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Oracle Database Administration I Sample Questions (Q114-Q119):

NEW QUESTION # 114
Your database instance is started with a PFILE.
Examine these parameters:

You want to increase the size of the buffer cache.
Free memory is available to increase the size of the buffer cache.
You execute the command:
SQL> ALTER SYSTEM SET DB_CACHE_SIZE=1024M;
What is the outcome?

A. It fails because the SCOPE clause is missing
B. The value is changed only in the PFILE and takes effect at the next instance startup
C. Change is applied to the current instance, but does not persist after instance restart
D. The value is changed for the current instance and in the PFILE

Answer: C

Explanation:
Reference:
https://docs.oracle.com/database/121/SQLRF/statements_2017.htm#SQLRF00902

NEW QUESTION # 115
Which three statements are true about external tables in Oracle 18c and later releases? (Choose three.)

A. The ORACLE_DATAPUMP access driver can be used to unload data from a database into an external table
B. They support UPDATEs but not INSERTs and DELETEs
C. The ORACLE_DATAPUMP access driver can be used to load data into a database from an external table
D. They cannot be partitioned
E. External table files can be used for other external tables in a different database
F. The ORACLE_LOADER access driver can be used to unload data from a database into an external table

Answer: B,E,F

NEW QUESTION # 116
Which two statements are true about undo and undo tablespaces?

A. undo segments are owned by SYSBACKUP.
B. An undo tablespace may be owned by only one instance.
C. An instance will crash if the active undo tablespace is lost.
D. There can be only one undo tablespace created in a database.
E. undo segments are owned by SYSTEM.

Answer: B,C

NEW QUESTION # 117
You need to calculate the number of days from 1st January 2019 until today.
Dates are stored in the default format of DD-MON-RR.
Which two queries give the required output? (Choose two.)

A. SELECT ROUND(SYSDATE ?'01-JAN-2019') FROM DUAL;
B. SELECT TO_CHAR(SYSDATE, `DD-MON-YYYY') ?'01-JAN-2019' FROM DUAL;
C. SELECT ROUND(SYSDATE ?TO_DATE(`01/JANUARY/2019')) FROM DUAL;
D. SELECT SYSDATE ?TO_DATE('01-JANUARY-2019') FROM DUAL;
E. SELECT TO_DATE(SYSDATE, `DD/MONTH/YYYY') ?`01/JANUARY/2019' FROM DUAL;

Answer: A,B

NEW QUESTION # 118
You want to use table compression suitable for OLTP that will:
1. Compress rows for all DML statements on that table
2. Minimize the overheads associated with compression
Which compression option is best suited for this?

A. COLUMN STORE COMPRESS FOR ARCHIVE HIGH
B. ROW STORE COMPRESS ADVANCED
C. COLUMN STORE COMPRESS FOR ARCHIVE LOW
D. COLUMN STORE COMPRESS FOR QUERY LOW
E. ROW STORE COMPRESS BASIC

Answer: B

Explanation:
Explanation/Reference: https://www.oracle.com/technetwork/database/options/compression/advanced-compression-wp-
12c-1896128.pdf

NEW QUESTION # 119
......

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