IT Certification Exam Questions & Answers

Explanation
d event under the Drag and Drop PL/SQL Code attribute of the Calendar component. This attribute allows you to write PL/SQL code to update the event row in the database after the user drags and drops an event on the calendar. To reference the ID, the new start date, and the new end date of the dragged event, you can use these bind variables: :APEX.PK_VALUE, :APEX.NEW_START_DATE and :APEX.NEW_END_DATE. These variables are automatically populated by APEX when the user performs a drag and drop action on the calendar. For example, you can write something like this:
UPDATE events
SET start_date = :APEX.NEW_START_DATE,
end_date = :APEX.NEW_END_DATE
WHERE id = :APEX.PK_VALUE;

Explanation
The “Create an Application From a File” wizard is a tool that allows developers to create an application based on an existing spreadsheet file or sample data set. Some of the statements that are true about loading data from this wizard are:
A sample data set from the sample list can be uploaded. You can use the Sample Data Sets option to select a predefined data set from a list of available samples, such as Employees, Products, Projects, etc.
CSV, XLSX, XML, TXT, or JSON files can be uploaded. You can use the Upload a File option to upload a spreadsheet file in one of these formats and create an application based on its data. You cannot upload seed data from a SQL script, paste and load XML and JSON data, or upload data from remote web services using this wizard. You can use other features in App Builder or SQL Workshop to perform these actions, such as SQL Scripts, RESTful Services, etc. VerifiedReferences: [Creating an Application From a File – Oracle Help Center], [Creating an Application Based on Sample Data Sets – Oracle Help Center]

Explanation
Universal Theme has many features that make it an ideal user interface for Oracle APEX applications. Three of the key features of Universal Theme are:
Versatile UI Components: Universal Theme provides a rich set of UI components that can be used to create interactive and engaging applications. Some of the UI components include cards, lists, charts, calendars, maps, timelines, accordions, tabs, modals, alerts, and more.
Responsive Design: Universal Theme adapts to different screen sizes and devices using CSS media queries and grid layout. It ensures that the applications look good and work well on any device, from desktops to tablets to smartphones.
Easy Customization: Universal Theme allows developers to customize the appearance and behavior of their applications using template options and theme styles. Template options enable developers to apply different styles to components on a page without writing custom code. Theme styles enable developers to change the overall look and feel of the application by choosing from a variety of pre-built styles or creating their own.

Explanation
A page item is a component that is part of an HTML form and can accept user input or display output. There are many types of page items that can be placed on a page in APEX, such as text fields, text areas, radio groups, checkboxes, date pickers, select lists, popup LOVs, shuttles, and so on. Each type of page item has different properties and attributes that affect its appearance and functionality. Three of the types of page items that can be placed on a page are:
Checkbox: A checkbox is a page item that displays one or more options that can be selected or deselected by the user. A checkbox can have either static values or dynamic values based on a list of values (LOV). A checkbox can also have different display styles, such as pill button or switch.
Date Picker: A date picker is a page item that displays a text field with an icon that opens a calendar popup when clicked. A date picker allows users to enter or select a date value in a specific format. A date picker can also have different attributes, such as minimum or maximum date, display format, or time picker.
Select List: A select list is a page item that displays a drop-down list of options that can be selected by the user. A select list can have either static values or dynamic values based on a list of values (LOV). A select list can also have different attributes, such as multiple selection, null value display text, or cascading LOV.

Explanation
A calendar is a type of component that enables users to view and manage data based on dates. A calendar can display data in different views, such as monthly, weekly, daily, or list. Users can also interact with the calendar by creating, editing, or deleting events, or by using drag and drop functionality. Three of the features of a calendar in Oracle APEX are:
Next – Navigates to the next month. This feature allows users to move forward in time and see the events for the following month.
Previous – Navigates to the previous month. This feature allows users to move backward in time and see the events for the previous month.
Month, Week, Day – Displays a monthly, weekly and daily view. These features allow users to switch between different views of the calendar and see the events for a specific month, week, or day.

