Free EADA Practice Questions

Question 1

A contractor delivers road features labeled WGS 84 geographic coordinates, but the contractor's survey records confirm that the stored coordinates are WGS 84 / UTM zone 32N in meters. The coordinate values themselves are correct. The required deliverable is a new feature class with WGS 84 longitude and latitude coordinates. What sequence will produce it correctly?

Accepted Answer

Define the source as WGS 84 / UTM zone 32N, then Project it to WGS 84 geographic coordinates.

Answer

Project the features directly to WGS 84 geographic coordinates using the existing source definition.

Answer

Set the map to WGS 84 geographic coordinates and save it without exporting the features.

Answer

Return the data for a replacement survey before attempting to correct its coordinate-system definition.

Question 2

For a stream-restoration inventory, the output must contain only stream portions inside treatment polygons. A stream crossing two polygons must become separate pieces, each carrying its STREAM_ID and the polygon's TREATMENT code. The polygons do not overlap, and no stream follows a polygon boundary. Choose the operation that produces this geometry and attribution together.

Accepted Answer

Intersect the streams and treatment polygons, retaining line output and both inputs' attributes.

Answer

Clip the streams with the treatment polygons, retaining the stream attributes on the resulting pieces.

Answer

Spatially join the polygons to the streams, using one output record for each original stream.

Answer

Select streams that intersect treatment polygons, then export the selected features with their existing attributes.

Question 3

A utility's file-geodatabase worklist must include active assets whose PRESSURE_KPA is below 200, plus active assets with no recorded pressure. Inactive assets must be excluded even when their pressure is null. STATUS is a text field, and PRESSURE_KPA is a nullable numeric field. Which SQL expression selects exactly this worklist?

Accepted Answer

"STATUS" = 'Active' AND ("PRESSURE_KPA" < 200 OR "PRESSURE_KPA" IS NULL)

Answer

("STATUS" = 'Active' AND "PRESSURE_KPA" < 200) OR "PRESSURE_KPA" IS NULL

Answer

"STATUS" = 'Active' AND ("PRESSURE_KPA" < 200 OR "PRESSURE_KPA" = NULL)

Answer

"STATUS" = 'Active' AND ("PRESSURE_KPA" < 200 OR "PRESSURE_KPA" IS NOT NULL)

Question 4

A county's annual road-collision rate falls from 18 to 16 per 1,000 registered vehicles, yet its color becomes darker on the second year's choropleth. Both maps use the same light-to-dark ramp, but natural breaks were calculated separately for each year. The rates use comparable records and denominators. Which revision would allow the same color to carry the same rate meaning in both maps?

Accepted Answer

Apply identical fixed rate breaks and the same color for each corresponding class in both maps.

Answer

Use quantiles separately for each year, with equal numbers of counties per class.

Answer

Use standard-deviation classes based on each year's own mean and spread.

Answer

Divide each rate by its vehicle population again, then classify each year's results separately.

Question 5

A land-cover raster stores 10 for forest, 20 for cropland, and 40 for water. After reprojection with bilinear resampling, some cells contain values such as 15 and 27 that have no category meaning. The original raster is available. How should the replacement output be produced so each resampled value comes from an original category?

Accepted Answer

Reproject the original using nearest-neighbor resampling, assigning each output cell a source-cell value.

Answer

Use cubic resampling instead of bilinear to smooth the transitions between neighboring categories.

Answer

Keep bilinear resampling but round the resulting cell values to the nearest integer.

Answer

Recalculate statistics and rebuild the class labels without changing the interpolated cell values.

Question 6

A public tree-inspection web map lets residents query tree species and condition. Its operational feature layer is shared with Everyone and also contains residents' telephone numbers. Those numbers are hidden in the map's pop-ups, but an anonymous query to the layer still returns them. The city must preserve public access to the approved tree information without exposing telephone numbers. Which publication change meets both requirements?

Accepted Answer

Replace the public layer with an approved-fields-only publication and restrict access to the original layer.

Answer

Disable editing on the public feature layer and hide the telephone field in every map pop-up that uses it.

Answer

Restrict the web map to city staff while leaving its operational feature layer shared with Everyone for other applications.

Answer

Restrict the original feature layer to city staff but leave it as the public map's only operational tree layer.

Question 7

One pipe feature class contains an integer PIPE_TYPE field: 1 means main and 2 means lateral. Under the utility's rules, the numeric DIAM_MM field may range from 100 to 500 for mains and from 25 to 150 for laterals. Thus, 75 mm is permitted for a lateral but not for a main. The utility wants to retain one feature class and validate diameters according to pipe type. Which geodatabase design supports this?

Accepted Answer

Create PIPE_TYPE subtypes and assign the appropriate DIAM_MM range domain to each subtype.

Answer

Assign one 25-to-500 range domain to DIAM_MM and a coded-value domain to PIPE_TYPE.

Answer

Apply a single 100-to-150 range domain to DIAM_MM, using the overlap of the permitted ranges.

Answer

Create separate map layers for mains and laterals and give each layer its own diameter symbology.

Question 8

A scanned utility plan has been georeferenced with an affine transformation. Its control points are clustered in the southwest corner, where the reported fitting RMSE is 0.3 m. Independent surveyed check points elsewhere differ from the transformed plan by 18 to 24 m; the project's acceptance requirement is no more than 5 m at those check points. The source units and coordinate system have been verified. What does this evidence establish?

Accepted Answer

The fit is good at the controls, but the independent checks show that the plan fails acceptance.

Answer

The fitting RMSE demonstrates compliance, so the independent check-point discrepancies can be disregarded.

Answer

The 0.3 m fitting RMSE should be subtracted from each check-point error before deciding whether it is acceptable.

Answer

A higher-order fit that reduces the existing control residuals to zero would prove accuracy across the plan.

Question 9

During a flood response, a bridge used by the road network closes. A previously generated 15-minute drive-time area still assumes that bridge is open. Verified travel times through another, open crossing put some destinations across the river within 15 minutes. The portal supports network analysis with closure barriers. What must be done before this coverage layer supports vehicle deployment?

Accepted Answer

Apply a restriction barrier at the closed bridge and recompute the 15-minute drive-time area.

Answer

Erase the closed bridge's footprint from the existing coverage polygon.

Answer

Exclude all destinations across the river until the closed bridge reopens.

Answer

Replace the result with a straight-line buffer based on average vehicle speed and the same time allowance.

Question 10

An analyst is reviewing a file-geodatabase observation layer before shapefile export. Field names already fit within ten characters. Which pair of source properties is unsupported natively by the shapefile format?

Accepted Answer

True numeric nulls and the time-of-day component of Date values.

Answer

Point geometry and a documented projected coordinate system.

Answer

Six-character text identifiers with leading zeros and numeric measurements such as 12.50.

Answer

Calendar dates without a time component and short integer category codes.

Free EADA Practice Questions

Domain 1: Data Management 35% of exam

Question 1

Question 2

Question 3

Question 4

Domain 2: Data Manipulation 17% of exam

Question 5

Question 6

Domain 3: Visualization 14% of exam

Question 7

Domain 4: Sharing 14% of exam

Question 8

Domain 5: Analysis & Geoprocessing 20% of exam

Question 9

Question 10

That's 10 of 1,030