Palantir Data Engineering Certification
Exam Questions And Answers. Exam Prep
2026
What is the correct sequence of steps to configure a direct connection in Foundry's
managed SaaS platform? - ANSWER-Configure a network egress policy → provision
credentials → create the source in data connection → configure a network policy.
Which connection method should be configured for integrating data from an Azure
storage account into Foundry for optimal uptime? - ANSWER-Direct Connection.
What is the minimum recommended amount of RAM for a Foundry agent host? -
ANSWER-16 GB.
What are two parts of securing a Foundry agent host? - ANSWER-Ensure the agent
host can talk to Palantir and configure the firewall to block all traffic except to desired
destinations.
Which feature of Palantir AIP facilitates seamless integration of data from legacy
systems without modifying existing formats? - ANSWER-Virtual Tables.
What three actions can be performed after successfully syncing a table range from a
Fusion sheet to a dataset in Foundry? - ANSWER-Change the branch of the dataset,
modify the export column type to match desired data types, and rename the synced
dataset.
What open data format is used by default for transformed data in Palantir AIP? -
ANSWER-Parquet.
What are two responsibilities of Action types in the Palantir Ontology? - ANSWER-
Capture data from operators and orchestrate decision-making processes.
What must be ensured to avoid synchronization issues when syncing data from a
Fusion spreadsheet to a dataset in Foundry? - ANSWER-Only use table sync without
any sheet sync in the Fusion sheet.
What condition must be met for future changes in a spreadsheet to be reflected in the
dataset after syncing? - ANSWER-The user must have at least Editor permissions on
the dataset.
What is the most effective approach for parsing semi-structured data like JSON or XML
files in Foundry? - ANSWER-Leveraging custom Python or Java code within the
transform to handle parsing.
,Which role is required to configure network egress policies in Foundry's managed SaaS
platform? - ANSWER-Information Security Officer.
What component enhances security interoperability within Palantir AIP? - ANSWER-
SAML integration for authentication.
What is one method to ensure security in Foundry AIP? - ANSWER-Role-based
permissions.
What is an alternative authentication method used in Palantir AIP? - ANSWER-
Integration with Active Directory.
What should be avoided when configuring a network policy in Foundry? - ANSWER-
Allowing all inbound traffic to facilitate connectivity.
What is the purpose of configuring a network egress policy in Foundry? - ANSWER-To
manage outbound network traffic from the Foundry environment.
What is a necessary step after syncing a Fusion sheet to ensure data integrity? -
ANSWER-Do not delete the original Fusion sheet without ensuring the dataset is
unaffected.
What is the role of metadata services in Palantir AIP? - ANSWER-To manage and
provide context for data integration and usage.
What is the primary function of REST Interfaces in Palantir AIP? - ANSWER-To provide
a standardized way to interact with data services.
What is the significance of using built-in SQL functions in data transformation? -
ANSWER-To efficiently parse and manipulate data directly within the database.
What is the benefit of using a direct connection for data integration? - ANSWER-It
eliminates the need for managing additional infrastructure.
What must be done to ensure that the dataset reflects the latest changes from the
Fusion sheet? - ANSWER-The user must have appropriate permissions and follow the
correct sync procedures.
What is a key advantage of using virtual tables in Palantir AIP? - ANSWER-They allow
for the integration of diverse data formats without altering the original data.
What method is called to publish a model in Foundry's Code Repositories? - ANSWER-
ModelOutput.publish()
,What is the correct syntax to define a compute function that injects a
TransformContext? - ANSWER-def compute(ctx, input, output):
Which Linux operating system version is recommended for hosting a Foundry agent? -
ANSWER-Red Hat Enterprise Linux 8
What are the kinetic elements in the Palantir Ontology? - ANSWER-Actions, Functions
What is a recommended practice for chaining expressions in PySpark? - ANSWER-
Limit chains to a maximum of 5 statements and extract complex logic into separate
functions.
What does the FileSystem.open() method provide in Foundry Transforms? - ANSWER-
A read-only stream without support for seek or tell methods.
What parameter can be used in put_dataset_files() to upload only PDF files? -
ANSWER-ignore_items_not_matching_schema=True
What is essential when implementing pipelines that back ontology objects in Foundry? -
ANSWER-Aligning pipeline logic with the ontology's entity and relationship definitions
and ensuring data transformations preserve semantic relationships.
What feature of Palantir AIP allows data scientists to use existing Jupyter notebooks? -
ANSWER-Code Workspaces
What should you implement to track support requests for a critical data pipeline in
Foundry? - ANSWER-A ticketing system for tracking support requests and resolutions.
What is the first step to set up media sets in your Python transform in Foundry? -
ANSWER-Add a dependency on 'transforms-media' in your code repository.
