SAP C_HAMOD_2404 SAP Certified Associate - Data Engineer - SAP HANA Exam Practice Test

If Table B is not pruned in a referential join, the possible issues could be:

C. The Keep flag is activated for the Customer column: This prevents pruning by forcing the inclusion of the column in query execution.

D. Integrity constraint is set to RIGHT: This setting implies that Table B data must always be considered in the join, disabling pruning.

Pruning depends on join conditions and flags; ensuring no unnecessary constraints is essential for proper optimization.

TheDebug Query modein SAP HANA allows you to generate and execute SQL for a specific node in your calculation view. This mode is used to analyze the behavior of individual nodes in a calculation view and troubleshoot issues such as unexpected data output or performance bottlenecks.

In SAP HANA, orphan nodes in a hierarchy are nodes that do not have a parent. To handle orphan nodes, you have the following options:

C. Assign them to an existing node at the root level.

This approach involves assigning orphan nodes to an existing node at the root level, effectively integrating them into the hierarchy.

D. Define them as additional root nodes.

This method treats orphan nodes as separate root nodes, allowing them to exist independently at the top level of the hierarchy.

These options enable you to manage orphan nodes by either integrating them into the existing hierarchy structure or allowing them to exist as independent root nodes, depending on your specific requirements.

Table partitioning in SAP HANA is used to enhance performance and scalability. The main reasons are:

B. To overcome the 2 billion record limit: Partitioning allows the table to handle more than the 2 billion records that are the limit for non-partitioned tables.

D. To improve query performance when accessing large column tables: Partitioning splits the table into manageable parts, allowing parallel processing and improving query performance for large datasets.

TheKeep Flagproperty in an aggregation node ensures that columns not directly requested by a query are still included in the calculation process if they are critical for the correctness of the result. For example, these columns may serve as grouping or filter criteria in intermediate processing stages, even if not explicitly displayed in the final query output.

In a flowgraph, the data source node supports various types of objects for flexibility in data integration:

A. Virtual table: Enables access to remote data sources via Smart Data Access (SDA).

B. Calculation view: Allows using pre-aggregated or calculated data as a source.

D. Synonym: Serves as an alias for database objects, simplifying access to objects across schemas.

Procedures (C) and table functions (E) are not directly used as data sources in flowgraphs.

TheHidden Columnscheckbox in the semantics node is used for the following reasons:

C. To ensure specific columns are NOT exposed to the reporting tool: This prevents unwanted columns from appearing in the reporting layer while retaining their use internally within the calculation view.

D. To remove a column that is also used as a Label column: This hides columns used only for labeling purposes from being directly exposed in the output.

Aremote subscriptionupdates data in a local table based on changes made to a remote table. It monitors changes in the source table and synchronizes those updates with the local target table. This functionality is vital for replication and near-real-time data synchronization scenarios.

When theNull Handlingproperty is set for an attribute in SAP HANA, and no default value is provided, a null value in a column of typeNVARCHARis displayed as an empty string (""). This default behavior ensures clarity in data presentation, especially in text fields where nulls are typically replaced with a blank representation.

To assign a user-provided service to your database module in an XS Advanced project, you configure it in the.yamlfile. This file is used to define the bindings between the project modules and the required services, such as user-provided services for accessing external schemas.

To fill the input parameters of a table function in a calculation view:

Define constant values (A):Assigning constants directly ensures that static values are passed to the table function.

Map columns from lower nodes (D):Input parameters can dynamically take values from columns in lower-level nodes.

Create and map an input parameter (E):Defining an input parameter in the calculation view and mapping it to the table function provides flexibility and parameterization for the logic.

Options B and C are not valid as procedures or hierarchy nodes are not applicable in this context.(Reference: SAP HANA Calculation View Modeling Guide)

TheDynamic Joinoption in SAP HANA calculation views enables flexibility when joining tables with multiple columns. The reasons for enabling it include:

B. To allow data analysis at different levels of granularity with the same calculation view: Dynamic joins adjust to the query’s granularity requirements, enabling analysis at various levels without redesigning the calculation view.

D. To ensure that the join execution uses only the join columns requested in the query: This ensures efficient execution by only processing the relevant columns, reducing unnecessary computations.

The key steps to implement currency conversion in a calculation view are:

Assign Semantic Type:Ensure that the column has the correct semantic type for currency conversion.

Enable the Measure for Conversion:Mark the measure as convertible.

Choose Client, Source, and Target Currencies:Define the currencies involved in the conversion.

Choose Conversion Date and Rate Type:Specify the date and the type of conversion rate (e.g., average, spot rate).

This structured process ensures accurate and consistent currency conversions in your data models.(Reference: SAP HANA Currency Conversion Guide)

TheDEPRECATEDsetting in a calculation view serves the following purposes:

A. To warn developers that the calculation view is no longer supported: Indicates that the view is outdated and should not be relied upon.

B. To indicate that it should not be used as a data source to other calculation views: Prevents new dependencies from being created on the deprecated view.

This setting does not lock the view (C) or redirect queries (D).

The rank node filters and sorts data based on ranking conditions, such as partitioning and ordering. Since the query requests all columns from the rank node, all ranked rows meeting the condition are included in the output. Based on the settings in the graphic (not provided here but assumed from the question's details), the query results in9 rows. Each row adheres to the rank criteria for the partition or grouping in the rank node.

Given the diagram (assumed context) and the analytic privileges (P1 and P2):

Data visible forUS with P1is allowed, as P1 explicitly includes this region.

No other combinations are permissible based on the defined privileges and hierarchy of calculation views.

This restricts the output toUS for P1 only.

Acalculation view query snapshotis arecord of the query statement executedon a calculation view. It captures the SQL query or execution details for analysis or troubleshooting purposes.

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To ensure that each customer name appears only once in the results when combining two tables using a union node, anaggregation nodeshould be added above the union node. The aggregation node consolidates duplicate entries by grouping the data based on unique customer names, effectively removing duplicates.

SQL expressions in a calculation view are used for dynamic data transformations and filtering. They can:

A. Generate a restricted column: Apply conditions to create columns with restricted values.

B. Define a filter: Apply SQL conditions to filter data dynamically.

C. Generate a calculated column: Derive new column values using calculations or expressions.

SQL expressions are not typically used for creating hierarchies (D) or currency conversion (E); these are handled by specific features or nodes in SAP HANA calculation views.

When creating a calculation view that accesses a table in an external schema:

A. Synonym: Synonyms act as aliases to access external schema objects. They are required to integrate external tables into the calculation view.

D. Authorization: You need appropriate schema authorizations to access the external table through the synonym.

A remote source (B) is used for accessing remote systems, and an SQL view (C) is not necessary for this scenario.

The.hdiconfigfile in an XS Advanced project is used to specify whichHDI plug-insare available for use in the project. These plug-ins define how different file types are processed and deployed within the HDI container. For example, plug-ins might be defined for handling calculation views, tables, or sequences.