tailieunhanh - Tiếng anh chuyên ngành công nghệ thông tin part 2

Tham khảo tài liệu 'tiếng anh chuyên ngành công nghệ thông tin part 2', công nghệ thông tin, tin học văn phòng phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Vocabulary binary notation n biểu diễn nhị phân character n ký tự representation n diễn đạt biểu thị figure n sổ liệu con số equivalent adj tương đương pixel n điểm ảnh refresh v làm tươi lại buffer n bộ đệm bộ nhớ trung gian monochrome n đơn sắc color palette n bảng màu graphics adaptor n bộ thích ứng đồ họa primary color n màu chính màu nguyên thủy I. Reading A. With a partner try to answer these questions. 1 How many digits does a binary system use What is a bit 2 What is the difference between binary notation and the decimal system Give some examples. 3 What is a collection of eight bits called 4 One kilobyte IK equals 1 024 bytes. Can you work out the value of these units 1 megabyte .bytes 1 024 kilobytes 1 gigabyte .bytes 1 024 megabytes kilo- one thousand mega- one million giga- one thousand million 5 What does the acronym ASCII stand for What is the purpose of this code B. Now read the text to check your answers or to find the correct answer. 26 Lesson Ỉ Computers today Units of memory Bits - basic units of memory Information is processed and stored in computers as electrical signals. A computer contains thousands of electronic circuits connected by switches that can only be in one of two possible states ON the current is flowing through the wire or OFF the current is not flowing through the wire . To represent these two conditions we use binary notation in which 1 means ON and 0 means OFF. This is the only way a computer can understand anything. Everything about computers is based upon this binary process. Each 1 or 0 is called a binary digit or bit. Bytes and characters 1 s and Os are grouped into eight-digit codes that typically represent characters letters numbers and symbols . Eight bits together are called a byte. Thus each character in a keyboard has its own arrangement of eight bits. For example 01000001 for the letter A 01000010 for B and 01000011 for c. The ASCII code The majority of computers use a standard system of the binary representation of