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Java Foundation Pen Questions

1, object-oriented has (4) characteristics, respectively: (abstract), (inheritance), (encapsulation), (polymorphism). Some places say 3 features, remove abstraction. 2, A) use Super () in the subclass construction method to display the constructor method that calls the parent class, and super () must write in the first row of the subclass construction method, otherwise the compilation does not pass the B) Super () and this () do not have to be pl

. NET Pen Test set (iv)

and controllers are separated from each other, but they do have a tight connection, the view has no controller, its application is very limited, and vice versa, which prevents them from being reused independently.(3) A view of inefficient access to model data. Depending on the model operator interface, the view may need to be called multiple times to obtain sufficient display data. Unnecessary frequent access to unchanged data will also compromise op

Tomcat server and HTTP protocol pen questions

correctly asked toServletmake request processing() (DifficultyA)A./helloB./hello.doC./helloservletD./hello knowledge points to be examined : directory structure of Dynamic Web sites1 6 . in the Web The file and directory structure of the application, Web. XML is placed in () medium (difficulty A)A. Web-inf DirectoryB. conf directoryC. lib directoryD. Classes DirectoryWhat to examine :http protocol get vs . post differences 1 7 . HTTP in the agreement on Get Request and Post the claim is correct

. NET Pen Test set (iii)

completion , code highlighting and other functions to facilitate the development. In addition to VisualStudio, there are free, open-source Ide,visualstudio Express versions of SharpDevelop, MonoDevelop, and so on.25. What problems does Ajax solve? How do I use Ajax? What are the problems with Ajax that need attention? Where is Ajax used in the project?A: The problem of Ajax solution is "No Refresh Update page", with the traditional HTML form to update the page, each time to submit the request t

Java Featured pen Questions

the statement of D is incorrect.Structure of the Java heap: The JVM heap is the run-time data area, and the instances and arrays of all classes are allocated memory on the heap. It is created when the JVM is started. The heap memory that the object occupies is reclaimed by the automatic memory management system, which is the garbage collector. Heap memory is made up of surviving and dying objects. The surviving objects are accessible to the app and are not garbage collected. The object of death

JSP one or two chapter pen questions

I. What is the B/s architecture and what is the C/s architectureb/S (browser/server) browser/serverc/S (client/server) client/serverTwo. How the B/s architecture worksBrowser Request ServerSend to server via HTTP requestAccept RequestThe server resolves the url file]Generate HTML files based on parameters and files in the URLThen send the HTML file to the browserThe browser then receives the response from the HTML fileParse the resource file and display

Android realizes multimedia recording pen _android

Notepad involves only the storage of string, and there is no difficulty in reading, direct display with TextView can be. The main thing to do is to use SQLite to do a collation of the data.The recording pen needs to consider a relatively more: such as recording the interruption, recording when the user clicks the play button, not recording, the user clicks the Stop button, in the recording or playback of th

An Oracle dba pen test, interested friends can try, there are unexpected surprises oh!__oracle

Oracle dba Pen TestOne: SQL tuning class 1: Enumerate several table connection ways2: How to view SQL execution plan without the help of Third-party tools3: How to use the difference between CBO,CBO and rule4: How to locate the SQL that is important (consumes a lot of resources)5: How to track the SQL of a sessionWhat is the most concerned about 6:sql adjustment7: Talk about your knowledge of indexes (structure of indexes, impact on DML, impact on que

. NET pen question set (ii)

, all attributes must have corresponding values.XML is used to store and transfer data, and HTML is used to display the data4.string str = NULL with string str = "" describes the difference.A: string str = NULL does not allocate memory space to him, and string str = \ "\" assigns it a memory space with an empty string length. string str = NULL no string object, String str = "" has a string object.5. Write out an SQL statement: Take the 31st to 40th re

A day to accumulate a bit of Ali pen questions

to write a simple regular, not a complicated one, that's the point, it's going to take some time to learn.Here to borrow the answers of netizensvar reg = /^[a-za-z0-9_-][email protected][a-za-z0-9_-]+ (\.[ a-za-z0-9_-]+) +$/;9.p{*color: #000000;//ie7_color: #ff0000;//ie6Color: #00ff00;}10. varText = document.getElementsByTagName ("input") [0]; Text.addeventlistener ("Focus", Ofocus,false); Text.addeventlistener ("Blur", Oblur,false); functionOfocus () {if( This. value== "Please enter c

