GCSE Computer Science

Question 1

What is the binary representation of the decimal number 13?

Accepted Answer

1101

Answer

13 in binary is 1101 because 8 + 4 + 0 + 1 = 13.

Question 2

Which of the following is an example of volatile memory?

Accepted Answer

RAM

Answer

RAM is volatile because it loses its contents when the power is turned off.

Question 3

What does ALU stand for in the context of a CPU?

Accepted Answer

Arithmetic Logic Unit

Answer

ALU stands for Arithmetic Logic Unit, the component that performs mathematical and logical operations.

Question 4

How many bits are in one byte?

Accepted Answer

8

Answer

One byte consists of exactly 8 bits, which is the standard unit of digital information.

Question 5

What is the hexadecimal equivalent of the decimal number 255?

Accepted Answer

FF

Answer

FF in hexadecimal equals (15 × 16) + 15 = 240 + 15 = 255.

GCSE - General Certificate of Secondary Education Practice Test