2015-2016 S.4 ICT First Test solution
Section A - MC
Section B – Short Questions
Q1 digitization is conversion of analog signals to digital signals. Digitized multimedia elements can
be stored, copied and further edited.
Q2 Product demonstration with notebook, projector & presentation software.
Q3 Students are more interested in learning with multimedia elements.
Difficult concepts or dangerous experiments can be shown to students.
Q4 CODEC is compressor-decompressor. File of multimedia elements cannot be decompressed and
played.
Q5 the larger the line spacing, the higher the readability but the amount of text displayed is reduced.
Q6 ‧Insert objects
‧Spelling and grammar checker
‧Word count
‧Mail merge
‧Auto page count
(any four × 1)
Q7 It can be opened by most word processors. File size of txt format is smaller because of less
formatting features.
Q8 form filling, multiple images, merge documents
Q9 w=150/150=1 inch
h=225/150=1.5 inch
Q10 sharpen, pixelize, explosion, negative, emboss, edge detection
Q11 ratio=1920/1080=1.78:1
Aspect ratio decreases from 1.78 to 1.25. The resized image is stretched vertically.
Section C – Long Questions
Q1
a) =1024*768*24/8/1024/1024=2.25MB
b) =64*1024/2.25=29127
c) Reduce resolution, reduce colour depth & increase compression ratio
d) I)choose a high scanning resolution
e)
f)
g)
h)
i)
ii)use a smaller scanning resolution or specify the final pixel size
Use 8-bit grayscale
The compression used by the DC is determined by the complexity of the photos
Tracing technique
Banner design
Easy to edit component objects
Q2
(a) Optical character recognition (2)
(b) •The resolution of the scanned image (1)
•The quality of the printout (1)
(c) •DOC format is platform dependent. (2)
•formats of DOC documents may not be preserved in different versions of word processors. (2)
(d) It is because PDF is platform independent and
the fonts and text layout of a PDF file can be preserved. (2)
(e) password security
(f) printing, changing the document, content copying
(g) click menu file & then properties. Click tab security & choose security method to password
security.
Q3
(a) w/h=4/3 w=4h/3 wh=20000000 4h*h/3=20000000 h=3873 w=5164
(b) JPEG supports high compression ratio, more photos can be stored in the medium.
JPEG supports variety of quality which suits for different purposes.
JPEG supports 24 color depth (true color), colorful photos can be taken.
(c) (i)
color depth of GIF (8 bits) is smaller than that of JPEG (24 bits).
(ii) The resolution of photo003.GIF is larger than that of photo002.GIF, moreover, the default
background color of the graphical software will appear in the corner of the photo.
(NOT ACCEPT : the photo rotates/ the filename is difference/quality)
(ACCEPT: file size, dimension)
(iii) PNG/TIFF
(d) Professional graphical software supports layers.
Different filters can be applied to a photo such as red eyes removal, blur, etc..
More photo correction functions are provided such as contrast, brightness.