J2ME Interview Questions and Answers
Question - 41 : - What Is Midlet ?
Answer - 41 : - A MIDlet is an application written for MIDP. MIDlet applications are subclasses of the javax. microedition. midlet .MIDlet class that is defined by MIDP.
Question - 42 : - What Is Midlet Suite?
Answer - 42 : - MIDlets are packaged and distributed as MIDlet suites. A MIDlet suite can contain one or more MIDlets. The MIDlet suite consists of two files, an application descriptor file with a .jad extension and an archive file with a .jar file. The descriptor lists the archive file name, the names and class names for each MIDlet in the suite, and other information. The archive file contains the MIDlet classes and resource files.
Question - 43 : - What Is Midp?
Answer - 43 : - The Mobile Information Device Profile (MIDP) is a specification for a J2ME profile. It is layered on top of CLDC and adds APIs for application life cycle, user interface, networking, and persistent storage.
Question - 44 : - What Is Midp-ng?
Answer - 44 : - The Next Generation MIDP specification is currently under development by the Java Community Process. Planned improvements include XML parsing and cryptographic support.
Question - 45 : - What Is Mobitex?
Answer - 45 : - Mobitex is a packet-switched, narrowband PCS network, designed for wide-area wireless data communications. It was developed in 1984 by Eritel, an Ericsson subsidiary, a nd there are now over 30 Mobitex networks in operation worldwide.
Question - 46 : - What Is Modulation ?
Answer - 46 : - Modulation is the method by which a high-frequency digital signal is grafted onto a lower-frequency analog wave, so that digital packets are able to ride piggyback on the analog airwave.
Question - 47 : - What Is Msc ?
Answer - 47 : - A Mobile Switching Center (MSC) is a unit within a cellular phone network that automatically coordinates and switches calls in a given cell. It monitors each caller's signal strength, and when a signal begins to fade, it hands off the call to another MSC that's better positioned to manage the call.
Question - 48 : - What Is Obfuscation?
Answer - 48 : - Obfuscation is a technique used to complicate code. Obfuscation makes code harder to understand when it is de-compiled, but it typically has no affect on the functionality of the code. Obfuscation programs can be used to protect Java programs by making them harder to reverse-engineer.
Question - 49 : - What Is Optional Package?
Answer - 49 : - An optional package is a set of J2ME APIs providing services in a specific area, such as database access or multimedia. Unlike a profile, it does not define a complete application environment, but rather is used in conjunction with a configuration or a profile. It extends the runtime environment to support device capabilities that are not universal enough to be defined as part of a profile or that need to be shared by different profiles. J2ME RMI and the Mobile Media RMI are examples of optional packages.
Question - 50 : - What Is Ota ?
Answer - 50 : - Over The Air (OTA) refers to any wireless networking technology.