Sun SCJP Certification exam experience exchange
Earlier test had Sun Certified Java Programmer, finished and has been busy, now, share the experience of the examination with you.
1) Java 2 Plat Form examination subjects is 310-025, has 59 questions, the passing line is 61%, that is the correct answer to question 36. Examination time is 90 minutes. Particularly repulsive is before the exam have a Agreement, even the time you read it was also taken into account. I began to do not know, is still read slowly, suddenly discovered that we have spent 3 minutes, and quickly begin to make title. Estimated Agreement Nothing important things, you can skip. Barely enough time, I probably spent 60 minutes for End title, leaving more than 20 minutes to check, even given the 3-5 questions I found errors are inadvertently falling into the trap set by the subject, they must be leave time to check. Unfortunately, the remaining 10 questions I did not have time to check around.
2) very narrow scope of the examination. Are basically the basic language knowledge, such as Swing, Jsp, Servlet, Jdbc, Beans and so on do not involve. Everyone can go to Sun website to download the examination outline. Narrow the scope of the examination does not mean easy, on the contrary, some very basic things over and over again,change it quickly, but more difficult.
3) only multiple-choice examinations, including radio and check. Most complex topics clearly has a few answers, not wrong.
4) the impression that almost all of the questions involve more than 2-3 points of knowledge, almost no one can see the answer on the topic. 70% of the test is for you for some procedures, and then run the results question the value of a variable. This topic is very easy to fall into the trap of accidentally being spent. 20% of the subject is to give you a few declarative sentence, choose the right one. These declarative sentence is a very partial examination of things is very partial, not good FOR. Basically, my experience is: If a subject can see the answer immediately, please look at the subject, in most cases is that you fall into the trap. If a topic is very specific you can look up what he wants to test your knowledge points, and that the subject on completion of half of the. The worst is to know what topics you want to test, but have forgotten or did not review the details of the relevant knowledge, so wild guess the guess.
5) One of the highlights of the examination Inner Class. Impression that more than half of the subject and his big Class sets, such as small Class. Review when I spent a lot of time in it, thinking that they know deeply, and the results of the examination is still a problem. Must be a thorough understanding of the relevant definitions, grammar, especially the usage of a wide range of Modifier. There are many very special Modifer rules. These rules must be mastered and borne in mind.
6) Another focus of the examination cycle statement. I thought of the statement is very familiar with the cycle control, resulting in some very partial examination test the usage of very special, although as can be made slowly, but wasted too much time in it is a real pity. Everyone a good look at the book.
7) others as: Casting, IO, Layout, Even Handling, AWT, Thread, Garbagecollection, Math Class and so on, there are a number of questions.
8 The examination questions are not reflected almost entirely practical application. If I have a Java compiler in the side, almost all the questions can be easily resolved. I feel that Sun hopes Java candidates can be as familiar with the Java compiler, like the special grammar and special rules.
9) I have collected many mock exam questions and the questions, there are nearly a thousand questions. It is strange that less than 10 questions in the examination, it appears that Sun’s exam item bank may be implemented is a dynamic question bank, test questions are not back, what hope is passed. And test procedures for a symbol change only slightly, the result is completely different questions, many topics unreliable. Therefore, everyone must be in a certain practical experience on the basis of a properly seen through counseling book, more questions, more analysis of questions, to think more about in order to more easily pass the exam.
10) regardless of how to assess the U.S. certification exams, anyway, a few more test certificate is not a bad thing, at least pay more convenient to find a job.
SUN SCJD certification
Java Developer Certification Sun Certified Java Deverloper (SCJD)
Java Developer certification examination to Sun designated JavaSL-285 for materials, machine test part is number 310-027.
Java Developer Certification courses:
The specific content of courses are: to explain the software development cycle of each stage can be achieved by using the appropriate Java type of procedure to understand the basic elements of API design, according to project component to determine the functional requirements; description of relational database design and design principles ; understanding of JDBC, ODBC and its use; to create a good GUI design principles to design their own user interface; using Socket to connect to the proper format for transmission of data, to create a multi-tier Java applet or application; understand Solaris and Windows platforms Transplantation.
