1 Multimedia Applications

Multiple Choice Questions

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Short Questions

1. Advertisements are shown on plasma TV screens on platforms. (1) Announcements are made using

the broadcasting system at MTR stations. (1)

Information on MTR is provided by kiosks and ticket selling machines. (1) Instant information is

provided by LED display boards in MTR trains. (1)

2. (a) • Use multimedia presentation software such as PowerPoint to present a lesson in classroom.

• Display school notices to students using LED display panels.

• Broadcast live school activities to classrooms via a local area network.

• Store multimedia teaching materials in the school learning management system for

students to download.

• Use projectors to show videos of school activities to students in the school hall.

• Use video conferencing between classrooms for meetings. (any four × 1)

(b) • Multimedia lessons can draw students’ attention more effectively.

• Multimedia simulations can help students understand the abstract and complicated

concepts.

• Multimedia technologies help students develop self-learning habits. (any two × 1)

3. (a) Advantages:

• Multimedia elements can be incorporated in the e-book to enrich the user’s viewing

experience.

• The cost of distributing e-books is lower.

• Full text search is supported in e-books.

• E-books are more environmental friendly than printed books. (any three × 1)

Disadvantages:

• Printed books can be read anywhere without the use of any hardware or software. (1)

• There is an initial cost for setting up hardware and software of the e-book production

system. (1)

(b) • A flatboard scanner is needed for scanning pictures, photographs, written essays, poems

etc. (1)

• A digital camera is needed for capturing digital photos of students and the campus. (1)

• A digital video camera is needed for recording class activities in digital format. (1)

• A CD burner is needed for storing the e-book on CDs. (1)

4. (a) .wav / .mp3 / .midi (any two × 1)

(b) .txt / .doc / .rtf (any two × 1)

5. (a) • Multimedia elements can be incorporated in the e-book to enrich the user’s viewing

experience. (1)

• Full text search is supported in e-books. (1)

(b) Hardware: PDA (1) Software: Adobe Reader (1)

2 Text

Multiple Choice Questions

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Short Questions

1. • Different fonts or typefaces • Different font sizes • Text colour

• Underlined text • Paragraph justification • Paragraph indentation

• Bullets or an unordered list (any four × 1)

2. (a) • Versatile text and document formatting features such as font, font size and colours can be

applied to a document.

• Multimedia elements such as images and audios can be included.

• Advanced functions such as mail merge, spelling check and thesaurus are usually

provided.

• Application objects such as spreadsheets or presentation slides can be included.

(any three × 1)

(b) • All text and paragraph formatting features (1)

• Images or pictures (1)

• Application objects such as spreadsheets or presentation slides (1)

3. (a) Users can access different types of information on the web page without the need to scroll up

and down. (1)

(b) A：The largest font size is chosen for the news headlines to draw users’ attention. (1)

B：A middle-sized font is used to summarize the news content in a few lines. (1)

C：The smallest font size is used for the additional information related to the news. (1)

(c) (i) Serif fonts include the small features or decorations at the end of strokes of each letter

while sans serif fonts do not. (1)

(ii) A sans serif font makes small-sized letters more readable than a serif font does. (1)

4. D → A → E → C → B → F (6)

Long Questions

1. (a) (i) Students may be unable to open the document if they do not have Microsoft Word installed

in their computers. (2)

(ii) Protect the word processing documents using a password so that students can only read but

cannot modify the documents. (2)

(b) Yes. Plain text files can be opened by any text editor. / No. Text and paragraph formatting

features and images cannot be preserved in plain text files. (any one × 2)

(c) (i) • PDF documents can be readily opened using Adobe Reader which can be downloaded

from the Web for free.

• By configuring the security settings of the parent letter in PDF format, students

cannot modify the letter easily.

• PDF is a cross-platform document format.

• A PDF file can be digitally signed so that students can verify that the parent letters are

sent from the school. (any two × 2)

(ii) Adobe Reader (1)

(iii) • Use Adobe Reader or other PDF generating software such as PDF995 and

FlashPaper.

• Make use of the PDF online generating service on the Adobe’s web site.

• Use OpenOffice.org 3.0 Writer. (any two × 2)

2. (a) PDF (1) and Flash documents (1)

(b) No. (1) FlashPaper 2 is file format conversion software which is not a complete substitute for a

word processor. (1)

(c) A Flash document can be opened more easily and quickly than a PDF file in a browser, (1) as

the Flash player plug-in is embedded in the browser. (1)

(d) Open source software is computer software in which the source code is publicly available to

users to study, modify and redistribute. (1) The software itself is also free to download. (1)

(e) Use OpenOffice.org 3.0 Writer to open the Microsoft Word document sent by Andy. (1)

Complete the rest of the report using the Writer. (1) Export the document in the Writer as a

Microsoft Word file. (1) Send the final Word document to Andy via e-mail. (1)

(f) Mary has not exported the report file in Microsoft Word document format. (1)

(g) No. (1) Andy will be unable to edit the report using Microsoft Word. (1)

3 Graphics

Multiple Choice Questions

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Short Questions

1. (a) C > A > B (3) (b) D < E < F (3) (c) H < I < G (3) (d) J < K < L (3)

2. (a) (i) GIF / PNG / TIFF (any one × 1)

(ii) Advantage: There is no loss of image quality after compression. (1)

Disadvantage: Large storage space is required to store images. (1)

(b) Web photos / Photo CD (1) Reason: Less time is needed for downloading. (1)

3.

