H CS - Fire Salamanders Targeted

Convert the denary number 19 to an 8-bit binary value.

• 00010011

• 00010110

• 00011000

• 00010001

What is the denary value of the binary number 01010110?

• 86

• 56

• 66

• 96

Which of these binary numbers is equal to 32?

• 00011110

• 00100000

• 00111100

• 00101000

What is the range of positive values for an 8-bit unsigned binary number?

• 0 to 127

• 0 to 255

• 1 to 255

• 0 to 128

Which binary number represents the denary value 7?

• 00000111

• 00001010

• 00001110

• 00000011

What is the 2’s complement representation of -5 in 8 bits?

• 11111011

• 11111010

• 00000101

• 11111101

Which of the following is the correct method to calculate a 2’s complement value?

• Flip the bits only

• Flip the bits then add 1

• Add 1 then flip bits

• Just subtract from 255

Convert the 2’s complement binary 11111100 to denary (8-bit).

• -3

• -4

• 252

• -5

What’s the largest positive number that can be stored using 4 bits in 2’s complement?

• 8

• 7

• 15

• 16

Which of the following best describes a mantissa in floating point?

• Controls the number’s size

• Controls the number’s sign

• Controls the number’s precision

• Controls the exponent