Explanation
The main components of an APEX workspace homepage are:
Gallery: This component displays various sample applications, blueprints, plug-ins, themes, and learning resources that you can use to get started with Oracle APEX.
SQL Workshop: This component allows you to view and manage the database objects in your schema, such as tables, views, indexes, etc. You can also use this component to run SQL queries or scripts, load or unload data from the database, generate DDL statements, view object reports, and restore dropped objects.
App Builder: This component allows you to create and edit your applications using the Create Application Wizard or the Page Designer. You can also use this component to import or export applications from files or URLs, run or debug applications, manage application settings, and access various utilities.
The other option is incorrect because:
RESTful Services: This component is not part of the APEX workspace homepage. It is part of the SQL Workshop component. It allows you to create and manage RESTful web services based on your database objects or SQL queries.
Verified References: [About the Workspace Home Page] [About SQL Workshop] [About App Builder]

Explanation
To extend the functionality of the form as required, you need to create a dynamic action on P2_JOB that shows or hides P2_HIREDATE and P2_COMM based on its value. The steps are as follows:
Create a dynamic action on P2_JOB by right-clicking it in Page Designer and selecting Create Dynamic Action.
Set Name to Show/Hide Hire Date and Commission.
Set Event to Change.
Set Selection Type to Item(s).
Set Item(s) to P2_JOB.
Set Condition Type to Equal To.
Set Value to SALESMAN.
Add two true actions by clicking the Add True Action button twice.
For the first true action, set Action to Show.
Set Affected Elements > Selection Type to Item(s).
Set Affected Elements > Item(s) to P2_HIREDATE,P2_COMM.
For the second true action, set Action to Show.
Set Fire On Initialization to Yes.
Set Affected Elements > Selection Type to jQuery Selector.
Set Affected Elements > jQuery Selector to label[for="P2_HIREDATE"],label[for="P2_COMM"].
Add two false actions by clicking the Add False Action button twice.
For the first false action, set Action to Hide.
Set Affected Elements > Selection Type to Item(s).
Set Affected Elements > Item(s) to P2_HIREDATE,P2_COMM.
For the second false action, set Action to Hide.
Set Fire On Initialization to Yes.
Set Affected Elements > Selection Type to jQuery Selector.
Set Affected Elements > jQuery Selector to label[for="P2_HIREDATE"],label[for="P2_COMM"].
This dynamic action will show or hide both the page items and their labels depending on whether P2_JOB is equal to SALESMAN or not. Verified References: [Creating a Dynamic Action in Oracle Apex - OrclQA.Com], [Managing Dynamic Actions - Oracle Help Center]

Explanation
To create a chart in Oracle APEX, you need to provide some required fields that define the data source and appearance of the chart. You can use either the Create Page Wizard or Page Designer to create a chart. The required fields for creating a chart are:
Data Source: This field specifies the SQL query that returns the data for the chart. The query must include at least one column for the label and one column for the value of each data point. You can also include additional columns for grouping, color, or tooltip information.
Value Column: This field specifies the column from the data source query that contains the numeric values for the chart. The values are used to plot the data points on the chart and determine the size of each data point or segment.
Name: This field specifies the name of the chart region. The name is used to identify the region in Page Designer and other components, such as dynamic actions or processes.
Label Column: This field specifies the column from the data source query that contains the labels for the chart. The labels are used to display the name of each data point or segment on the chart or in the legend.

Explanation
Data Load Definition is a feature that enables developers to create pages with data loading capability. Users can upload files and load data into tables or collections. Some key features of Data Load Definition are:
The APEX_DATA_LOADING PL/SQL API is available for custom processing. Developers can use this API to programmatically load data by calling an application data loading definition .
Column mapping occurs at design time, removing the burden on end users. Developers can define SQL expressions, SQL queries, lookups, or transformation rules for each data profile column.
Easy workflow for end users: upload the file, verify the preview, and load data. Users can follow a simple three-step process to load data from a file into a table or a collection.
Data Load Definition does not support only XML data format. It also supports CSV, JSON, XLSX, and XML formats.

Explanation
A Progressive Web Application (PWA) is a web application that uses modern web technologies and best practices to provide a native app-like experience to users. Enabling the PWA functionality in your APEX app has the following benefits:
It optimizes page loading speed on a mobile device by caching static resources and using service workers to handle network requests.
It adds a new navigation bar entry named Install App to your app, which allows users to install the app on their device's home screen and access it offline.
It enhances the app's appearance and behavior by using a manifest file to specify the app's name, icon, theme color, orientation, and display mode.
The other options are incorrect because:
To use the PWA feature, the Friendly URLS attribute in the Application Definition, Properties section must be turned On. This attribute enables user-friendly URLs that are required for PWA functionality.
PWA features will not be rendered if the application is served in an unsecured environment. The application must use HTTPS protocol to enable PWA functionality.
You can create a PWA from an existing application or a new application with the Create Application Wizard. You just need to enable the PWA functionality in the User Interface section of the Application Definition.
Verified References: Progressive Web ApplicationsEnabling Progressive Web Application Functionality