;
SCOTT has opened another session to work with the database. Which three operations would wait when issued in
SCOTT's second session? (Choose three.)
A.LOCK TABLE emp IN SHARE MODE;
B.LOCK TABLE emp IN EXCLUSIVE MODE;
C.DELETE FROM emp WHERE job='MANAGER';
D.INSERT INTO emp(empno,ename) VALUES (1289,'Dick');
E.SELECT job FROM emp WHERE job='CLERK' FOR UPDATE OF empno;
Answer: ABE
20. In the PROD database you have granted the RESUMABLE system privilege to the CONNECT role.
Resumable space operation has been enabled for all user sessions. You want users NOT to be aware of any kind of
space-related problems while performing transactions. Instead, you want the problem to be resolved by a database
trigger automatically.
Which combination of triggering time and event would you use to achieve this objective?
A.AFTER CREATE
B.AFTER SUSPEND
C.BEFORE CREATE
D.AFTER TRUNCATE
E.BEFORE SUSPEND
F.AFTER INSERT OR DELETE OR UPDATE
G.BEFORE INSERT OR DELETE OR UPDATE
='CLERK' FOR UPDATE OF empno;
Answer: B
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