Paper 1 - Theory Fundamentals
Paper 2 - Problem Solving & Programming Skills
Paper 3 - Advanced Theory
Paper 4 - Practical Programming
1 of 2

Information Representation

This section is part of the AS specification, but creates a foundation for the full A Level. There is a reasonable expectation for some of this content to return in paper 3 and so it is worthwhile returning to this when you begin the advanced course.

TopicI should be able to…
1.1Show understanding of binary magnitudes and the difference between binary prefixes and decimal prefixes
Understand the difference between and use:
• kibi and kilo
• mebi and mega
• gibi and giga
• tebi and tera
Convert between
(i) positive denary and positive binary
(ii) positive denary and positive hexadecimal
(iii) positive hexadecimal and positive binary
Use the binary, denary, hexadecimal number bases and Binary Coded Decimal (BCD) and one’s and two’s complement representation for binary numbers
Perform binary addition and subtraction
Describe practical applications where Binary Coded Decimal (BCD) and Hexadecimal are used
Show understanding of and be able to represent character data in its internal binary form, depending on the character set used
source: Cambridge International 9618 Specification