17724755
Description
Quiz by Maggie Samson, updated more than 1 year ago
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Created by Maggie Samson
about 5 years ago
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Question 1
Question
The three general types of errors in a Python script are: (check three)
Answer
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exceptions
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syntax errors
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typos
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geoprocessing waning messages
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logic errors
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traceback
Question 2
Question
Which of the following errors will stop a script from running mid-process, i.e. the script runs, but not all of the code can be executed? (check all that apply)
Answer
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Geoprocessing error
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Syntax error
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Logic error
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Exceptions
Question 3
Question
Which type of error is the most likely to occur as a result of copying/pasting code from other file types, like Word, PDF or HTML?
Answer
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Indentation
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Variable naming errors
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General syntax errors
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Capitalization
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Logic errors
Question 4
Question
When you run a script and a geoprocessing tool fails to run for some reason (e.g. missing data, invalid parameters, not able to write the results, etc.), ArcPy throws a(n) ___exception.
Answer
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ExecuteError
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ToolError
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ArcPyError
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GeoprocessingError
Question 5
Question
Which programming structure is used to handle exceptions in a Python script?
Answer
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for-while
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try-except
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try-else
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if-else
Question 6
Question
Consider the following script:
import arcpy
arcpy.env.workspace = "c:/data"
fieldlist = arcpy.ListFields("roads.shp")
for field in fieldlist:
print field.name + " " + str(field.length)
Which of the following is (are) a function? (check all that apply)
Answer
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ListFields
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name
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str
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workspace
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import
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print
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field
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length
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arcpy
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env
Question 7
Question
Consider the following script:
class LicenseError(Exception):
pass
import arcpy
from arcpy import env
try:
if arcpy.CheckExtension("3D") == "Available":
arcpy.CheckOutExtension("3D")
else:
raise LicenseError
env.workspace = "C:/raster"
arcpy.Slope_3d("elevation", "slope")
except LicenseError:
print "3D license is unavailable"
except:
print arcpy.GetMessages(2)
finally:
arcpy.CheckInExtension("3D")
What does the finally code block accomplish?
Answer
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Check in the license, regardless of whether any exceptions were raised
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Check in the license once the geoprocessing tool has been completed
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Check in the license, regardless of whether the geoprocessing tool resulted in any errors or not
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Check in the license if indeed a license was checked out
Question 8
Question
You typically import a module into a script in order to use its functions. How can you determine where Python looks by default for all the possible locations of this module?
Answer
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import os print os.getcwd()
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import os print os.path
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import sys print sys.path
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import sys print sys.path[0]
Question 9
Question
Classes are like blueprints for how to create objects. Each object created from a class is called a(n) ___ of the class.
Answer
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function
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element
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copy
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instance
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property
Question 10
Question
What is the general syntax to create your own custom function in a script?
Answer
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def <functionname>.<arguments>
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create <functionname>(<arguments>)
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create <functionname>.<arguments>
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def <functionname>(<arguments>)
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