AHJN: U1-P1-Data Representation

What are the column weightings for the binary number system in an 8-bit representation?

• 1, 2, 4, 8, 16, 32, 64, 128

• 1, 10, 100, 1000, 10000, 100000, 1000000, 10000000

• 1, 2, 3, 4, 5, 6, 7, 8

• 16, 256, 4096, 65536, 1048576, 16777216, 268435456, 4294967296

What is the purpose of learning about binary magnitudes in computer science?

• To understand how computers store text

• To represent and manipulate large numbers using binary prefixes

• To compress multimedia files

• To encrypt data transmissions

How is the one’s complement of a binary number obtained?

• By inverting all the bits

• By adding 1 to the binary number

• By reversing the order of the bits

• By subtracting the number from 255

What does the two’s complement of a binary number represent?

• The number with all bits inverted

• The one’s complement plus 1

• The number shifted right by one bit

• The number with the sign bit flipped

In sign and magnitude representation, what does the left-most bit indicate?

• The magnitude of the number

• The sign of the number

• The exponent of the number

• The parity of the number

What does BCD stand for?

• Binary Coded Denary

• Binary Coded Decimal

• Base Coded Denary

• Base Coded Decimal

What is the primary function of ASCII code?

• To represent all languages of the world

• To encode characters and control codes for computers

• To compress text files

• To encrypt data

What is the main advantage of Unicode over ASCII?

• It uses fewer bits per character

• It can represent characters from all languages

• It is faster to process

• It is only used for English characters

Why do computers use the binary number system?

• It is easier for humans to understand

• It matches the ON/OFF states of electronic switches

• It allows for more complex data types

• It reduces memory usage

What is the denary value of the binary number 1101?

• 11

• 12

• 13

• 14