Understanding Data Representation Quiz

What is the smallest unit of data in a computer?

• Byte

• Bit

• Kilobyte

• Megabyte

How many bits are there in a byte?

• 4

• 8

• 16

• 32

Convert the binary number 1010 to decimal.

• 5

• 10

• 12

• 15

What is the hexadecimal representation of the decimal number 255?

• FF

• 1F

• 2F

• F0

Which of the following is a character encoding standard?

• ASCII

• JPEG

• MP3

• PNG

How many colours can be represented with 8 bits per pixel?

• 16

• 64

• 256

• 512

What is the term for reducing the file size of an image by removing some data?

• Lossless compression

• Lossy compression

• Data encryption

• Data redundancy

Which of the following is a lossless compression format?

• JPEG

• MP3

• PNG

• GIF

What is the sample rate of a CD-quality audio file?

• 22.05 kHz

• 44.1 kHz

• 48 kHz

• 96 kHz

If a sound file has a sample rate of 44.1 kHz and a bit depth of 16 bits, what is the bit rate for one channel?

• 705.6 kbps

• 1411.2 kbps

• 2822.4 kbps

• 5644.8 kbps