Explanation
The QuickSQL shorthand notation departments /insert 4 name /nn location country will do the following:
Create the departments table with 4 columns: The first word in the notation is the table name, followed by a slash and the number of rows to insert. The subsequent words are the column names, separated by spaces. QuickSQL will generate a SQL script to create the table with the specified columns and data types.
Creates an id column as a primary key: QuickSQL will automatically add an id column as a primary key to the table, unless the /no_pk modifier is used. The idcolumn will be of type NUMBER and will use an identity constraint to generate unique values.
Inserts 4 rows of random data into the departments table: QuickSQL will use the /insert modifier to insert random data into the table, based on the column names and data types. The number after the modifier indicates how many rows to insert.
The other option is incorrect because:
Create the departments table with 3 columns: This is not what the notation will do. The notation will create the table with 4 columns, not 3.
Verified References: [Using Quick SQL] [About Quick SQL Shorthand Syntax]

Explanation
From SQL Workshop, you can perform the following actions:
Run SQL commands and scripts: You can use SQL Commands or SQL Scripts components to run individual SQL statements or PL/SQL blocks interactively or in batch mode. You can also view the results, errors, or explain plans of your commands or scripts.
Create and view database objects: You can use Object Browser component to view and manage the database objects in your schema, such as tables, views, indexes, etc. You can also use this component to create new objects, modify existing objects, drop objects, or run object reports.
The other options are incorrect because:
Create an APEX user: You cannot use SQL Workshop to create an APEX user. You can use Workspace Administration component to create and manage users in your workspace.
Delete database: You cannot use SQL Workshop to delete database. You can only delete database objects such as tables or views from your schema.
Verified References: [About SQL Workshop] [Using SQL Commands] [Using SQL Scripts] [Using Object Browser] [Managing Workspace Users]

Explanation
All of the options listed are different kinds of page components that you can create in APEX. A page component is an area of a page that serves as a container for content. Each page component contains a different type of content, such as HTML, a report, a form, a chart, a list, a breadcrumb, PL/SQL, a tree, a URL, or a calendar. You can create page components by using the Create Page Wizard, dragging and dropping from the Gallery pane in Page Designer, or using the context-sensitive menu in the Rendering tree in Page Designer.

Explanation
A bar chart is a type of chart that displays data as horizontal or vertical bars with lengths proportional to the values they represent. A bar chart can have one or more data series, which are groups of data points that share the same color and legend item. To enable "hide and show" behavior of a data series in a bar chart when its corresponding legend item is clicked, you need to set the Hide and Show Behavior attribute value to either Rescale or No Rescaling. The Hide and Show Behavior attribute determines how the chart behaves when a data series is hidden or shown by clicking on its legend item. The possible values are:
None: The chart does not support hiding or showing data series by clicking on legend items.
Rescale: The chart supports hiding or showing data series by clicking on legend items, and rescales the axes accordingly.
No Rescaling: The chart supports hiding or showing data series by clicking on legend items, but does not rescale the axes. Setting the on Data Change attribute value to slide to Left will not affect the "hide and show" behavior of a data series in a bar chart. This attribute determines how the chart behaves when new data is loaded, such as when using dynamic actions or refresh actions. The possible values are:
None: The chart does not animate when new data is loaded.
Slide to Left: The chart slides to the left when new data is loaded.
Slide to Right: The chart slides to the right when new data is loaded. Verified References: [Creating Bar Charts - Oracle Help Center], [Bar Chart Attributes - Oracle Help Center]

Explanation
Oracle APEX is a low-code application development platform that enables developers to build scalable, secure, and data-driven web and mobile apps. Some of the statements that are true about Oracle APEX are:
APEX eliminates middle-tier application logic. APEX runs entirely within Oracle Database and does not require any additional middleware or application server to function. This simplifies the architecture and reduces the complexity, cost, and security risks of deploying applications.
You can build interactive reporting apps based on data from disparate systems. APEX supports various data sources, such as local database, REST Enabled SQL Service, REST Data Source, Web Source Module, etc. You can use these data sources to create interactive reports that allow end users to filter, sort, search, aggregate, and visualize data from different sources.
The other statements are false because:
Application definition is stored in the database. APEX stores the metadata of the application components, such as pages, regions, items, buttons, etc., in the database tables.
Processing and data manipulation is executed in the database. APEX leverages the power and performance of Oracle Database to process and manipulate data using SQL and PL/SQL.
Running an APEX app does not need client software. APEX apps are web-based and can be accessed from any browser on any device without installing any client software. Verified References: [Oracle Application Express (APEX) - Oracle Help Center], [Platform - Oracle APEX]