Computer Science 12 (advanced), version 2019

Computer Science 11 (advanced), version 2019

Ссылки на материалы для подготовки к экзаменам

Fix point numbers and Floating point numbers

1. Fix point numbers
2. Floating point numbers
3. Why use binary floating point numbers
4. Converting binary floating point to decimal
5. Normalisation float point numbers
6. Questions
7. Exercises
8. Exam questions

12.1.1.6 use binary numbers with a fixed point to represent fractional numbers with a given number of bits 

12.1.1.7 represent positive and negative floating-point decimal numbers in binary. 

Binary addition and binary multiplication

1. Binary addition
2. Binary multiplication
3. Questions
4. Exercises
5. Exam questions

12.1.1.3 perform the arithmetic operations: addition and multiplication of binary numbers   

Represent positive and negative numbers in two's complement

12.1.1.4 represent positive and negative numbers in two's complement and specify the range of n bits.
12.1.1.5 perform subtraction using two's complement 

1. Signed and unsigned binary numbers.
2. Two's complement
3. Converting a negative decimal number to a binary
4. Binary substruction using two's complement
5. Questions
6. Exercises
7. Exam questions

Binary, hexadecimal numbers

1. The binary number system
2. Converting from decimal to binary
3. The hexadecimal number system
4. Converting from binary to hexadecimal and vice versa
5. Questions
6. Exercises
7. Exam questions

12.1.1.1 convert binary numbers to hexadecimal  

12.1.1.2 explain the advantages of using hexadecimal numbers in computer systems 

ASCII таблица - множество символов, каждый из которых имеет объем 7 бит, что позволяет закодировать 128 различных символов.

В расширенной таблице ASCII кодов каждый символ имеет объем 8 бит (1 байт), что позволяет закодировать 256 различных символов.