operation
1. What is the programming language?
Programming language is communication between programmers and computer media
2. What is programming?
Programming means: programmer based syntax of a programming language will want to let the computer do the things written to a file in mind, this process is called programming
3. Why programming?
The computer is like a slave to the purpose of the program is to want to enslave computer, the computer as a human slave, let the computer help humans work to replace manpower
4. What is the role of the composition of the top five computer respectively?
- Controller Role: computer command system, the equivalent of the human brain, directing the operation of body organs, but the brain does not act arbitrarily command of the body, the brain only after receiving instruction will control the body action
- Operator action: arithmetic operation is a computer system, arithmetic and logic operations
- The memory (memory + external storage) action: a storage system of a computer. Memory for temporarily storing data within the computer hardware devices, the advantages (compared to the external memory): access speed, the disadvantages (compared to the external memory): small capacity, power disappears (not permanent). External memory is a hardware device, the advantage of permanent storage of data within the computer (more in memory): capacity, data may be permanently stored; disadvantages (more in memory): slow access speed
- The input device action: input information (programs, data, voice, text, graphics, images, etc.) for the computer
- Output device effect: the computer output information
The mechanical hard drive works?
Stored on the hard drives are mechanically 0 and 1, the mechanical arm to read data, data storage tracks, sector: a block consisting of a plurality of tracks, the starting position
Looking data Time:
Average latency: mechanical arm to disk time 5ms (solid-state drives do not have this time)
The average seek time data: (0 + 8.3) / 2
Average delay time: 7200/60 = 120 (r / s)
1/120 = 0.0083 (s / r) = 8.3 (ms / r)
(0+8.3)/2=4.15(ms/s)
Average seek times to find data + average latency =
6.qq start the process?
- Double-click the windows desktop QQ icon (shortcut qq.exe corresponding path)
- Double-click the icon that is sent to the operating system instructions that tell the hard disk address corresponding operating system software QQ ,, and let the operating system starts this path
- Operating system receives an instruction to send instructions to the memory control CPU
- After accepting an instruction memory to send instructions to the hard disk, the hard disk memory to the software code read QQ, QQ start