Data

Question 1

What is denary?

Answer 1

Denary is a number system that uses 10 symbols to represent each digit. The symbols range from 0-9.

Question 2

What is binary?

Answer 2

Binary is a number system that uses two symbols for each digit. Only 0 and 1 are used in binary.

Question 3

What is hexadecimal?

Answer 3

Hexadecimal is a system that uses 16 different symbols. It uses the digits 0-9 and then A-F.

Question 4

What are the methods used to express negative numbers in binary?

Answer 4

Sign and magnitude along with two’s compliment.

Question 5

What is sign and magnitude?

Answer 5

The most significant bit (MSB) of the binary number is a designated sign bit. If the number is positive then the MSB is set to 0. If the number is negative then the MSB is set to 1.

Question 6

What is two’s compliment?

Answer 6

The place value of the MSB is made negative. This allows us to express negative numbers by subtracting the largest possible place value, and then adding the difference back on.

Question 7

How does binary addition work?

Answer 7

0 + 0 = 0, 1 + 0 or 0 + 1 = 1. However, 1 + 1 = 0 as we can’t use the symbol 2 in binary, so we carry the 1 and put 0 in the current place.