DESRI PRO ArcGIS ASSESMENT TEST EXAM 2025/2026
QUESTIONS AND ANSWERS (GRADED A+)
What is LAS data - The LAS dataset is a file in a folder for lidar data and may show surface
characteristics.
What is the difference between a mosaic dataset and a raster catalogue? - A raster dataset requires
you to write the entire raster dataset to disk, whereas a mosaic dataset only references the source
files (such as the LAS dataset), thereby taking up much less space and being much faster to create.
You can also modify the surface type in a mosaic dataset (such as bare earth or first return); however,
a raster dataset can only be stored using one surface type that cannot be altered. Also, you can query
the data held in a mosaic dataset by information such as location and date.
What is the feature class to feature class tool used for? - To create a copy of a feature class without
certain attribute fields.
When should you use the repair geometry data management tool? - To inspect multiple features in a
feature class and automatically fix their geometry. Example: remove duplicate vertex, overlapping
polygons will be dissolved, null geometry values will be deleted.
How to repair broken data links in content panel? - Filter contents by broken data link and select
properties. Change the data source for that layer.
What is the append tool used for? - Use this tool to add new features or other data from multiple
datasets into an existing dataset.
When to use define coordinate system? - When dataset has an unknown or incorrect coordinate
system defined.
What is a projection, transformation and coordinate system? - Projection - A projection is the means
by which you display the coordinate system and your data on a flat surface, such as a piece of paper
or a digital screen.
Coordinate System - a frame of reference for your data, to locate features on the surface of the
earth.
Transformation - convert data between different coordinate systems.
Good process for exporting raster data. - Use the Export Raster Data dialog box.
, What is the difference between short integer and long integer? - Short integer is -32,768 to 32,767
only. Long integer can be used for larger integers.
What is raster pyramids used for? - Displaying large rasters more efficiently.
What type of geodatabases are there and what are they used for? - Personal Geodatabase - 2 GB
max, single user. (File)
File geodatabase - up to 1 TB, small workgroups. (File)
Enterprise Geodatabase - No limit (DBMS Limit), multiple users and writers, hosted on a server.
What is a relationship class used for? - Maintaining associations between objects. Great to use for
parent child relationships.
How can you fix topology errors with ArcMap? - Use the error inspector or right click and select fix
topology on the exclamation mark.
What are cached layers and what are they good for? - They are prerendered collecions of map
cartography or 3D objects organized by location and scale. Great for fast efficient visualization online.
(cannot be re projected on the fly)
What is crowd source manager web app used for? - Managing crowdsourced information and update
attributes such as status and assignment.
What is the aggregate points (online) tool used for? - Figuring out which points fall within each area
and then calculating statistics about the area.
What is Join Features (online) tool used for? - This tool transfers the attributes of one layer or table
to another based on spatial and attribute relationships. Example: join crime data to police districts.
What is the Summarize Nearby (online) tool used for? - Finds features within a specific distance of
other features. Example: Calculate the total population within five minutes of driving time of a
proposed new store location.
QUESTIONS AND ANSWERS (GRADED A+)
What is LAS data - The LAS dataset is a file in a folder for lidar data and may show surface
characteristics.
What is the difference between a mosaic dataset and a raster catalogue? - A raster dataset requires
you to write the entire raster dataset to disk, whereas a mosaic dataset only references the source
files (such as the LAS dataset), thereby taking up much less space and being much faster to create.
You can also modify the surface type in a mosaic dataset (such as bare earth or first return); however,
a raster dataset can only be stored using one surface type that cannot be altered. Also, you can query
the data held in a mosaic dataset by information such as location and date.
What is the feature class to feature class tool used for? - To create a copy of a feature class without
certain attribute fields.
When should you use the repair geometry data management tool? - To inspect multiple features in a
feature class and automatically fix their geometry. Example: remove duplicate vertex, overlapping
polygons will be dissolved, null geometry values will be deleted.
How to repair broken data links in content panel? - Filter contents by broken data link and select
properties. Change the data source for that layer.
What is the append tool used for? - Use this tool to add new features or other data from multiple
datasets into an existing dataset.
When to use define coordinate system? - When dataset has an unknown or incorrect coordinate
system defined.
What is a projection, transformation and coordinate system? - Projection - A projection is the means
by which you display the coordinate system and your data on a flat surface, such as a piece of paper
or a digital screen.
Coordinate System - a frame of reference for your data, to locate features on the surface of the
earth.
Transformation - convert data between different coordinate systems.
Good process for exporting raster data. - Use the Export Raster Data dialog box.
, What is the difference between short integer and long integer? - Short integer is -32,768 to 32,767
only. Long integer can be used for larger integers.
What is raster pyramids used for? - Displaying large rasters more efficiently.
What type of geodatabases are there and what are they used for? - Personal Geodatabase - 2 GB
max, single user. (File)
File geodatabase - up to 1 TB, small workgroups. (File)
Enterprise Geodatabase - No limit (DBMS Limit), multiple users and writers, hosted on a server.
What is a relationship class used for? - Maintaining associations between objects. Great to use for
parent child relationships.
How can you fix topology errors with ArcMap? - Use the error inspector or right click and select fix
topology on the exclamation mark.
What are cached layers and what are they good for? - They are prerendered collecions of map
cartography or 3D objects organized by location and scale. Great for fast efficient visualization online.
(cannot be re projected on the fly)
What is crowd source manager web app used for? - Managing crowdsourced information and update
attributes such as status and assignment.
What is the aggregate points (online) tool used for? - Figuring out which points fall within each area
and then calculating statistics about the area.
What is Join Features (online) tool used for? - This tool transfers the attributes of one layer or table
to another based on spatial and attribute relationships. Example: join crime data to police districts.
What is the Summarize Nearby (online) tool used for? - Finds features within a specific distance of
other features. Example: Calculate the total population within five minutes of driving time of a
proposed new store location.
