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Oracle Application Express 4: Developing Web Applications

Question No: 21

Which three are valid process types of a Page Process?

  1. Automatic Row Processing (DML)

  2. PL/SQL

  3. Clear Cache for Items (ITEM, ITEM, ITEM)

  4. Static Assignment

  5. Form Pagination

Answer: A,B,E

Explanation: A: Process Category Data Manipulation:

Data Manipulation process types are frequently used by wizards to support data manipulation language (DML) actions.

Application Builder supports the following declarative B: Process Category PL/SQL:

Runs the PL/SQL you provide. Use this process type to execute a block of PL/SQL entered directly into the process or to simply call an existing API.

E: Process Category: Form Pagination

Implements pagination through the detail records associated with a master detail form.

Note: Processes are logic controls used to execute data manipulation language (DML) or PL/SQL. Processes are executed after the page is submitted.

Reference: Oracle Application Express, Application Builder User’s Guide, Release 3.2, Creating a Page Process

Question No: 22

Which two actions are true about creating lists?

  1. you can track clicks on list entries.

  2. All list templates support hierarchical lists.

  3. Once created; you cannot update the parents of list entries.

  4. you can edit multiple list entries simultaneously.

  5. You can add to a list directly from the page definition page.

    Answer: D,E

    Explanation: D: You can edit multiple list entries simultaneously by clicking Grid Edit on the List

    Entries page.

    E:

    To add a list to a page:

    1. Navigate to the appropriate Page Definition.

    2. On the Page Definition, add a list region:

      *Tree view – Under Page Rendering, right-click Regions and select Create.

  • Component view – Under Region, click the Create icon. The Create Region Wizard appears.

      1. For Region, select List as the region type and click Next.

      2. For Display Attributes, specify the following and click Next

        Etc.

        Reference: Oracle Application Express, Application Builder User’s Guide, Release 3.2, Creating Lists

        Question No: 23

        Which three actions are performed in the detail pane of the Object Browser?

        1. Enable and disable constraints

        2. View the model of a selected table along with all related tables

        3. Write an SQL statement to update data in a table

        4. Restore dropped database objects

        5. Create UI defaults

    Answer: A,B,E Explanation: A: Constraints

    Displays a list of constraints for the current table. Actions you can perform include Create, Drop, Enable, and Disable.

    B: Model

    Displays a graphical representation of the selected table along with all related tables. Related tables are those that reference the current table in a foreign key and those tables referenced by foreign keys within the current table.

    E: UI Defaults

    Displays user interface defaults for forms and reports. User interface defaults enable developers to assign default user interface properties to a table, column, or view within a specified schema.

    Click Edit to edit defined user interface defaults. Click Create to initialize user interface defaults for tables that do not currently

    have user interface defaults defined. See the screenshot below:

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    Note: The Object Browser page is divided into two sections:

    • Object Selection pane displays on the left side of the Object Browser page and lists database objects of a selected type within the current schema. You can further narrow the results by filtering on the object name.

    • Detail pane displays to the right of the page and displays detailed information about the selected object. To view object details, select an object in the Object Selection pane. Click the tabs at the top of the Detail pane to view additional details about the current object. To edit an object, click the appropriate button.

    Reference: Oracle Application Express, SQL Workshop and Utilities Guide Release 3.1.2,About Object Browser

    Question No: 24

    Before the application Installation can proceed, the Installer checks whether the user has required system privileges or not. Where would you specify the required system privileges?

    1. Supporting Objects gt; Build Options

    2. Supporting Objects gt; Validations

    3. Supporting Objects gt; Install

    4. Supporting Objects gt; Prerequisites

    5. Supporting Objects gt; System Requirements

    Answer: D

    Question No: 25

    When a user runs an Oracle Application Express application, how is information identified and preserved from one page view to the next for that user?

    1. Using cookies

    2. Using hidden items and regions in the URL

    3. Using Session IDs

    4. Using session state protection

    5. Using authorization schemes

    Answer: A

    Explanation: Oracle Application Express assigns new session IDs during authentication processing, records the authenticated user#39;s identity with the session ID, and continually checks the session ID in each page request#39;s URL or POST data with the session cookie and the session record in the database. These checks provide users with flexibility and security.

    While the session ID is the key to session state, the session cookie (where applicable) and the session record safeguard the integrity of the session ID and the authentication status of the user.

    Reference: Oracle Application Express Application Builder User#39;s Guide, Understanding Session IDs

    Question No: 26

    View the Exhibit. A Master-Detail page was created. Which option would a developer choose in the Master-Detail wizard to scroll through records in the Master table?

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    1. Include master row navigation.

    2. Master row navigation order.

    3. Secondary navigation order.

    4. Include master report.

    Answer: A

    Question No: 27

    Which two actions can be performed using the Object Browser?

