Computer Knowledge

GUI and Web Frameworks

1,915 Questions

Graphical user interface and web frameworks involve layout management, directives, and application design across platforms like Android and Angular. These concepts are tested in computer science and IT officer competitive exams. Review these questions to understand UI components and coding standards.

Android layout attributesAngular structural directivesVB.Net web methodsJava Swing componentsSiebel application framework

GUI and Web Frameworks Questions

Multiple choice

The Product Line data block is defined in the Order Management .fmb module. Product Line items are displayed in the default window at run time. In a second window called Buttons a set of icon buttons is displayed. At run time, the user must be able to freely navigate between the two windows. Which of the following statements identifies the types of windows to be defined?

  1. Both windows must be defined as dialog and modal.

  2. Both windows must be defined as document and modeless.

  3. Both windows must be defined as document and modal.

  4. The default window must be defined as modeless and the Buttonswindow must be modal.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

For free navigation between windows without restriction, both must be document and modeless. Document windows can contain multiple data blocks and modeless windows don't block interaction with other windows. Dialog windows are modal by definition, preventing free navigation. Modal windows require user response before allowing navigation elsewhere.

Multiple choice

All the buttons in a form should have the same values for several properties as the Exit button has. How can a property class be created and used to implement this?

  1. Click Create with the Property Classes node selected in the Object Navigator Open the Property Palette for the new property class Click Add Property Control-click the Exit button and in the Property Palette selected the properties to add Multiselect all the other buttons in the Object Navigator and open their Property Palette Click Property Class

  2. Open the Property Palette for the Exit button and multiselect the desired properties Click Property Class Multiselect all the other buttons in the Object Navigator and open their Property Palette Set the Subclass Information property to the name of the new property class

  3. Open the Property Palette for the Exit button and multiselect the desired properties Click Property Class Multiselect all other buttons in the Object Navigator and open their Property Palette Click Inherit

  4. Open the Property Palette for the Exit button and multiselect the desired properties Click Copy Properties Select the Property Class node in the Object Navigator and click Create Open the Property Palette for the new Property Class Click Paste Properties Multiselect all the other buttons in the Object Navigator and open their Property Palette Set the Subclass Information property to the name of the new property class
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The process involves creating a property class from the Exit button's properties, then applying it to other buttons via Subclass Information. Option A incorrectly adds properties FROM a button TO a class. Option C's 'Inherit' option doesn't exist - you must set Subclass Information. Option D's copy/paste approach is unnecessarily complex compared to the direct Property Class creation method.

Multiple choice

How can the users be enabled to add a single value to a list item?

  1. Set the List Style property to combo box. From the When-List-Activated trigger, call the Add_List_Element built-in.

  2. Set the List Style property to Tlist. From the When-List-Activated trigger, call the Populate_List built-in.

  3. Set the List Style property to poplist. From the When-List-Activated trigger, call the Add_List_Element built-in.

  4. Set the List Style property to combo box. From the When-List-Changed trigger, call the Add_List_Element built-in.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

To enable users to add values to a list item, you need a combo box style (which allows input) and the Add_List_Element built-in. The When-List-Activated trigger fires when the list is accessed, making it the right place to add new items. Option A correctly specifies both the combo box style and the appropriate trigger.

Multiple choice

Consider the following scenario: In a multiform application, the user started in FormA. From FormA, the user invoked FormB using CALL_FORM. From FormB, the user invoked FormC using OPEN_FORM. From FormC, the user invoked FormD using OPEN_FORM. From FormB, the user invoked FormE using CALL_FORM. There is an additional form in the application, called FormF. Which statement is true?

  1. FormF can be invoked from FormC using CALL_FORM.

  2. FormF can be invoked from FormA using OPEN_FORM.

  3. FormF can be invoked from FormD using CALL_FORM.

  4. FormF can be invoked from FormE using CALL_FORM.

  5. FormF can be invoked from FormB using OPEN_FORM.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

CALL_FORM creates a modal relationship - the called form must be closed before returning to the caller. OPEN_FORM is modeless. The chain shows FormB called FormE with CALL_FORM, so FormE is currently modal over FormB. FormF can be invoked from FormE using CALL_FORM because FormE is active and can initiate modal calls. Other options are incorrect because CALL_FORM from Forms A, C, or D would block their respective parents.

