Data Representation in Computer Science Quiz

What is the binary representation of the decimal number 13?

• 1101

• 1011

• 1110

• 1001

Which of the following hexadecimal numbers is equivalent to the binary number 1010 1101?

• 1A

• AD

• BD

• 9E

In the context of bitmap images, what does each pixel represent?

• A single colour

• A binary value

• A hexadecimal character

• An ASCII character

Tags

NGSS.HS-PS4-2

What is the hexadecimal representation of the decimal number 255?

• FF

• EF

• BF

• CF

How many bits are typically used to represent a character in Unicode UTF-8 encoding?

• 8 to 32 bits

• 16 bits

• 32 bits

• 8 bits

What is the binary representation of the hexadecimal number F?

• 1111

• 1010

• 1100

• 1001

Which of the following is NOT a valid ASCII character?

• A

• 9

• $

• 🖤

In a bitmap image, if a pixel is represented by 24 bits, how many colours can it display?

• 16 million

• 256

• 65,536

• 1 million

What is the main difference between ASCII and Unicode?

• Unicode uses more bits to represent each character, allowing for a wider range of characters.

• ASCII can represent characters from all languages, while Unicode is limited to English.

• Unicode is only used for symbols, while ASCII is used for letters.

• There is no difference; they are interchangeable.

What is metadata?

• Big data

• A collection of pixels

• Data about data

• ASCII