what is docsis

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What is the JAVA environment variable? Why do I need to set it? What is the operating principle of it? __ Small Knowledge

: The previous point in this configuration indicates the current path, plus the Dt.jar and Tools.jar two files are added to the CLASSPATH environment variable. From the top I don't know if you've found any problems, A 1.7 version is still using the 1.4 and the previous CLASSPATH environment variable configuration method, which seems to illustrate a problem, it industry rapid development, knowledge is con

What is a thread and what is the difference between a thread and a process?

A thread is sometimes called a lightweight process, which is a smaller unit of activity than a process, and it is an execution path in the process. A process can have multiple execution paths that are threads.The main differences between threads and processes:1. A thread is an integral part of a process, a process can

What is a row-type database and what is a column database

together , then stores the next column of data, and so on. ; Smith,jones,johnson; Joe,mary,cathy; 40000,50000,44000;This is just a simplified statement.In the relational database domain, except the traditional Oracle, SQL Server, MySQL and other row-type database. There is a growing interest in the Data Warehouse-listed database.Two-control1 rows are more suitable for OLTP, querying all

What is a bigger smarter? (What is the bigger the smarter ?)

// Is bigger smarter? (What is the bigger the smarter ?) // PC/ultraviolet A IDs: 111101/10131, popularity: B, success rate: high level: 2 // verdict: accepted // submission date: 2011-10-10 // UV Run Time: 0.032 S // copyright (c) 2011, Qiu. Metaphysis # Yeah dot net // [Problem description] // some people think that the larger the elephant

What is an embedded system? What is an embedded operating system?

Embedded system:Embedded system refers to the computer as a part of a special system exists, embedded in a larger, dedicated system of computer systems, is a application-centric, computer technology-based, software hardware can be cut, function, reliability, cost, volume, power consumption has strict requirements of the special computer system.Embedded operating system:Embedded operating system is a kind of

What is the function of the millet roaming card? What is the function of the millet roaming card?

What is the function of the millet roaming card? Virtual Card Services You have heard, the Millet roaming card is a virtual card services, it is not necessary to purchase the entity SIM card can be in our travel abroad to enjoy the convenient mobile Internet services, is no

What is Alipay's reputation and privilege day? What day is word of mouth privilege?

Alipay What is the day of payment of Word-of-mouth? Alipay Day is the day Alipay paid the day is a new payment treasure to launch a select side of the big food activities, 28th each month are paid PO word-of-mouth Rights Day, the day of the event, agreed to pay the real name of the real user in the "Word-of-mouth-f

What is a lambda function? What good is it?

A lambda function is a function that can receive any number of arguments (including optional arguments) and return a single expression value. Lambda functions cannot contain commands, and they contain no more than one expression. Do not attempt to cram too much into the lambda function; If you need something more complicated, you should define a normal function, and then you want to make it long enough.What is

What is TFTP(tftpd32.exe? What is TFTP(tftpd32.exe?

What is TFTP (tftpd32.exe)? Tftpd32.exe is a file transfer tool using the TFTP protocol, the older version of our router uses this tool software to upgrade the router. In general, the tool and the upgrade file in the same compressed package, decompression download to the upgrade program can be seen, do not need to download separately. The following fi

What is the python abs function? What is the use of ABS functions?

In this article, we'll look at the abs function in Python, and in this article we'll explain what the ABS function means and where it's generally used, as well as its role and meaning. Describe The ABS () function returns the absolute value of the number. Grammar The following is the syntax for the ABS () method: ABS (x) Parameters X--Numeric expression. return value The function returns the abs

What is the average and the latest price? What is the MACD DIFF DEA indicator?

Average price = total value of the deal at the current moment/dealLatest Price = Price at current timeI. Smooth similarities and differences average (moving Average Convergence divergence)Principle:MACD (Moving Average Convergence divergence) Chinese name: Smooth similarities and differences moving averages are published by Gerald Appel First in systems and forecasts, The paper mainly uses the long and short-term two smoothed average lines to calculate the difference between the two, as the basi

Java.exe and Javac.exe, what is the relationship between the JVM and what is the role of environment variables

Javac a Java file into a binary fileJava Run binary file produces results JVM Java Virtual machines, providing a running environment for Java compilation operations What is the role of environment variable environment variables The environment variable contains the information that one or more applications will use, and when the system is asked to run a

The previous line is $ sql2's value assignment, but an error is reported during the running of the program, prompting that $ sql2 is not declared. what is going on?

The previous line is $ sql2's value assignment, but an error is reported during the running of the program, prompting $ sql2 not declared. what is going on? $ Sql2 = "select nbsp; count (id) nbsp; from nbsp; emp"; $ sqlHelper- gt; execute_dql_f is assigned a value for $ s

What is the Turn-key, what to do with the Turn-key, and what to do with the Turn-key.

Reprinted from: http://www.52rd.com/Blog/Detail_RD.Blog_SHRDFresh_52276.html Typhoon days, heavy rain, sleepy at home, left and right nothing .. Continuing the previous article titled "Qualcomm QRD vs. mediainfo TK, the war that just started", I found many comments about the Turn-key topic, so I saved another article. Now the world is claiming to provide the Turn-key solution, and it seems that there is n

What are the three layers of the front-end page, and what are the respective ones? What is the role?

) are not interfering with each other, and cannot be mixed together. Also give the behavioral layer a "fallback", taking into account what happens if your users disable Javascript? is not a webpage can also function normally.Amount Said a long time found are some of the theoretical things, as some basic ideas, specific people in the process of continuous practice to slowly experience.In short, these three t

Browse the online resources to find out what the compilation principle is? What are the benefits of learning how to compile? What loss do you have to learn? How to learn the principles of compiling?

When I first approached, I thought the compiling principle would be very dull. But I'm browsing the information on the Internet. And let me have a new discovery, found that this course is really important. Baidu explains to us is that the compiling principle is a major professional course of computer science, which aims to introduce the general principle and basi

It's both what you say and the way you say it. (what you say is as important as what you say)

The question is not just what you have, what you say, but how you pack it. Unless you can communicate and share with them, you have the best idea, the most coolCode, Or a better architecture will eventually be fruitless. As a developer, we must communicate with each other. Communicate with customers, demand analysts, project managers, technical directors, boss,

What is a bid for a single page? What is the content that should be reflected?

A lot of friends must have heard of the price of a single page, and, no matter what industry, medical or Taobao customers, products, basically will be used to auction a single page to marketing their own products. At this point, we can see that we are more pro-Lai in the bidding of a single page, but for the price of a single page is not particularly clear, for the price of a single page to reflect

What is a new lithium battery? What is a polymer battery?

The new lithium battery (polymer battery) is short for Polymer lithium-ion battery and one of the types of lithium-ion battery. To understand what a new lithium battery is, in addition to providing the definition of the new lithium battery, we also need to find the answer from its classification, characteristics and target market.I. Definition: the so-called new

What is a thread? What is the difference between it and the process? Why multithreading ?, Multi-thread

What is a thread? What is the difference between it and the process? Why multithreading ?, Multi-thread A thread is an execution unit in which the program code can be executed during execution. In Java, a thread has four states: running, ready, suspended, and ended. A proces

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