Multiple choice

An OC4J instance was started on a development PC and then a form was run from the Forms Builder. Which of the following statements describes the behavior of OC4J?

  1. It appears in the Forms Builder window that can be minimized once OC4J starts.

  2. It appears in a separate window that can be closed once OC4J starts.

  3. It appears in the Forms Builder window that can be closed once OC4J starts.

  4. It appears in a separate window that should not be closed as the OC4J instance will abort.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

OC4J (Oracle Containers for J2EE) starts in a separate window when running forms from Forms Builder. This window must remain open - closing it terminates the OC4J instance, which would interrupt form execution. The window cannot be closed without affecting the running instance.

Multiple choice

MARY is writing a Forms application, and plans to include a Hierarchical Tree Item. What should she do to facilitate this functionality?

  1. Write Java wrapper classes to integrate the Hierarchical Tree item into Forms.

  2. Add a special layer of Java code to register the properties and methods of the Hierarchical Tree Item.

  3. Use the FTree PL/SQL Package and its built-ins to register and invoke the Hierarchical Tree Item.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Oracle Forms provides the FTree PL/SQL package specifically for working with Hierarchical Tree items. This package includes built-ins like ADD_TREE_DATA, DELETE_TREE_NODE, and SET_TREE_PROPERTY to register, populate, and manipulate hierarchical trees. Options A and B incorrectly suggest writing Java code - Forms has native PL/SQL support for tree items without requiring Java wrappers or additional layers.

Multiple choice

Consider the following scenario: In a multiform application, the user started in FormA.

From FormA, the user invoked FormB using CALL_FORM.

From FormB, the user invoked FormC using OPEN_FORM.

From FormC, the user invoked FormD using OPEN_FORM.

From FormB, the user invoked FormE using CALL_FORM.

There is an additional form in the application, called FormF. Which of the following statements is true?

  1. FormF can be invoked from FormC using CALL_FORM.

  2. FormF can be invoked from FormA using OPEN_FORM.

  3. FormF can be invoked from FormD using CALL_FORM.

  4. FormF can be invoked from FormE using CALL_FORM.

  5. FormF can be invoked from FormB using OPEN_FORM.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

FormF can be invoked from FormE using CALL_FORM.

Multiple choice

The user must be able to invoke a list of values for valid sales representative in the Orders form. To facilitate this, a button was created and positioned next to the Sales Rep ID field The text item has these properties set:

  • Required: Yes

    - List of Values: SALES_REP_LOV

    - Validate from List: No

    The button has these properties set:

    - Keyboard Navigable: Yes

    -Mouse Navigate :Yes

    - Iconic :Yes

    - Icon Filename :list .ico

An appropriate LOV (called SALES_REP_LOV) was created and associated with the text item. An icon file (list.gif) exists in the appropriate directory. All other properties are left at their defaults. A When-Button-Pressed trigger was written at the item level with this code:

LIST_VALUES;

To test the form, it was attempted to enter a new record. What is the run-time behavior of the form?

  1. The form doesn't compile and therefore cannot be tested.

  2. The icon is not displayed on the button. When the Sales Rep Id field is clicked and then the button is clicked, the LOV is invoked.

  3. The icon is displayed on the button. When the Sales Rep Id field is clicked and then the button is clicked, the LOV is not invoked and an error is reported.

  4. The icon is not displayed on the button. When the Sales Rep Id field is clicked and then the button is clicked, the LOV is not invoked and an error is reported.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The icon filename property contains 'list .ico' with a space before the extension, but the actual file is 'list.gif' - this mismatch prevents icon display. The LIST_VALUES built-in requires the LOV to be associated with the currently focused item, but the button click shifts focus away from the text item, causing an error. This is a common Oracle Forms pitfall - the code would work if called via KEY-LISTVAL trigger or if LOV was properly validated.

