Data Representation Quiz

How many bits are there in a byte?

• 6

• 7

• 8

• 9

How many bytes are there in a kilobyte?

• 512

• 1000

• 1024

• 2048

How many bytes are there in a megabyte?

• 1000 x 1000

• 1000 x 1024

• 1024 x 1000

• 1024 x 1024

Why do computers use binary?

• Because it is easier to read

• Because it is faster to process

• Because computers use circuits which can be on or off, represented by 1 and 0

• Because it is more secure

Calculate the denary value of the 8-bit number 01101001.

• 101

• 105

• 110

• 115

Convert the denary number 78 to binary.

What problem occurs if a binary number greater than 255 is stored in one byte?

• Underflow error

• Overflow error

• Bit loss error

• Memory leak

What is the result of performing a binary shift left of two places on the number 01100111?

• 11001110

• 11001100

• 10011100

• 10011000

What is the effect on the value of a binary number after a shift left of one place?

• The number is divided by 2

• The number is multiplied by 2

• The number is divided by 4

• The number is multiplied by 4

What is the effect on the value of a binary number after a shift left of two places?

• The number is divided by 2

• The number is multiplied by 2

• The number is divided by 4

• The number is multiplied by 4