Binary and Data Representation Quiz

How many bits are in a nibble?

• 2

• 4

• 8

• 16

Answer explanation

A nibble consists of 4 bits. It is half of a byte, which contains 8 bits. Therefore, the correct answer is 4.

Which term represents 1,024 bytes?

• Kilobyte

• Kibibyte

• Megabyte

• Mebibyte

Answer explanation

A Kibibyte (KiB) is defined as 1,024 bytes, while a Kilobyte (KB) is often used to refer to 1,000 bytes. Therefore, the correct term for 1,024 bytes is Kibibyte.

What is the primary advantage of using hexadecimal over binary in data representation?

• Hexadecimal uses fewer digits

• Hexadecimal is faster to compute

• Hexadecimal allows for more accurate calculations

• Hexadecimal represents negative numbers better

Answer explanation

The primary advantage of using hexadecimal over binary is that hexadecimal uses fewer digits to represent the same value. This makes it more compact and easier to read, especially for large binary numbers.

What is the maximum number that can be stored in 8 bits?

Answer explanation

In 8 bits, the maximum value is calculated as 2^8 - 1, which equals 255. This is because 8 bits can represent values from 0 to 255, making 255 the highest number that can be stored.

What is the sample rate measured in?

• Bits

• Bytes

• Hertz (Hz)

• Kilobytes

Answer explanation

The sample rate refers to the number of samples taken per second in audio processing, which is measured in Hertz (Hz). This indicates how many times per second the audio signal is sampled.

What happens when binary shifts left by one place?

• Divides the number by 2

• Multiplies the number by 2

• Divides the number by 4

• Adds 1 to the number

Answer explanation

Shifting a binary number left by one place effectively multiplies the number by 2. Each left shift increases the value by a factor of 2, making 'Multiplies the number by 2' the correct choice.

How many characters can be represented using 7-bit ASCII?

• 64

• 128

• 256

• 512

Answer explanation

7-bit ASCII uses 7 bits to represent characters, allowing for 2^7 combinations. This results in 128 unique characters, including control characters and printable symbols. Therefore, the correct answer is 128.

Which of the following sound file formats uses lossy compression?

• WAV

• FLAC

• MP3

• AIFF

Answer explanation

MP3 is a sound file format that uses lossy compression, which reduces file size by removing some audio data. In contrast, WAV, FLAC, and AIFF are either uncompressed or use lossless compression, preserving all audio quality.

What is the result of adding 1010 + 1011 in binary?

• 11010

• 10100

• 10001

• 11000

Answer explanation

To add 1010 (2 in decimal) and 1011 (3 in decimal) in binary, align the numbers and add from right to left: 0+1=1, 1+1=10 (write 0, carry 1), 0+0+1=1, 1+1=10 (write 0, carry 1), and finally carry 1. This gives 11010 (10 in decimal).

Which of the following units is larger?

• Mebibyte (MiB)

• Megabyte (MB)

• Kilobyte (KB)

• Kibibyte (KiB)

Answer explanation

A Mebibyte (MiB) is larger than a Megabyte (MB), Kilobyte (KB), and Kibibyte (KiB). Specifically, 1 MiB equals 1,048,576 bytes, while 1 MB equals 1,000,000 bytes, making MiB the largest unit among the options.