    1. Browse database objects of the current schema

    2. Build and save SQL queries

    3. Transfer SQL scripts between schemas

    4. Create a lookup table based on a column in the current table

    5. Display APEX View reports

    Answer: A,D

    Explanation: The Object Browser page is divided into two sections:

    ->* Object Selection pane displays on the left side of the Object Browser page and lists database objects of a selected type within the current schema. You can further narrow the results by filtering on the object name.

    * Detail pane displays to the right of the page and displays detailed information about the selected object. To view object details, select an object in the Object Selection pane. Click the tabs at the top of the Detail pane to view additional details about the current object. To edit an object, click the appropriate button.

    D: When you view a table in Object Browser, the table description appears. While viewing this description, you can add a column, modify a column, rename a column, drop a column, rename the table, copy the table, drop the table, truncate the table, or create a lookup table based upon a column in the current table.

    Reference: Oracle Application Express, SQL Workshop and Utilities Guide Release 3.1.2, Browsing a Table

    Question No: 28

    Which three statements are true about a wizard-generated tabular form?

    1. Only allows you to update one record at a time.

    2. Allows you to add and update multiple records at a time.

    3. You can drill down to a detail record view.

    4. Allows you to add more than one record at a time.

    5. Only allows you to change the updateable columns.

    Answer: B,D,E

    Explanation: A tabular form enables users to update multiple rows in a table. The Tabular Form Wizard creates a form to perform update, insert, and delete operations on multiple rows in a database table.

    Reference: Oracle Application Express, Application Builder User’s Guide, Release 3.2, Creating a Tabular Form

    Question No: 29

    Marcie, Lauren, and Nancy are part of a project team to create an Inventory Application for ABC industries. The team members need to perform the following activities daily:

    • Marcie: Modify application, manage user groups, and view usage reports of her workspace

    • Nancy: Manage workspaces, and approve storage requests

    • Lauren: Modify database objects, view session state and view application reports. What privileges would you assign to these three users?

    1. Marcie: Developer, Nancy: Developer, Lauren: Workspace Administrator

    2. Marcie: Workspace Administrator, Nancy: Developer, Lauren: Developer

    3. Marcie: Application Express Administrator, Nancy: Workspace Administrator, Lauren: Developer

    4. Marcie: Workspace Administrator, Nancy: Application Express Administrator, Lauren: Developer

    5. Marcie: Workspace Administrator, Nancy: Workspace Administrator, Lauren: Developer

    Answer: C

    Explanation: Marcie needs to modify applications and manage users groups so she needs at least the Developer privileges and WorkSpace administrator (not A, not B, not D, not E).

    Nancy needs to handle workspaces and approve storage requests so she needs at least the WorkSpace Administrator privileges or Application Express Administrator (not A, not B).

    Lauren as a Developer would be fine.

    Note: When setting up Application Express users at a large organization, you assign roles and privileges to specific users. The roles within Application Express include the following:

    • Workspace administrators are users who perform administrator tasks specific to a workspace such as managing user accounts, monitoring workspace activity, and viewing log files. For this guide, you will be acting as the workspace administrator when setting up the development environment.

    • Developers are users who create and edit applications. Developers can have their own workspace or share a workspace.

    • End users have no development privileges. You define end users so that they can access applications that do not use an external authentication scheme.

    • Oracle Application Express administrators are superusers that manage an entire hosted instance using the Application Express Administration Services application.

    Question No: 30

    In your application both page 2 and page 4 branches to page 5. Page 5 has a Cancel button which currently redirects to page 2, however it should redirect to either page 2 or page 4 depending on the originating page. Which three actions need to be performed?

    1. Create two application items: LAST_PAGE and CURRENT_PAGE.

    2. Create an application computation on item LAST_PAGE, computation point Before Header, type

      PL/SQL Function Body and the computation body as: BEGIN

      :LAST_PAGE := nvl(:CURKENT_PAGE, :APP_PAGE_ID. ;

      :CURRENT_PAGE := ;APP_PAGE_ID; RETURN :LAST_PAGE;

      END;

    3. Create an application computation on Item LAST_PAGE, computation point After Submit, type PL/SQL Function Body and the computation body as:

      BEGIN

      :LAST_PAGE := :CURRENT_PAGE;

      :CURRENT_PAGE : = :APP_PAGE_ID; RETURN :LAST_PAGE;

      END;

    4. On page 5 create a validation to check whether the value stored in application item LAST_PAGE is equal to the value of APP_PREVJ_PAGE_ID where APPJgt;REV_PAGE_ID is Built-in Substitution String in Oracle APEX that stores the number of calling page.

    5. On page 5 use the value stored in application item LAST_PAGE to go back to the page from which you browsed to the current page.

    Answer: A,B,E

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