GIS Geodatabase Design and Management 5

Question 1

What is the effect of setting a feature class to 'archive' in an enterprise geodatabase?

Accepted Answer

A historical record of all edits over time is maintained, enabling query of past states

Answer

Enabling archiving on a feature class causes the geodatabase to maintain a complete change history, allowing users to query the dataset as it existed at any past point in time.

Question 2

In a geodatabase relationship class, what is the 'cardinality' setting used to define?

Accepted Answer

The allowed ratio of origin records to destination records (one-to-one, one-to-many, many-to-many)

Answer

Cardinality defines whether each origin record can relate to one destination record (1:1), multiple destination records (1:M), or whether many-to-many relationships are allowed (M:N).

Question 3

Which best describes the difference between a 'simple' and a 'composite' geodatabase relationship class?

Accepted Answer

Simple relationships allow features to exist independently; composite relationships require destination objects to be owned by the origin

Answer

In a simple relationship, both origin and destination objects can exist independently; in a composite relationship, destination objects are owned by the origin and are deleted when the origin is deleted.

Question 4

What is the correct way to add a new spatial reference to an existing feature class in a geodatabase without data loss?

Accepted Answer

Use the Project tool to reproject the data into a new feature class with the target spatial reference

Answer

The Project geoprocessing tool mathematically transforms coordinates and writes them to a new output feature class with the desired spatial reference, preserving all data.

Question 5

A geodatabase contains a feature dataset. What constraint does this impose on all feature classes added to it?

Accepted Answer

All feature classes must share the same spatial reference (coordinate system)

Answer

All feature classes within a feature dataset must share the same spatial reference so that topological and network relationships between them can be enforced correctly.

GIS - Geographic Information System Practice Test

GIS - Geographic Information System Practice Test

GIS Geodatabase Design and Management 5