GCSE Year 10 Representation Recap

What is result of the boolean expression (A OR B) AND C where A = 1, B=0, C=1?

• 1

• 0

• Invalid expression

Calculate the file size in bytes of this text file assuming ASCII (8 bit) encoding. "The year 10 CompSci class got this right."

• 41

• 328

• 34

• 272

What is the number base of the hexadecimal number system?

• 16
• 10
• 2
• 8

What is A3 base 16 in base 2?

• 10100010
• 10100001
• 10100111
• 10100011

In binary using up to 8 bits, what is 1111 x 1000?

• 11110000

• 1111000
• 111100
• 111000

What is a two right binary shift equivalent to?

• Subtracting 2 from the number
• Dividing the number by 4
• Adding 2 to the number
• Multiplying the number by 4

Decimal 218 in base 2 is...

• 10110101
• 10011011
• 11011010
• 11100110