AICE CS Review Paper 1

What is the base number of digits that a binary system uses to represent numbers?

• 10

• 2

• 16

• 8

What is the maximum positive number that can be represented in an 8-bit binary system?

• 128

• 255

• 256

• 512

Which character encoding standard provides the greatest range of characters, using 2 or 4 bytes per character?

• ASCII

• Extended ASCII

• Unicode

• Binary Coded Decimal

What does the hexadecimal number '1E' equal in denary (decimal)?

• 30

• 28

• 16

• 20

What is the purpose of using Two's Complement in binary numbers?

• To add binary numbers

• To subtract binary numbers

• To represent negative numbers

• To convert binary to hexadecimal

What does pixel density measure in computer graphics?

• The number of pixels per square inch

• The number of pixels per centimeter

• The brightness of the image

• The color depth of the image

What is the result of increasing the sampling rate in sound digitization?

• Decreases the accuracy of the digitized sound wave

• Increases the file size

• Reduces the file size

• Makes the sound wave continuous

Which type of compression allows the original data to be perfectly reconstructed from the compressed file?

• Lossy compression

• Lossless compression

• Vector compression

• Bitmap compression

What is the primary advantage of using lossless compression over uncompressed files?

• Increases the quality of the file

• Reduces the time needed to search for data

• Enhances the color depth of images

• Decreases the sampling rate of sounds

How is a bitmap image's first row represented in Run-length Encoding (RLE)?

• As a sequence of pixel colors

• As a sequence of alternating black and white pixels

• As a sequence of pixel counts and values

• As a sequence of pixel brightness levels