Attributes within tags in DB2 serve the purpose of providing additional information about the data contained within the tags. This could include metadata such as data types, lengths, or any other relevant details about the data being represented. These attributes enhance the clarity and context of the data within the XML document. 

The Reorg utility in DB2 is responsible for reorganizing the data and indexes within a tablespace or a table to optimize storage allocation and improve performance. During this process, the utility rearranges data pages, rebuilds indexes, and updates statistics, resulting in improved storage efficiency and query performance. By periodically running the Reorg utility, DBAs can ensure that data is stored in the most optimal manner, reducing storage overhead and enhancing overall system performance. 

The SQL command used to create a view in DB2 is CREATE VIEW. This command allows users to define a virtual table based on the result set of a SELECT statement. 

RESTful APIs offer a modern and flexible approach to data access. They facilitate communication between different systems over the internet, allowing clients to interact with databases through standard HTTP methods. With RESTful APIs, developers can access and manipulate data stored in DB2 databases from various platforms and programming languages, fostering interoperability and ease of integration. This approach simplifies application development by providing a uniform interface for accessing database resources, promoting agility and scalability in software development projects. 

The DELETE FROM statement in SQL allows for the removal of records based on specified conditions. These conditions typically involve comparisons between the values in certain columns and specific criteria. 

The correct option is option 4: LOADDD. This option allows the LOAD utility to load data into multiple tables concurrently, thereby improving performance by reducing the time required for data loading operations. This feature is particularly useful in scenarios where data needs to be loaded into multiple related tables simultaneously. 

Indexing is a common technique employed in denormalization to enhance query performance. By creating appropriate indexes on denormalized tables, the database system can quickly locate and retrieve relevant data. 

An advantage of using an IDE like IBM Data Studio is enhanced productivity and collaboration. IDEs provide features like code completion, debugging tools, and integrated version control, which streamline the development process and facilitate team collaboration. 

A cursor in DB2 is primarily used to retrieve rows one at a time from the result set of an SQL query. This allows for sequential processing of the result set, enabling manipulation or analysis of each row individually. Cursors are commonly used in situations where processing each row separately is necessary, such as data validation or complex calculations. 

XML and JSON are both capable of representing hierarchical data structures. In the case of DB2, these data structures can be represented using either XML or JSON data types. Hierarchical data structures are commonly found in XML and JSON formats, making them suitable for representing such structures in DB2.