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1z1-595試験番号:1z1-595 日本語サンプル
試験科目:「Oracle Spatial 11g Essentials」
最近更新時間:2017-11-01
問題と解答:77

>> 1z1-595 日本語サンプル

 

NO.1 When using a partitioned index on a spatially partitioned table, a first level of optimization is
performed making use of SDO_ROOT_MBR in the spatial index metadata. What is this optimization
called?
A. partition pruning
B. hash indexing
C. index elimination
D. partition flux
E. deterministic function selection
Answer: A

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Explanation:
Spatial partition pruning is similar to the pruning the optimizer does, but it is based onlocation and
does not require a partitioning key to be specified on the input query. When a user does a spatial
query using SDO_FILTER, SDO_RELATE, or
SDO_WITHIN_DISTANCE, a query window specifies an area-of-interest. Normally, the minimum
bounding rectangle around that area-of-interest is compared with the minimum bounding rectangles
associated with geometries in a layer using fast searches into the spatial index. When a partitioned
spatial index is used, each partition's index metadata includes a column called SDO_ROOT_MBR,
which contains the minimum bounding rectangle around all of the data in that index partition. At
query time, Spatial indexing examines the SDO_ROOT_MBR column of each partition, and if the MBR
of the area-of- interest does not overlap the SDO_ROOT_MBR, spatial partition pruning will occur and
the index associated with that partition will never be searched.
References: http://download.oracle.com/otndocs/products/spatial/pdf/spatial_wp10_bestprac.pdf,
page 8

NO.2 One of the best ways to optimize queries by using Spatial operators is to always use a ______
as your query window.
A. grid cell
B. NULL
C. circular buffer
D. join
E. polygon
Answer: C

1z1-595 全真   

NO.3 When creating a partitioned spatial index, which syntax parameter determines the number of
parallel processes?
A. AFFINITY
B. NUMCORES
C. DEGREE
D. NUMPROCESSORS
E. PARALLEL_CPUs
Answer: C
Explanation:
Parallel query on multiple partition searching
The degree of parallelism is the value from the DEGREE column in the row for the index in the
USER_INDEXES view (that is, the value specified or defaulted for the PARALLEL keyword with the
CREATE INDEX, ALTER INDEX, or ALTER INDEX REBUILD statement).
References: https://docs.oracle.com/database/121/SPATL/using-partitioned-spatial-
indexes.htm#SPATL586

NO.4 The match mode for a geocoding operation determines how closely the attributes of an input
address must match the data stored in the geocoder schema. Which MATCHMODE attribute would
you use so that the geocoder can deliver results despite any discrepancies in the input address?
A. EXACT
B. Null
C. DEFAULT
D. RELAX_BASE_NAME
E. RELAX_ALL
Answer: C

1z1-595 対策書   
Explanation:
DEFAULT is equivalent to RELAX_POSTAL_CODE, in which the postal code (if provided), base name,
house or building number, and street type can be different from the data used for geocoding.
IncorrectAnswers:
A, E: There are no match modes named RELAX_ALL or NULL.
B:Exact: All attributes of the input address must match the data used for geocoding.
C:RELAX_BASE_NAME:The base name of the street, the house or building number, and the street
type can be different from the data used for geocoding. For example, if Pleasant
Valley is the base name of a street in the data used for geocoding, Pleasant Vale would also match as
long as there were no ambiguities or other matches in the data.
References:
https://docs.oracle.com/cd/B28359_01/appdev.111/b28400/sdo_geocode_concepts.htm

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