Which practices are recommended for maintaining a critical data pipeline? - ANSWER-
Create detailed documentation outlining common issues and troubleshooting steps.
What is the correct answer for the essential practices when implementing pipelines? -
ANSWER-Aligning pipeline logic with the ontology's definitions and ensuring data
transformations preserve relationships.
Which type of pipeline in Foundry typically has the lowest compute cost? - ANSWER-
Incremental
What is the purpose of the REST Interfaces feature in Palantir AIP? - ANSWER-To
facilitate integration with external systems.
What does the put_dataset_files() method do? - ANSWER-Uploads files to a specified
dataset in Foundry.
, What is the significance of the ModelAdapter.save() method? - ANSWER-It serializes
the model when publishing.
What should be done to manage discrepancies between data sources and ontology
requirements? - ANSWER-Implement error handling.
What is the benefit of using a ticketing system in data engineering? - ANSWER-To track
support requests and resolutions efficiently.
What is a key feature of Foundry's debugger panel? - ANSWER-Previewing
intermediate dataframes at breakpoints.
What is the correct answer for the behavior of the FileSystem.open() method? -
ANSWER-It provides a read-only stream without support for seek or tell methods.
What should you do to enhance code readability in PySpark? - ANSWER-Isolate each
logical group of transformations into separate code blocks.
What is the purpose of the @initialize_media_set decorator? - ANSWER-To initialize
media sets in your Python transform.
Which of the following are essential practices for maintaining data integrity in Foundry? -
ANSWER-Ensuring that data transformations preserve the integrity of semantic
relationships.
Which schema field type in Foundry requires specifying both precision and scale
parameters? - ANSWER-DECIMAL
What are the three stages included in the condaPackRun task for CI checks in
Foundry? - ANSWER-Download and extract all packages in the solved environment,
Link packages into the environment, Verify package contents
Which Python library is NOT recommended for training models in Foundry's Code
Repositories? - ANSWER-SparkML
What are recommended practices for refactoring complex logical operations in PySpark
transformations? - ANSWER-Extract complex logic into separate functions, Group logic
into named variables, Keep logic expressions inside the same code block to 3
expressions at most
Which decorator should you use to define a Transform that processes input dataframes
in Foundry? - ANSWER-@transform
What should you do to prevent 'join explosion' when performing a left join in PySpark? -
ANSWER-Ensure the join key in the right DataFrame is unique
Exam Questions And Answers. Exam Prep
2026
What is the correct sequence of steps to configure a direct connection in Foundry's
managed SaaS platform? - ANSWER-Configure a network egress policy → provision
credentials → create the source in data connection → configure a network policy.
Which connection method should be configured for integrating data from an Azure
storage account into Foundry for optimal uptime? - ANSWER-Direct Connection.
What is the minimum recommended amount of RAM for a Foundry agent host? -
ANSWER-16 GB.
What are two parts of securing a Foundry agent host? - ANSWER-Ensure the agent
host can talk to Palantir and configure the firewall to block all traffic except to desired
destinations.
Which feature of Palantir AIP facilitates seamless integration of data from legacy
systems without modifying existing formats? - ANSWER-Virtual Tables.
What three actions can be performed after successfully syncing a table range from a
Fusion sheet to a dataset in Foundry? - ANSWER-Change the branch of the dataset,
modify the export column type to match desired data types, and rename the synced
dataset.
What open data format is used by default for transformed data in Palantir AIP? -
ANSWER-Parquet.
What are two responsibilities of Action types in the Palantir Ontology? - ANSWER-
Capture data from operators and orchestrate decision-making processes.
What must be ensured to avoid synchronization issues when syncing data from a
Fusion spreadsheet to a dataset in Foundry? - ANSWER-Only use table sync without
any sheet sync in the Fusion sheet.
What condition must be met for future changes in a spreadsheet to be reflected in the
dataset after syncing? - ANSWER-The user must have at least Editor permissions on
the dataset.
What is the most effective approach for parsing semi-structured data like JSON or XML
files in Foundry? - ANSWER-Leveraging custom Python or Java code within the
transform to handle parsing.
,Which role is required to configure network egress policies in Foundry's managed SaaS
platform? - ANSWER-Information Security Officer.
What component enhances security interoperability within Palantir AIP? - ANSWER-
SAML integration for authentication.
What is one method to ensure security in Foundry AIP? - ANSWER-Role-based
permissions.
What is an alternative authentication method used in Palantir AIP? - ANSWER-
Integration with Active Directory.
What should be avoided when configuring a network policy in Foundry? - ANSWER-
Allowing all inbound traffic to facilitate connectivity.
What is the purpose of configuring a network egress policy in Foundry? - ANSWER-To
manage outbound network traffic from the Foundry environment.