Multiple choice

An Application needs a Department Module to be created. A Developer creates a Database data block using the Data Block Wizard, after creating the block based on the Departments table, while creating the Layout wizard, various items were placed on the canvas. The user wants to change the Employee_id Text Item to Display Item. How would it be possible?

  1. It is not possible to change the item type once its been created.

  2. The item type can be changed while placing the item on the canvas using layout wizard.

  3. Create a new Display Item and name it as Employee_id.

  4. None of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Multiple choice

The Child_Birth .fmb module has one content canvas, which displays information about the Number of Births Taken place during the year 2004-2005. TOM wants to increase the canvas display area by creating an overlay canvas to enable images of selected the child to be displayed on request. How can he size the display area of the overlay canvas?

  1. Define the display area for a stacked canvas by using the built-in procedure Set_Canvas_Property.

  2. Define the display area for a stacked canvas by using the built-in procedure Set_Window_Property

  3. Define the display area for a content canvas by using the built-in procedure Set_Canvas_Property.

  4. Define the display area for a content canvas by using the built-in procedure Set_View_Property.

  5. Define the display area for a stacked canvas by using the built-in procedure Set_View_Property.
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

A stacked canvas (overlay canvas) requires defining its display area using Set_View_Property, which sets the viewport size and position. This determines where and how large the overlay appears on the content canvas beneath it. Set_Canvas_Property affects canvas properties, not the viewport display area.

Multiple choice

In the Online E-learning .fmb module, data block items are displayed on two content canvases. A set of icon buttons is defined that users must have access to at all times. Which canvases type is appropriate to display the buttons?

  1. Overlay stacked canvas

  2. Overlay Tab canvas that is associated with a separate window

  3. Content canvas that is associated with the same window as the two content canvases

  4. Horizontal Toolbar canvas that is associated with a separate window

  5. Horizontal Toolbar canvas that is associated with the same window as the two content canvases
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

For icon buttons that must always be accessible while users work with content canvases, a Horizontal Toolbar canvas associated with the same window is the appropriate choice. Toolbar canvases are specifically designed to display buttons or iconic items that remain visible and accessible regardless of navigation within content canvases. Options A and B are incorrect because overlay canvases are for conditional display, not persistent access. Option C is incorrect because a second content canvas doesn't provide button persistence. Option D is incorrect because a separate window would hide buttons when the main window is active.

Multiple choice

Which of the following helps in programmatically determining the button a user pressed to respond to an alert?

  1. Use the GET_ALERT_PROPERTY function.

  2. Use the GET_ALERT_BUTTON_PROPERTY function.

  3. Check the value returned by the SHOW_ALERT function to see if it is 1, 2, or 3.

  4. Check the value returned by the SHOW_ALERT function to see if it is ALERT_BUTTON1, ALERT_BUTTON2, or ALERT_BUTTON3.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Check the value returned by the SHOW_ALERT function to see if it is ALERT_BUTTON1, ALERT_BUTTON2, or ALERT_BUTTON3.

Multiple choice

A calculated item has to be created in the Control block of the Resource Management form. This item should contain the total of employee salaries for employees in a particular department. Which of the following statements is true about how to create the calculated item?

  1. It can be created by first creating a text item and then changing the item type.

  2. It can be created in the Layout Editor using a special tool that creates a calculated item.

  3. It can be created by first creating a display item and then setting appropriate properties in its Calculation property group.

  4. It can be created in the Layout Editor by selecting the Salary item of the Employees block, selecting the Control block from the block list, clicking the Text Item tool, and drawing a text item on the canvas to automatically calculate a sum of the selected Salary item.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

In Oracle Forms, calculated items are created as display items first, then their Calculation properties are configured to define the formula (like SUM over a block). Text items can't become calculated items. The Layout Editor text item tool doesn't auto-create calculations - you must set properties manually.