Java Technology Update

Create a war file. Go to WebLogic console. http://localhost:port/console In the Change Center section of the console, click the Lock and Edit button to open the server instance for changes Go to Domain Structure > Deployments You will see a Summary of Deployments. Click on Install button. Click on the link upload your file(s). Browse to the location on your file system where the .war file was saved. Click the radio button next to the .war file and click Next. Since this is an application, for the targeting style, make sure Install this deployment as an application is selected. Click Next. Click Next again to accept the defaults in this next pane, then click Finish. You will now get a summary list of the settings for the deployment. Click the Save button. If everything went ok, you will see a message in green that says Settings updated successfully. Back in the Change Center section of the console, click the green Activate Changes button. The application has been 'prepared',

6 technologies you should learn this year MORE LIKE THIS Love and hate for Java 8 Get real, Bill -- we do need more H-1Bs for tech workers The savvy tech strategy behind Obamacare Technology moves fast! If you're stuck in your cube  editing Java  1.3 code or messing with PowerBuilder, you probably live in an area of the country where there's only one employer. Most of us have to figure out what we need to learn, or at least become acquainted with, just to keep our careers on track. If you want to stay sought-after and raise your rate, you should be acquainted with the following technologies. Why listen to me? Because I get a unique bird's-eye view as a developer straddling a management, marketing, and sales roles. My informal survey says: This is the least you should familiarize yourself with by next year. 1. Hadoop.  If you learn nothing else this year,  make it Hadoop . You need to know what MapReduce is and how to use it. Frank

MOST IMPORTANT QUERIES (90% ASKED IN INTERVIEWS) 1.Query to find Second Highest Salary of Employee?(click for explaination) Answer:- Select distinct Salary from Employee e1 where 2= Select count(distinct Salary) from Employee e2 where e1.salary<=e2.salary; 2.Query to find duplicate rows in table?(click here for explaination) Answer :- Select * from Employee a where row_id != select max(row_id) for Employee b where a.Employee_num=b.Employee_num; 3.How to fetch  monthly Salary of Employee if annual salary is given?(click here for Explaination) Answer:-    Select Employee_name,Salary/12 as ‘Monthly Salary’ from employee; Click here to get information on ROW_ID 4.What is the Query to fetch first record from Employee table? Answer:-  Select * from Employee where  Rownum  =1; Click here to get What is Rownum? 5.What is the Query to fetch last record from the table? Answer:- Select * from Employee where Rowid= select max(Rowid) from E

Core java interview questions and answers Core java interview questions play a vital role in java/j2EE interviews. Whether you are fresher or experienced, you are going to face core java interview questions. You can also go through  top java interview programs  for practicing java programs. Here I am providing some important core java interview questions with answers. 1. What do you mean by Platform independence of java? You can write and compile program in one Operating system and run in other operating system. For example: You can compile program in Windows and can run it in Unix. 2. What is difference between JVM, JRE and JDK ? JVM :  JVM stands for Java Virtual Machine. It is virtual machine which actually runs the byte code. JRE :  JRE stands for Java Runtime Environment. It provides runtime environment for java code. It has JVM , libraries such as rt.jar and other files. JDK :  JDK stands for Java development kit. It is superset of JRE, it has JRE + compilat