A central processing unit (CPU, central processing unit) as an arithmetic and control core of a computer system, the information processing executing unit eventually run. Since the CPU produced since, logically structure, operational efficiency and functional extension has made tremendous development.
You can put the computer's CPU as the brain .
CPU is actually a VLSI (Very Large Scale Integration Circuit, VLSI ), it is a combination of the large number of transistors into a single integrated circuit chip.
CPU development has gone through several stages of development, with the number of bits of the CPU is basically developed from the 4, 8 beginning, a child's teacher to 32, and now 64.
And the number of bits refers to the number of bits of data can be processed by CPU-time.
The image of a little more understanding, then: is the number one Wang Zi small steamed bread you eat, your child may eat a maximum of five Wang Zi small steamed bread, you are now grown up, the mouth is also larger, one can eat 20 Wang Aberdeen a little bread. CPU is true development (Note: Do not bite to eat so much Wang Zi small steamed bread, easy to choke ~).
The main part of the CPU core comprising: a calculator and a controller .
As the name suggests, the operator is the main operation, is the control of the main controller. More detail, he said:
- Operator means that various components arithmetic and logic operations in operating a computer (it contains a lot of kinds of registers );
- Controller as a "decision-making body" CPU, the main task is to issue an order to play a role in coordinating and directing the whole operation of the computer system.
Cache (English: CPU Cache, herein referred to as buffer) is accessed by the processor means for reducing the average time required for the memory.
When the processor issues a memory access request, the request will first see if there is data in the cache. If there (a hit), not directly access the memory through the data return; if not (fail), will have first loaded the corresponding data in the cache memory, the processor then returns.
CPU cache size smaller than the memory but more memory is much faster than the exchange rate. Cache appears mainly to solve the CPU speed and memory access speed does not match the contradiction, because the memory read and write speeds than the CPU speed is much faster, so that CPU will take a long time to wait for the arrival of data or to write data to memory .
Our main desktop computer and use the main CPU brand: Intel (Intel) and AMD.
There is also a thing called like the CPU and GPU (image processor), but it is mainly used to process the image, not to be confused with the CPU.
Questions over the years
Problem 1 [2017] In the following, the part () of the CPU is not:
A. controller
B. operator
C. register
D. motherboard
correct answer: D.
Operator, and the controller are part of the CPU registers. But not the motherboard, the motherboard of a computer board, he has many of the above circuits, CPU, memory are installed on the motherboard.
[2008] Problem 1 microcomputer, the basic function of the controller is ().
A. coordination of various components of the machine control
B. arithmetic and logic operations implemented
C. acquiring external information
D. storing programs and data
correct answer: A.
A controller corresponding to the function item, corresponding to the option B calculator function options corresponding function input devices C, D corresponding to the options of memory.
[2010] Item 10 is the main memory access speed is much slower than the central processor (CPU) operating speed, so that the efficiency of the latter are affected. According to the principle of locality, the memory cell accessed by the CPU in a continuous generally tend to aggregate in a smaller area. Then, in order to improve the efficiency of the whole system, it is introduced () in the CPU.
A. Register
B. cache
C. Flash
D. external memory
The correct answer: B.
Tell Cache role is to coordinate the speed between the CPU and memory inconsistencies.
Question 7 [2012] The current market share of the foremost manufacturers of personal computers (), including Intel, AMD and other companies.
A. Monitor
B. the CPU
C. memory
D. Mouse
correct answer: B.
Intel and AMD are CPU brand.
Question 6 [2014] CPU, a memory, I / O devices are connected together by ().
A. Interface
B. Bus
C. control lines
D. System Files
correct answer: B.
Remember "bus" this thing. Information communication computer are transmitted through the bus.
[2015] The second title in the PC, PENTIUM (Pentium), Core, Celeron and other means ().
A. Name of manufacturer
B. hard drive model
type C. CPU's
model D. display
the correct answer: C.
PENTIUM (Pentium), Core, Celeron ...... these are the Intel (Intel) the company produced CPU models.
[5] 2015 title following statements is correct ().
A. CPU main task is to perform the data operation and control program
B. The memory has a memory capability, wherein the information is not lost at any time
the same two C. screen size, they must be the same resolution
D. Individual users can only Wifi use way to connect to the Internet
correct answer: A.
The main task is to perform a data operation of the CPU (responsible operator), and program control (controller is responsible). RAM also a memory which is a memory which stores the data will be lost after a power interruption. Display resolution has nothing to do with size, but with pixels related, 1920x1080 resolution display is 1920x1080 pixels, it has a point, even if it's a great display pixel is small, then it will not be a resolution high. Networked way more than Wifi, you can also take the form of a network cable access to Internet.
[2009] Problem 4 CPU on which the following statement is true:
A. CPU called the central processing unit (or central processing unit).
B. CPU can be run directly in assembly language.
C. Similarly lower frequency, the CPU 32 times faster than the 16-bit CPU running speed.
D. CPU was first invented by Intel.
The correct answer: A.
This question has been controversial, but option A is absolutely right, so the election A.
An important part of Question 6 [2011] register is () a.
A. hard
B. Cache
C. memory
D. central processing unit (CPU)
correct answer: D.
Computing, controller, registers, cache is a central processing unit (CPU) is an important part.
[2016] The following is not a question 4 CPU manufacturers is ().
Intel A.
B. AMD
C. in the Microsoft
D. IBM
correct answer: C.
Intel (Intel) and AMD is the main CPU manufacturers, and IBM also produced CPU, but the CPU is mainly used for the production of IBM's own high-performance business computers, and not open to the public sale.
Micsoft (Microsoft) is a software company, is the development of software, it does not produce CPU. Although Microsoft is the software started, but in recent years it like to enter the hardware, including the acquisition of Nokia, the production of notebook computers, etc. Surface Book.
Author: zifeiy