Front-end pen question set (2)

No. 11 In css styles, PX and Em are often used. What are their advantages and disadvantages and what are their differences in performance? Answer: PX is the pixel and Em is the relative unit. Em can accurately scale the text when you zoom in and view the webpage. When PX is used as the size, the text will not become larger when the page is enlarged in Some browsers. No. 12 If you are using Google Chrome or Apple Safari, how can you make the input element dis

Web front-End Pen Questions (3)--Wolf Factory

sample. In the various image formats supported by Photoshop, PSD accesses much faster than other formats and is powerful.(4) PNG format:(Portable Network Graphics format) suitable for any type, any color depth of the picture. You can also use PNG to save a picture with a palette. Lossless compression, support transparent, display speed, not support animation application effect, file slightly larger, is the default format of fireworks software. (5) SW

A good memory is better than a rotten pen. Oracle SQL Optimization (2)

usage of the cursor in SessionThe session cursor in Oracle is subdivided into three different types: implicit, explicit, and reference (ref CURSOR). These three types are often used in Sql,pl/sql code. An implicit cursor The most common session Cursor, it's everywhere. When executing SQL, Oracle automatically helped us create an implicit cursor to act as a carrier for that SQL, whose life cycle was entirely the responsibility of the SQL engine or the PL/SQL engine. Even so, we can detect some i

tutorial on the use of Xiaoyao pen Input method

If you can not pinyin will not Wubi, but also do not understand the keys on the keyboard, how to achieve network chat, browse the forum and write blog? Most people might think, "Isn't there a tablet?", admittedly, the handwriting board is convenient, but it has to spend money, then there is a software to achieve handwriting input it? Of course it is! Xiaoyao pen, a mouse will be turned into a stylus software, with it, users can directly use the mouse

How to draw a realistic pen using phtoshop

The most general effect Step1 Create a new document as shown in the diagram settings. Step2 Create a new layer set and it is named "pen". Select the Pen tool (P) and draw a shape as shown in the figure. and add a "gradient overlay" layer blending option to the layer. Step3 Create a new layer, draw another shape with the pen tool and name it "body.

PS Pen tool How to quickly pull the picture?

PS Pen Tool How to quickly pull the picture? PS software is widely used, by the audience like, today and small make better to know pen tool, and use pen tool. Friends who are interested in studying together 1. Create a blank white background with a 800*600 pixel 2, click the Horizontal Type tool, and then enter text, as shown 3, open a

Use of the PS pen tool

Let's start with a brief introduction to the concept of pen tools and paths. The pen tool, which is a vector drawing tool, has the advantage of being able to sketch a smooth curve that remains smooth after zooming or morphing. The Pen tool draws out the vector graph is called the path, the path is the vector path to allow is not closed the open shape, if the be

Win7 Touch pen Click on the panel to show how to do

Win7 System Touch Pen Click on the panel appears water ripple How to do? Now we can directly use the trackpad to click on the panel to do various things, such as painting, games, previewing the page. Recently, users use the stylus to preview the Web page, but the webpage automatically exits, and when it is serious, it will also appear card screen phenomenon. Touch Pen Click on the panel to appear ripples, t

"Turn" ballpoint pen test

Ballpoint Pen TestDirectory1. Functional Test 12. Performance Test 13. Security Test 24. Pressure Test 25. Installation Test 26. Portability Test 27. Interface Test 38. Document Testing 39. Stability Test 310. Robustness Test 311. Regression Test 31.Functional Testing(1), can not write(2), the amount of ink(3), the degree of handwriting thickness2.Performance Testing(1), how long can write(2), whether the nib is smooth(3), at which temperature can be

The correct posture of learning sketch and the method of grasping pen

The correct posture of learning sketch and the method of grasping penA sketch is a monochrome depiction with a pencil, a brush, a pen, a carbon pen, and even a hand-written brush that is now popular. Before learning to Sketch:1, choose the right posture and the position of the paintingThe correct sketch posture, helps the whole observation and the expression method application. In painting, the body should

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