Computer Science Quiz

What does ASCII stand for?

• American Standard Code for International Information

• American Standard Code for Information Interchange

• Advanced System Code for Internet Interchange

• All System Code Information

What is the key difference between ASCII and Unicode?

• ASCII supports emojis, Unicode doesn’t

• Unicode uses fewer bits

• Unicode can represent more characters than ASCII

• ASCII supports all languages

What is the binary equivalent of the decimal number 43 (8-bit)?

• 00101011

• 00110010

• 00101101

• 00100011

What is the decimal value of the binary number 11111111?

• 128

• 254

• 255

• 256

What is the binary equivalent of the hexadecimal number 2A (8-bit)?

• 00010101

• 00101010

• 00110011

• 01010101

What is the hexadecimal equivalent of the binary number 11110000?

• F0

• 0F

• FF

• 10

What is the hexadecimal value of decimal 200?

• A0

• C8

• FA

• D2

What number system uses only 0s and 1s?

• Decimal

• Hexadecimal

• Binary

• Octal

Why do computers use binary?

• Because it is faster than decimal

• Because it represents on and off states

• Because it uses more memory

• Because it has more digits

Which method uses one bit per character to detect errors in data transmission?

• Echo check

• Block check

• Parity check

• Checksum