Java developer certification exams:
Java developers at the examination procedures for the design and test machines in two parts. Among them, some open-time programming. Candidates register, you can download from the specified examination questions, and in accordance with the procedures called for the design of the topic. At the specified time period (1 year), the candidate is required to return to design the Java program. However, under normal circumstances, candidates will be 2-3 months to process returns. Machine test procedures will answer some of the subject, as long as the true understanding and mastery of the design process and content of the course, answer this part of the exam questions would be no problem. Developer certification exam is a Java developers a comprehensive capacity assessment, through the course of learning to cultivate a program designers the ability of independent programmers, and the certificate is made of such a powerful ability to prove .
Sun Java Platform, Enterprise Edition 5 Web 組件認證開發工程師 (310-083)
Sun認證Java平臺的Web組件開發，Sun認證程序員使用Java技術Servlet和JavaServer Pages（JSP）的應用程序接口（API）來開發Web應用程序都將用企業版5認證考試（任何版本）。在妳參加Sun認證的Web組件開發程序之前，您必須是Sun認證的程序員Java平臺（任何版本）。
The Sun Certified Web Component Developer for the Java Platform, Enterprise Edition 5 certification exam is for Sun Certified Programmers (any edition) who are using the Java technology servlet and JavaServer Pages (JSP) application program interface (APIs) to develop web applications. Prior to beginning the Sun Certified Web Component Developer program, you must be a Sun Certified Programmer for the Java platform (any edition).
Delivered at: Authorized Worldwide Prometric Testing Centers
Prerequisites: Sun Certified Programmer for the Java Platform (any edition)
Exam type: Multiple Choice and Drag and Drop
Number of questions: 69
Pass score: 70% (49 of 69 questions)
Time limit: 180 minutes
KillTest認證題庫網專業提供SCWCD 310-083最新考古題下載，完全覆蓋310-083考試原題，題庫在手，認證無憂。DEMO考古题:
1. To take advantage of the capabilities of modern browsers that use web standards, such as XHTML and CSS, your web application is being converted from simple JSP pages to JSP Document format. However, one of your JSPs, /scripts/screenFunctions.jsp, generates a JavaScript file. This file is included in several web forms to create screen-specific validation functions and are included in these pages with the following statement:
10. <head>
11. <script src=’/scripts/screenFunctions.jsp’
12. language=’javascript’
13. type=’application/javascript’> </script>
14. </head>
15. <!– body of the web form –>
Which JSP code snippet declares that this JSP Document is a JavaScript file?
A. <%@ page contentType=’application/javascript’ %>
B. <jsp:page contentType=’application/javascript’ />
C. <jsp:document contentType=’application/javascript’ />
D. <jsp:directive.page contentType=’application/javascript’ />
E. No declaration is needed because the web form XHTML page already declares the MIME type of the
/scripts/screenFunctions.jsp file in the <script> tag.
Answer: D
2. Given the JSP code:
10. <html>
11. <body>
12. <jsp:useBean id=’customer’ class=’com.example.Customer’ />
13. Hello, ${customer.title} ${customer.lastName}, welcome
14. to Squeaky Beans, Inc.
15. </body>
16. </html>
Which three types of JSP code are used? (Choose three.)
