GCSE GCSE Computer Science

Question 1

What is the decimal value of the binary number 1010?

Accepted Answer

10

Answer

1010 in binary equals 1×8 + 0×4 + 1×2 + 0×1 = 10 in decimal.

Question 2

How many bits are in one byte?

Accepted Answer

8

Answer

A byte consists of 8 bits, which is the standard unit of digital information storage.

Question 3

What does ASCII stand for?

Accepted Answer

American Standard Code for Information Interchange

Answer

ASCII stands for American Standard Code for Information Interchange, a character encoding standard used to represent text in computers.

Question 4

Which number system uses base 16?

Accepted Answer

Hexadecimal

Answer

Hexadecimal uses base 16, with digits 0–9 and letters A–F representing values 0 to 15.

Question 5

What is the result of the binary addition 1011 + 0101?

Accepted Answer

10000

Answer

1011 (decimal 11) + 0101 (decimal 5) = 16, which in binary is 10000.

GCSE Revision Practice Test