Explanation
Oracle APEX is a low-code development platform that enables you to build database-centric web applications using only a web browser. Oracle APEX has the following features:
Requires no additional client software. A web browser is the app development IDE: You can use any modern web browser to access the Oracle APEX development environment and build your applications.
You do not need to install or configure any additional software or tools on your client machine.
Is declarative. It requires no code generation: You can use declarative tools, visual editors, drag-and-drop components, and pre-built templates to define your application logic, user interface, security, and integration features. You do not need to write or generate any code for your applications.
The other options are incorrect because:
Performs the data processing in a middle-tier server: Oracle APEX performs the data processing in the database server. It uses SQL and PL/SQL to access and manipulate the data stored in the database. It does not rely on any middle-tier server or framework for data processing.
Requires developers to be proficient in Java, Python and other programming languages: Oracle APEX does not require developers to be proficient in Java, Python or other programming languages. It uses SQL and PL/SQL as the primarylanguages for data processing. It also supports HTML, CSS, JavaScript, and jQuery for user interface development.
Verified References: [About Oracle APEX] [Oracle APEX Architecture]

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
REST Data Source Synchronization is a feature that enables developers to automatically sync the contents of a local table with the data from an external REST service. To execute REST source synchronizations on schedule, the CREATE JOB privilege must be granted to the application’s parsing schema, which allows APEX to create a DBMS_SCHEDULER job for each scheduled synchronization task. If the local table is not in sync with the Data Profile, which defines the columns and data types of the REST service response, Data Synchronization continues to work for columns present in both the table and the Data Profile (other columns are ignored). However, APEX generates SQL DDL statements to sync table columns back to the Data Profile, which can be added to the application as supporting objects. Verified References: Managing Data Synchronization – Oracle Help Center, Synchronize Data from REST Services to Local Table – Oracle Blogs

Explanation
The table creation script produced by Quick SQL is:
create table emp_salary ( id number generated by default on null as identity constraint emp_salary_id_pk primary key, name varchar2 (255 char) not null, salary number, commission_yn varchar2 (1 char) check (commission_yn in (‘Y’,’N’)) default ‘N’ not null ); The commission_yn column will default to ‘N’ because of the default clause in the column definition. It will also restrict acceptable values to ‘Y’ or ‘N’ because of the check constraint. The other options are incorrect because they do not match the output of Quick SQL. Verified References: Using Quick SQLAbout Quick SQL Shorthand Syntax

Explanation
APP_USER is a built-in substitution string in Oracle APEX that stores the user name of the current user session. The APEX engine uses APP_USER as one component of a key for tracking each user’s session state.
As a user navigates from page to page, the APEX engine sets the value of APP_USER to identify the user. The APEX engine also uses APP_USER to perform security checks and conditional processing. You can reference APP_USER using different syntax depending on the context, such as SQL, PL/SQL, or static text.

Explanation
Faceted Search is a feature 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. Faceted Search supports the ability to filter columns storing multiple values as one string, such as comma-separated values or JSON arrays, by using the Split Values attribute. Facets map to specific database columns or expressions that are defined in the Data Source attribute of the faceted search region. The other statements are false because Faceted Search supports displaying multiple charts in the same region by using the Chart View attribute, and a facet’s chart can be seen either in a nonmodal dialog or inline by using the Chart Display Mode attribute. Verified References: [Creating Faceted Search Pages – Oracle Help Center], [Facet Attributes – Oracle APEX]

Explanation
You can access the Shared Components page from two places in App Builder: the Page Designer and the Application home page. In Page Designer, you can click on the Shared Components icon at the top of the page to open the Shared Components page in a new tab5. In the Application home page, you can click on the Shared Components link in the center of the page to navigate to the Shared Components page6. Gallery, SQL Workshop, and other pages do not have direct links to the Shared Components page.

Explanation
Automations are a sequential set of PL/SQL actions that are triggered by query results. They are used to monitor data and then perform the appropriate action2. Some use cases of automations are:
Monitoring log tables and raising an alert when there is an issue. For example, an automation can query a log table for any errors and send an email notification to the administrator if any errors are found2.
Approving specific requests. For example, an automation can query a table for any pending requests and approve them automatically based on some criteria2.
Sending email alerts at a particular time of the week. For example, an automation can query a table for any overdue tasks and send a reminder email to the assignees every Monday2.
Deleting a database record based on an end user’s request is not a use case of automations, as it does not involve querying data and triggering actions based on the query results. This can be achieved by using a PL/SQL process or a dynamic action on the page where the user requests the deletion34.

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.

Explanation
Task definitions that exist on the application level in the Shared Components section are made up of all of the following: Participants, Task Settings, Parameters, and Actions. Task definitions are used to define approval workflows for data changes in interactive grids or forms5. Participants are the users or groups who can approve or reject tasks. Task Settings are the properties that control how tasks are created, assigned, and completed. Parameters are the variables that store information about tasks or data changes. Actions are the PL/SQL code blocks that execute when tasks are created, updated, or completed5.