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Preparing for the SCMAD CX 310-110 J2ME Certification Exam

Sun Certified Mobile Application Developer SCMAD CX-310-110 for the Java 2 Platform is poised to be one of the most coveted certifications in the coming times. The wide recognition of this J2ME certification can be attributed to the burgeoning mobile market all over the world. And, Java being a platform independent language is the best candidate for programming wireless devices, such as mobile phones and Personal Digital Assistants (PDAs).

This exam might be slightly tougher than the other exams since the technology is fairly new and the community support is limited. Since the API set is relatively small, you can cover the topics quickly. On an average, it should take you around a week to cover each topic if you are familiar with Java and have written or attempted to write a few programs using J2ME. If you are new to wireless programming, you might want to allocate around 2-3 months (2 hours a day at least) for preparation.

• Download the Java Wireless Toolkit (2.0 or above).
• If you have a J2ME enabled cell phone, download the toolkit from that vendor. For example, Nokia and Sony provide free toolkits and emulators that will help you program in those devices.
• Download the PDF versions of the specifications mentioned above.

Everyone prepares for the certification exam to their best ability yet the difference between the one who succeeds with a high score in the SCMAD J2ME exam in first attempt and others is practicing lots and lots of mock exam questions and practice writing lots and lots CODE snippets.

J2ME Mock exams help you to judge yourself best and give you a reality check on your preparation. You are about to spend USD $ 300 (plus your time and effort) on the voucher of the exam, it may be a good idea to give it all you have in your preparation.

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So, lay aside your fears and anxieties and see what difference your hard work and Whizlabs sample J2ME mock tests can make to your certification success.

The best way to get an idea about wireless programming is to actually write some programs and deploy them to a cell phone. This will go a long way in your preparation, since the creation and delivery of wireless applications is quite different from that of the standard or enterprise applications. You should develop at least one program for each specification to get a feel of the API. Some of the programs you might want to develop are

1. A program that takes a name and prints out "Hello " (tests the UI API)
2. A simple game or a drawing, like the traditional Paddleball game or various geometric shapes moving in the screen (tests the Game API)
3. A program to read an image off a website and display it on the phone (tests networking)
4. A 'signed' Hello World! Application (tests security)
5. A program that plays a simple tune (tests MMAPI)
6. A program that displays a text message (tests WMA)
7. A program that calculates tip for various pre-defined scenarios (tests RMS)

To understand the concepts of J2ME programming, you can read the official J2ME tutorial, which is very comprehensive. Some useful books are also listed in the resources section. Most of the questions will be code-based and hence, it is very important that you understand how the code is structured for various specifications.

Tips and pitfalls

• Understand the conceptual difference between a J2ME configuration (like CLDC) and a J2ME profile (like MIDP).
• Memorize the software and hardware requirements of the various specifications.
• Memorize the class hierarchies of important APIs like Generic Connection Framework, High level and low level UI API, Media classes of MIDP 2.0 and MMAPI 1.1.
• The exam tests the understanding of the features and differences between low level and high-level API for UI programming. So, learn them well.
• Understand that differences between the media support of MIDP 2.0 and the MMAPI 1.1.
• Apart from the knowledge of writing proper J2ME code, the exam also tests the ability to write valid Java Application Descriptor (JAD) and manifest files that are used to markup the deployment details of an application. So, practice writing the descriptors well and deploy the application in the toolkit to understand the behavior of various deployment tags.
• Remember that the exam is a vendor neutral exam. So, you can safely ignore learning the vendor APIs (like the APIs provided by Nokia, Sony Ericsson, and so on).
• The best reading material for this exam is the specification document. So, allot enough time to go through these documents and learn the concepts and API well.
• Make sure what you read is relevant to the exam objectives. A common pitfall is reading and spending time on things that you may not require for the exam.
• As mentioned earlier, try to develop a practical example for each concept as this will help in a better understanding of the concepts.

The time and effort required for preparation depends on your experience (or rather lack of it!!) in programming, especially in Java Technology.If passing the SCMAD exam is on your list of priorities for the year start with our diagnostic exam right away it is free for a week. This has been successful 99.7% of times with over 50,000 people since October 2000. God forbid! In case you do not pass the Certification Exam, you have nothing to lose with us we will refund back the entire amount you have spent with us without asking any questions. Period!

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