Which of the following statements is true about object-based databases?

They are based on the relational model.

They support inheritance and complex data types.

They use XML as the primary data representation format.

They do not allow the storage of multimedia data.

What is the purpose of using complex data types in object-based databases?

To reduce the storage space required for data.

To provide a standard way of representing data.

To improve the performance of database operations.

To handle structured and semi-structured data efficiently.

In object-oriented databases, what does inheritance refer to?

The process of creating new objects from existing objects.

The process of organizing objects into classes.

The process of associating objects with their attributes.

The process of sharing attributes and behaviors among objects.

Which of the following statements is true about XML in DBMS?

XML is a database management system.

XML is used for storing structured data only.

XML provides a standard way of representing data.

XML is a relational database management system.

What is the main advantage of using object-based databases over relational databases?

Better support for complex data types.

Higher performance in executing complex queries.

Improved data consistency and integrity.

Easier integration with web services.

Which of the following code snippets correctly creates a table with an array data type in SQL?

CREATE TABLE employees (name ARRAY[varchar]);

CREATE TABLE employees (name ARRAY[varchar(255)]);

CREATE TABLE employees (name varchar(255)[]);

CREATE TABLE employees (name ARRAY[]);

What will be the output of the following code snippet? import xml.etree.ElementTree as ET # Create an XML tree tree = ET.ElementTree(ET.fromstring('<book><title>Python Programming</title></book>')) # Get the root element root = tree.getroot() # Print the tag of the root element print(root.tag)

Error: The code will raise an exception.

What will be the output of the following code snippet? import xml.etree.ElementTree as ET # Create an XML tree tree = ET.ElementTree(ET.fromstring('<books><book><title>Book 1</title></book><book><title>Book 2</title></book></books>')) # Get all book elements book_elements = tree.findall('book') # Print the number of book elements print(len(book_elements))

Error: The code will raise an exception.

Which of the following statements is true about the XML format?

It is a self-describing markup language.

It is limited to storing only text data.

It is less flexible than JSON for data representation.

It does not support hierarchical data structures.

Which of the following code snippets correctly defines an object type in an object-based database?

CREATE TYPE Employee AS OBJECT (name VARCHAR(255), age INT);

CREATE OBJECT Employee (name VARCHAR(255), age INT);

CREATE TABLE Employee (name VARCHAR(255), age INT) AS OBJECT;

DEFINE OBJECT TYPE Employee (name VARCHAR(255), age INT);

What is the purpose of using multiset types in SQL?

To store collections of elements without any duplicates.

To improve the performance of complex join operations.

To handle nested and hierarchical data structures.

To enforce referential integrity constraints.

Which of the following statements is true about array types in SQL?

Arrays can be stored in a single column of a table.

Array types can be defined using the CREATE TYPE statement.

Arrays cannot contain elements of different data types.

Arrays support only one-dimensional structures.

Which of the following XML schemas defines the structure of an XML document?

XSLT (Extensible Stylesheet Language Transformations)

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