I have been sharing programming books in this blog from a long time, starting with core Java, I moved to other related technology e.g. Spring, Design patterns, Data Structure and Algorithms etc. Today, I am going to share some of the best UNIX and Linux programming books. The list contains some of the must read UNIX books from great writers like Sir Richard. Stevens, Sir Brain Kernighan, who has contributed so much to the development of UNIX operating system. Most of the books in this list are timeless, classics and don't age with time, much like UNIX, which is around from last 40 years and I am sure will be around for next 40 years, or maybe forever.
The OCEJWCD is the Oracle's version of SCWCD (Sun Certified Web Component Developer) exam, which tests candidate's knowledge on Servlet, JSP, and other web technology. The OCEJWCD stands for Oracle Certified Enterprise Java Web Component Developer. Like other Java certifications e.g. OCAJP or OCPJP, the key to success is selecting a good book, practicing code daily, and then solving as many mock questions as possible. In the last article, I have shared some of the best OCEJWCD books and in this article, I am going to share of the best free OCEJWCD 6 mock tests you can online. These mock exams are good for self-assessment and practicing before real exams.
How do public static final variable works in Java? what is the difference between a public static final variable and a public final (non-static) variable in Java? Does both are same? It is one of the simple, yet tricky questions which may Interviewers like to ask candidates, and would you believe that almost 50% Java developers miss the key point to mention here, which we'll see in this article. In short, No, they are not same. Even though both are final variables and you cannot change their value once assigned there is a very subtle difference between them. A public static final variable is a compile time constant, but a public final is just a final variable, i.e. you cannot reassign value to it but it's not a compile-time constant.
Labels: core java