A. Java code
B. template text
C. scripting code
D. standard action
E. expression language
Answer: BDE
Sun助理認證標準版的Java平臺，1.0版（CX-310-019）
本認證可為使用Java技術從事應用程式開發或軟體專案管理工作提供理想的入門管道。本認證將驗證 OO 概念的基本知識、Java 程式設計以及 Java 平台與技術的一般知識。要獲得此認證，受測者必須成功完成一個測驗。請透過以下連結瞭解詳細資訊、測驗目的並進行購買：
310-019：Sun Certified Associate.Java Platform.Se. Exam Version 1.0
認證描述:
Sun助理認證的標準版Java平臺，310-019考試，1.0版考試認證提供使用Java技術到應用程序開發或軟件項目管理的職業入門。這個全球性的證書驗證了面向對象的基本知識，面向對象的UML概念，Java編程語言和Java平臺和技術的壹般知識。這門考試的考生包括：入門級的Java程序員，學習想成為Java程序員的學生，項目或項目經理與Java軟件開發行業的技術工作者。
在網站上購買的考試只能在美國使用。如果您居住在美國以外地區請選擇壹個國家，詢問在您的國家提供的產品。只可在壹個授權Prometric考試中心參加考試，壹旦購買考試券後，妳使用考試券的有效期為壹年時間。請註意考試券不再以任何理由退還。
詳細信息:
考點地區：授權Prometric考試中心
首要條件：無
其他考試/為這項認證所需的任務：無
考試類型：多選題和拖放
問題數量：51
評分標準：68％（51個問題中超過35個正確）
考試時間：115分鐘
310-019 Exam考古題由KILLTEST專家精心打造，包括了當前最新的真實310-019考試題目及全部正確答案。
SUN認證-Java雲計算兩種方法的比較
最近，人們在思考如何使用Java來實現雲計算，我看到了兩種趨勢性的方法。它們存在交叉重疊處而並非互相排斥，但總體而言它們在項目方面有著非常不同的表現：
重面向UI（Heavy UI oriented）
這種類型的應用或框架通常提供基於UI的控制臺、管理有用、插件等，這為管理雲中的資源比如開始和停止圖像等提供了唯壹的方法。這種方法的關鍵特征是它需要大量用戶的輸入和人的幹預，所以這變得相對不動態、不隨需而變。最好的例子是：RightScale, GigaSpaces, ElasticGrid.
重面向框架（Heavy framework oriented）
這種方法非常強調雲中資源管理的動態性。其關鍵特征是它不需要用戶的輸入和人的幹預，所以的資源管理可以通過grid/cloud中間件來程序化地完成。Google App Engine （for Python）, GridGain就是這方面最好的例子。
現在，我們可以輕易地看到兩種方法的各自好處。傳統的計算環境中，網絡和系統管理員管理雲（傳統的數據中心也是這麽管理的）,開發者對它有很少的控制，因而第壹種方法對此非常有效。
就像我說的，第二種方法聽起來有些新穎和現代。它的目的是，通過提供相對定位的透明度來掃除本地工作站與雲（內部或外部的）之間的障礙，從而開發者寫代碼、建立並運行可以通過完全壹樣的方法，而不必在乎這些工作是在本地工作站還是幾千公裏外的雲上還是這二者壹起完成的。
Java應用：Fedora Linux 8系統下配置JDK
1. 到sun.com下載jdk-6u4-linux-i586.bin,假設下載到當前用戶目錄下；
2. 在/home/abin下建立software目錄，拷貝jdk-6u4-linux-i586.bin到software目錄；
3. 找開終端，轉到/home/abin/software,執行命令sh jdk-6u4-linux-i586.bin,屏幕會顯示壹些協議文件，壹路回車，到最後會認妳確認安裝，輸入yes,回車，稍等片刻……，會在/home/abin/software下生成壹個文件夾jdk1.6.0_04,這就是jdk的安裝目錄。
好，下面開始設置jdk的環境變量：
4. 如果只供當前用戶使用，那麽進入當前用戶目錄，即（/home/abin）,編輯。bashrc文件，在最後加入環境變量，如下：
QUOTE: JAVA_HOME=/home/abin/software/jdk1.6.0_04 CLASSPATH=.:$JAVA_HOME/lib/tools.jar:$JAVA_HOME/lib/dt.jar PATH=$JAVA_HOME/bin:$PATH export JAVA_HOME CLASSPATH PATH |
5. 如果要讓所有用護使用，那麼以root用護登錄，進入/etc目錄，在profile文件末添加以上環境變量。
註：在設置環境變量時需註意幾點
a）首先是環境變量的格式，以前在windows下設置時路徑間用分號隔開，在linux下要用冒號；
b）其次，要查看系統中是否已存在需設置的變量，如果有，則必須在同名的變量後加上”:$變量名”,例如，如果以前系統中存在PATH變量，則在設置PATH變量時必須寫成PATH=$JAVA_HOME/bin:$PATH,不然最後設置的內容會覆蓋掉以前的內容。
查看系統中是否存在同名變量，可以使用echo命令，格式如下：echo $PATH
6. 設置完成後，在終端輸入java -version 會顯示JDK版本信息，表示安裝成功。