Explanation
Smart Filters is a component that allows end users to filter data by typing keywords in a single search field.
Some of the statements that are true about creating and customizing Smart Filters pages are:
If you create a Smart Filters page based on a table, the filters are auto discovered using the Data Dictionary Cache. You can also manually add or remove filters as needed.
The suggestion chip count is only displayed for filters that support counts, such as LOV-based filter types. For other filter types, such as Input or Range, the count is not displayed. The search results report cannot be displayed as an interactive report or an interactive grid. The supported report types are Classic Report, Cards, Map, or Calendar. Verified References: [Managing Smart Filters - Oracle Help Center],
[Creating Smart Filters Using the Create Page Wizard - Oracle Help Center]

Explanation
The Page Designer Toolbar allows you to perform various actions related to the development of an APEX page. Two of the actions that you can perform are:
Navigate to Shared Components: This option lets you access the shared components of your application, such as lists, breadcrumbs, navigation menus, and so on. You can edit, create, or delete shared components from this option. To access this option, click the icon that resembles a puzzle piece on the Page Designer Toolbar.
Create a new page: This option lets you create a new page for your application using the Create Page Wizard. You can choose from different page types, such as blank page, form, report, chart, calendar, and so on. To access this option, click the icon that resembles a plus sign (+) on the Page Designer Toolbar.

Explanation
A button is a component that performs an action when clicked by the user. A button can have different types, styles, icons, and labels. A button can also have different behaviors, such as submitting the page, redirecting to another page or URL, or doing nothing. A button can perform any of the following actions when clicked:
Redirect to a page in the same application: This action redirects the user to another page within the same APEX application. You can specify the target page number and optionally set some attributes, such as clear cache, request, and item values.
Redirect to a page in a different application: This action redirects the user to another page in a different APEX application. You can specify the target application ID and page number and optionally set some attributes, such as clear cache, request, and item values.
Redirect
to a URL: This action redirects the user to a custom URL that you specify. You can use any valid URL format, such as http://, https://, mailto:, or javascript:.
Submit Page: This action submits the current page to the server and performs any validations, computations, processes, or branches that are defined for the page. You can also specify a request value for the button that can be used to conditionally execute some components.
Defined by Dynamic Action: This action does not submit the page or redirect to another page. Instead, the button's behavior is defined by a dynamic action thatis associated with the button. A dynamic action is a declarative way of defining client-side behavior based on user actions or events.

Explanation
A Link Column is a special column type that you can define for an interactive report to create a link to another page, URL, or custom target. A Link Column is always displayed as the first column in the report, regardless of the order of the columns in the query. A Link Column cannot be sorted, hidden, or moved by an end user using the Actions menu or the column header. However, a developer can change the position and visibility of a Link Column by editing the report attributes in Page Designer.

Explanation
You can create a report with form in Oracle APEX by using either the Create Application Wizard or the Create Page Wizard. The report can be either an interactive report or a classic report, and the form can be either a single row form or a multi row form. The report with form combination enables you to view and edit data from a table or a query in a single page. You can also customize the report and form attributes, such as the columns, regions, buttons, validations, processes, and so on. Verified References: [Creating a Report Using the Create Page Wizard - Oracle], [Creating a Report with Form on Table - Oracle]