Understanding Graphics Primitives and Devices

What is a Cathode Ray Tube (CRT)?

• A Cathode Ray Tube (CRT) is a device that uses liquid crystals to display images.

• A Cathode Ray Tube (CRT) is a vacuum tube that displays images by directing electron beams onto a phosphorescent screen.

• A Cathode Ray Tube (CRT) is a solid-state device that emits light when powered.

• A Cathode Ray Tube (CRT) is a type of LED display.

Describe the main function of a raster scan display.

• To store images in a compressed format.

• The main function of a raster scan display is to sequentially illuminate pixels to create images on the screen.

• To display images using vector graphics.

• To enhance audio quality during playback.

What are the advantages of plasma displays over LCDs?

• Higher energy consumption than LCDs

• Advantages of plasma displays over LCDs include better color accuracy, deeper blacks, wider viewing angles, faster response times, and larger screen sizes.

• Limited screen size options

• Worse color accuracy than LCDs

List two types of input devices used in graphics applications.

• Graphic tablet, Mouse

• Scanner

• Printer

• Keyboard

How does a trackball differ from a traditional mouse?

• A trackball has no moving parts, while a traditional mouse has a scroll wheel.

• A trackball requires a flat surface to operate, unlike a traditional mouse.

• A trackball is stationary and uses a ball for cursor control, while a traditional mouse is handheld and moves across a surface.

• A trackball is used for gaming while a traditional mouse is not.

Explain the concept of positioning techniques in graphics.

• Positioning techniques are only used for text alignment.

• Positioning techniques in graphics are methods for arranging visual elements, including absolute, relative, fixed, and sticky positioning.

• Positioning techniques refer to color selection in graphics.

• Positioning techniques are methods for creating 3D effects.

What are rubber-band techniques used for in graphical interfaces?

• For resizing images without distortion.

• Rubber-band techniques are used for visual feedback during dragging or selection in graphical interfaces.

• To apply filters to images in real-time.

• To create permanent selections in graphical interfaces.

Define the term 'multiple selections' in the context of input techniques.

• Multiple selections are input techniques that enable users to select multiple options from a list.

• Multiple selections allow users to select only one option from a list.

• Multiple selections are input techniques that require users to input text manually.

• Multiple selections refer to the ability to deselect options after making a selection.

What is the purpose of scales and guidelines in graphic design?

• To limit creativity and artistic expression.

• To create random designs without any structure.

• The purpose of scales and guidelines in graphic design is to ensure consistency, balance, and proportion in visual elements.

• To confuse the viewer with inconsistent elements.

How do graphical potentiometers enhance user interaction?

• Graphical potentiometers enhance user interaction by providing intuitive visual controls that allow for easy adjustments and immediate feedback.

• They complicate user interaction by adding unnecessary steps.

• They are used exclusively in digital devices without visual elements.

• They only provide audio feedback for adjustments.