What is a necessary step after syncing a Fusion sheet to ensure data integrity? -
ANSWER-Do not delete the original Fusion sheet without ensuring the dataset is
unaffected.
What is the role of metadata services in Palantir AIP? - ANSWER-To manage and
provide context for data integration and usage.
What is the primary function of REST Interfaces in Palantir AIP? - ANSWER-To provide
a standardized way to interact with data services.
What is the significance of using built-in SQL functions in data transformation? -
ANSWER-To efficiently parse and manipulate data directly within the database.
What is the benefit of using a direct connection for data integration? - ANSWER-It
eliminates the need for managing additional infrastructure.
What must be done to ensure that the dataset reflects the latest changes from the
Fusion sheet? - ANSWER-The user must have appropriate permissions and follow the
correct sync procedures.
What is a key advantage of using virtual tables in Palantir AIP? - ANSWER-They allow
for the integration of diverse data formats without altering the original data.
What method is called to publish a model in Foundry's Code Repositories? - ANSWER-
ModelOutput.publish()
,What is the correct syntax to define a compute function that injects a
TransformContext? - ANSWER-def compute(ctx, input, output):
Which Linux operating system version is recommended for hosting a Foundry agent? -
ANSWER-Red Hat Enterprise Linux 8
What are the kinetic elements in the Palantir Ontology? - ANSWER-Actions, Functions
What is a recommended practice for chaining expressions in PySpark? - ANSWER-
Limit chains to a maximum of 5 statements and extract complex logic into separate
functions.
What does the FileSystem.open() method provide in Foundry Transforms? - ANSWER-
A read-only stream without support for seek or tell methods.
What parameter can be used in put_dataset_files() to upload only PDF files? -
ANSWER-ignore_items_not_matching_schema=True
What is essential when implementing pipelines that back ontology objects in Foundry? -
ANSWER-Aligning pipeline logic with the ontology's entity and relationship definitions
and ensuring data transformations preserve semantic relationships.
What feature of Palantir AIP allows data scientists to use existing Jupyter notebooks? -
ANSWER-Code Workspaces
What should you implement to track support requests for a critical data pipeline in
Foundry? - ANSWER-A ticketing system for tracking support requests and resolutions.
What is the first step to set up media sets in your Python transform in Foundry? -
ANSWER-Add a dependency on 'transforms-media' in your code repository.
Which practices are recommended for maintaining a critical data pipeline? - ANSWER-
Create detailed documentation outlining common issues and troubleshooting steps.
What is the correct answer for the essential practices when implementing pipelines? -
ANSWER-Aligning pipeline logic with the ontology's definitions and ensuring data
transformations preserve relationships.
Which type of pipeline in Foundry typically has the lowest compute cost? - ANSWER-
Incremental
What is the purpose of the REST Interfaces feature in Palantir AIP? - ANSWER-To
facilitate integration with external systems.
What does the put_dataset_files() method do? - ANSWER-Uploads files to a specified
dataset in Foundry.
, What is the significance of the ModelAdapter.save() method? - ANSWER-It serializes
the model when publishing.
What should be done to manage discrepancies between data sources and ontology
requirements? - ANSWER-Implement error handling.
What is the benefit of using a ticketing system in data engineering? - ANSWER-To track
support requests and resolutions efficiently.
What is a key feature of Foundry's debugger panel? - ANSWER-Previewing
intermediate dataframes at breakpoints.
What is the correct answer for the behavior of the FileSystem.open() method? -
ANSWER-It provides a read-only stream without support for seek or tell methods.
What should you do to enhance code readability in PySpark? - ANSWER-Isolate each
logical group of transformations into separate code blocks.
What is the purpose of the @initialize_media_set decorator? - ANSWER-To initialize
media sets in your Python transform.
Which of the following are essential practices for maintaining data integrity in Foundry? -
ANSWER-Ensuring that data transformations preserve the integrity of semantic
relationships.
Which schema field type in Foundry requires specifying both precision and scale
parameters? - ANSWER-DECIMAL
What are the three stages included in the condaPackRun task for CI checks in
Foundry? - ANSWER-Download and extract all packages in the solved environment,
Link packages into the environment, Verify package contents
Which Python library is NOT recommended for training models in Foundry's Code
Repositories? - ANSWER-SparkML
What are recommended practices for refactoring complex logical operations in PySpark
transformations? - ANSWER-Extract complex logic into separate functions, Group logic
into named variables, Keep logic expressions inside the same code block to 3
expressions at most
Which decorator should you use to define a Transform that processes input dataframes
in Foundry? - ANSWER-@transform
What should you do to prevent 'join explosion' when performing a left join in PySpark? -
ANSWER-Ensure the join key in the right DataFrame is unique
