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Oracle Database Administration I Sample Questions (Q35-Q40):

NEW QUESTION # 35
Examine these commands:

Which two statements are true about the sqlldr execution? (Choose two.)

A. It appends data from EMP.DAT to EMP
B. It overwrites data in EMP with data in EMP.DAT
C. It uses the database buffer cache to load data
D. It generates a log that contains control file entries, which can be used with normal SQL*Loader operations
E. It generates a sql script that it uses to load data from EMP.DAT to EMP

Answer: C,E

NEW QUESTION # 36
In the ORCL database, UNDOTBS1 is the active undo tablespace with these properties:
1. A size of 100 MB
2. AUTOEXTEND is off
3. UNDO_RETENTION is set to 15 minutes
4. It has RETENTION GUARANTEE
UNDOTBS1 fills with uncommitted undo 10 minutes after the database opens.
What will happen when the next update is attempted by any transaction?

A. It succeeds and the least recently written undo block of UNDOTBS1 is overwritten by the generated undo.
B. It succeeds and the least recently read undo block of UNDOTBS1 is overwritten by the generated undo.
C. It fails and returns the error message "ORA-30036: unable to extend segment by 8 in undo tablespace 'UNDOTBS1'".
D. It succeeds and the generated undo is stored in SYSAUX.
E. It succeeds and the generated undo is stored in SYSTEM.

Answer: C

Explanation:
To guarantee the success of long-running queries or Oracle Flashback operations, you can enable retention guarantee. If retention guarantee is enabled, the specified minimum undo retention is guaranteed; the database never overwrites unexpired undo data even if it means that transactions fail due to lack of space in the undo tablespace. If retention guarantee is not enabled, the database can overwrite unexpired undo when space is low, thus lowering the undo retention for the system. This option is disabled by default.

NEW QUESTION # 37
Which three statements are true about data block storage in an Oracle Database?

A. An index block can contain row data.
B. A block header contains a row directory pointing to all rows in the block.
C. A table block must always contain row data.
D. A data block header is of a fixed length.
E. Row data is stored starting at the end of the block.

Answer: B,D

NEW QUESTION # 38
Examine this command:

Which two statements are true? (Choose two.)

A. The tablespace containing SALES1.DBF must be altered OFFLINE before executing the command.
B. The tablespace containing SALES1.DBF must be altered READ ONLY before executing the command.
C. If Oracle Managed Files (OMF) is used, then the file is renamed but moved to DB_CREATE_FILE_DEST.
D. The file is renamed and stored in the same location
E. DML may be performed on tables with one or more extents in this data file during the execution of this command.

Answer: B,E

NEW QUESTION # 39
In one of your databases, user KING is:
1. Not a DBA user
2. An operating system (OS) user
Examine this command and its output:

What must you do so that KING is authenticated by the OS when connecting to the database instance?

A. Alter user KING to be IDENTIFIED EXTERNALLY
B. Unset REMOTE_LOGIN_PASSWORDFILE
C. Have the OS administrator add KING to the OSDBA group
D. Set OS_AUTHENT_PREFIX to OPS$
E. Grant DBA to KING

Answer: D

Explanation:
https://oracle-base.com/articles/misc/os-authentication

NEW QUESTION # 40
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