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1z1-064 PDF DEMO:
QUESTION NO: 1
Examine the command to change a parameter value from the default to 50:
SQL> ALTER SYSTEM SET OPTIMIZER_INDEX_COST_ADJ = 50;
What is the effect of changing the value of the parameter? (Choose the best answer.)
A. It influences the optimizer to use bitmap indexes as the estimated cost of conversion from bitmap to rowid is reduced.
B. It influences the optimizer to use indexes instead of full table scans as the estimated cost of using an index is reduced.
C. It influences the optimizer to always use fast full index scans as the estimated cost of using an index is reduced.
D. It influences the optimizer to use full table scans instead of index scans as the estimated cost of full table scan is reduced.
Answer: B
QUESTION NO: 2
Which two are prerequisites for running the I/O calibration tool? (Choose two.)
A. The database must be in MOUNT state.
B. The disks to be tested must be configured to use asynchronous I/O for data files.
C. The database should be opened in restricted mode.
D. The database instance must be started using an SPFIL
E. For determining latency time, the STATISTICS_LEVEL parameter must be set to TYPICAL or ALL.
Answer: A,D
QUESTION NO: 3
Examine the parameters set for your database instance:
You are administrating a database that supports a DSS workload. You make some changes to the sizes of memory components. Consequently, you receive this error:
Which three actions might resolve the issue?
A. pinning the cursors in the shared pool
B. setting the value of MEMORY_MAX_TARGET to the value of the SGA_MAX_SIZE parameter
C. enabling Automatic Memory Management for the database instance
D. increasing the size of the shared pool
E. setting the PGA_AGGREGATE_TARGET parameter to 0 and the MEMORY_TARGET parameter to the value of the PGA_AGGREGATE_TARGET parameter
F. enabling Automatic Shared Memory Management for the database instance
Answer: B,C,F
QUESTION NO: 4
In which three situations does DB time always increase? (Choose three.)
A. when I/O wait time increases for foreground processes
B. when more connections are made to a database instance
C. when CPU consumption by background processes increases
D. when the host is CPU bound for foreground processes
E. when wait time for data to be sent over a network increases
Answer: A,B,C
QUESTION NO: 5
You are administrating a database that supports an OLTP workload. A few users complain about the poor performance of some SQL statements. You notice that these SQL statements belong to different applications and conclude that there is no correlation between them. You create a SQL
Tuning Set (STS) containing these SQL statements.
What must you do to analyze and generate recommendations for the SQL statements in the STS?
A. Submit the STS as input to the SQL Access Advisor to generate recommendations for SQL profiles.
B. Submit the STS as input to the SQL Performance Analyzer to generate recommendations for creating indexes and materialized views.
C. Submit the STS as input to the SQL Tuning Advisor to generate recommendations for SQL plan baselines.
D. Submit the STS as input to the SQL Tuning Advisor to generate recommendations for indexes or
SQL profiles or both.
Answer: C
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Updated: May 28, 2022