Explanation
A faceted search page is a type of page that allows end users to filter data by applying one or more facets. A facet is a set of filters based on a column or expression. By default, when end users select a facet value, they need to click on an Apply button for that facet to apply the filter to the report. To make report filtering automatically executed when any facet value changes, you need to navigate to the faceted search region Attributes, and disable the Batch Facet Changes attribute. The Batch Facet Changes attribute determines whether end users need to click on an Apply button for each facet or not. When this attribute is disabled, the report is automatically refreshed when any facet value changes. The other options are not relevant to the report filtering behavior. Verified References: [Faceted Search Attributes - Oracle Help Center], [Batch Facet Changes - Oracle APEX]

Explanation
Page Designer is a tool that allows developers to create and edit pages in Oracle APEX using a graphical user interface. Page Designer has three main panes: Rendering, Processing, and Property Editor. You can change the layout of Page Designer under Utilities by selecting one of the following options:
Single Pane Mode - This option displays only one pane at a time. You can switch between the Rendering, Processing, and Property Editor panes by using the buttons on the toolbar or the keyboard shortcuts.
Two Pane Mode - This option displays two panes side by side. You can choose which panes to display by using the buttons on the toolbar or the keyboard shortcuts. You can also resize the panes by dragging the splitter bar between them. There is no Three Pane Mode or Four Pane Mode option for Page Designer layout. Verified References: [Managing Pages in Page Designer - Oracle Help Center], [Page Designer Layout Options - Oracle Help Center]

Explanation
The Query Source types for a Navigation Bar List are SQL Query and Function Returning SQL Query. These types allow you to define the list entries using a SQL statement or a PL/SQL function that returns a SQL statement. The other options, Select List and Procedure, are not valid for a Navigation Bar List. Verified References: Create Page Wizard: Navigation Bar List AttributesCreating Lists

Explanation
Plug-ins can be used declaratively in all of the following components in APEX: Dynamic Actions, Regions, Items, Process Type, and Authentication and Authorization Schemes. Plug-ins are shared components that enable developers to extend the native functionality of APEX with custom components1. Plug-ins can be created or imported from the Shared Components page or the App Gallery1.