4. (a) 256-colour corresponds to 8-bit colour depth (1)

Uncompressed file size = 640 × 480 × 8 bits (1)

= 2,457,600 bits

= 2.34 MB (1)

(b) Uncompressed file size = 1,600 × 1,200 × 24 bits (1)

= 46,080,000 bits

= 43.95 MB (1)

5. (a) Dots per inch (1)

(b) Width = 3.5 × 300 pixels = 1,050 pixels (1)

Height = 5 × 300 pixels = 1,500 pixels (1)

(c) Uncompressed file size = 1,050 × 1,500 × 24 bits (1)

= 37,8000,000 bits

= 4.51 MB (1)

(d) (i) Width = 3.5 × 1,200 pixels = 4,200 pixels (1)

Height = 5 × 1,200 pixels = 6,000 pixels (1)

(ii) Width =

Height =

6 ,000300

inches=20 inches (1 )

6. (a) Image A: Rotate by 180° / flip vertically (any one × 1)

Image B: Enlarged (1)

Image C: Flip horizontally (1)

(b) Top layer: Image A (1)

Middle layer: Image C (1)

Background layer: Image B (1)

7. (a) 8 megapixels (3,284 × 2,448 = 7,990,272 pixels 8 megapixels) (1)

(b) Advantage: ‘High’ resolution photo gives more details than ‘Low’ resolution photo. (1)

Disadvantage: ‘High’ resolution photo requires more storage space than ‘Low’ resolution photo. (1)

(c) (i) The aspect ratios of ‘High’ and ‘Special’ are different.

Aspect ratio of ‘High’ resolution =

Aspect ratio of ‘Special’ resolution = (ii) Taking widescreen photo for landscape scenery (1) (or any reasonable answer)

(d)

Photo quality Compression ratio File size

Normal High Small

Fine Medium Medium

Super Fine Low Large

(e) Brightness / contrast / alpha control (any one × 1)

(1)

(1)

Long Questions

1. (a) Folder B. (1) The file size of each photo in folder B is smaller due to its lower colour depth and

resolution. (1) It is less likely to exceed the size limit of the attachment. (1)

(b) (i) Folder A. (1) The photos in folder A are of higher quality when resized. (2)

(ii) Reason: The aspect ratio of the screen and that of the photos are different. (2)

Solution: Crop or trim the photos to match the aspect ratio of the screen. (1) Fill the whole

screen by tiling the photos. (1)

(c) Estimated size of the uncompressed BMP file

= 1,840 × 1,230 pixels × 24 bits/pixel (1)

= 54,316,800 bits

= 6,789,600 bytes

6,630.5 KB (1)

(d) The amount of details to be shown on the photo depends on the compression ratio of a JPEG

photo. (1) The higher the compression ratio, the fewer the details can be shown and the smaller

is the file size. (2)

2. (a) (i) JPG / JPEG. (1) It supports high compression ratio with reasonable image quality. / It

supports 24-bit colour depth. (any one × 2) OR

BMP / TIFF. (1) All image details are retained without loss of quality. (2)

(ii) Reduce the colour depth of the photos. (1)

Reduce the resolution / dimensions / size of the photos. (any one × 1)

(b) Image rotation: When the object taken by the camera is not erect / the photo is taken in portrait

mode, (1) this function enables the user to obtain an erect image of the object / to obtain a photo

in landscape mode. (1) Brightness and contrast control: When the photo taken is too bright or

too dark, (1) this function allows the user to obtain reasonable brightness. (1)

(c) (i) The resolution of the online photos is lower to reduce the downloading time.

(ii) The low-resolution image is a bitmap image. (2)

(d) it is because the computer screen uses RGB to reproduce colours (1) while the inkjet printer

uses CMYK. (1)

3. (a) (i) Version A: Bitmap graphics / raster graphics (any one × 1)

Version B: Vector graphics (1)

(ii) Version B. (1) The logo can be magnified without loss of image quality. (1)

(b) Vector graphics are composed of lines, arcs and fills stored in the form of mathematical

formulas. (2) Bitmapped graphics store images in the form of a rectangular grid of pixels. (2)

(c) (i) Fig. b: Vector graphics (1)

Fig. c: Bitmap graphics / raster graphics (any one × 1)

(ii) Image in Fig. c (1)

(iii) Designing a poster or a banner for school activities such as anniversary. (2)

(d)

Font Type

Bitmapped font (1)

Truetype font / vector font / outline font (any one × 1)