Interview Questions.

Top 100+ J2me Interview Questions And Answers

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Top 100+ J2me Interview Questions And Answers

Question 1. What Is J2me ?

Answer :

Java 2, Micro Edition is a set of specifications and technology that pertain to Java on small gadgets. The J2ME moniker covers a wide variety of devices, from pagers and cellular telephones via set-top packing containers and car navigation structures. The J2ME global is split into configurations and profiles, specs that describe a Java environment for a selected magnificence of device.

Question 2. What Is J2me Wtk ?

Answer :

The J2ME Wireless Toolkit is a set of tools that offers developers with an emulation surroundings, documentation and examples for developing Java programs for small gadgets. The J2ME WTK is based totally on the Connected Limited Device Configuration (CLDC) and Mobile Information Device Profile (MIDP) reference implementations, and can be tightly incorporated with Forte for Java .

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Question 3. What Is 802.Eleven ?

Answer :

802.Eleven is a set of specs for wireless networks advanced by using the Institute of Electrical and Electronics Engineers (IEEE). 802.Eleven uses the Ethernet protocol and CSMA/CA (provider sense more than one get right of entry to with collision avoidance) for course sharing.

Question 4. What Is Api ?

Answer :

An Application Programming Interface (API) is a set of training that you may use for your own utility. Sometimes referred to as libraries or modules, APIs permit you to write an utility with out reinventing not unusual portions of code. For example, a networking API is something your software can use to make community connections, with out your ever having to apprehend the underlying code. 5. What is AMPS.

Advanced Mobile Phone Service (AMPS) is a first-generation analog, circuit-switched cell smartphone community. Originally operating inside the 800 MHz band, carrier changed into later expanded to consist of transmissions within the 1900 MHz band, the VHF variety wherein most wireless providers operate. Because AMPS uses analog alerts, it cannot transmit virtual alerts and cannot transport facts packets without help from newer technology together with TDMA and CDMA.

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Question five. What Is Cdc ?

Answer :

The Connected Device Configuration (CDC) is a specification for a J2ME configuration. Conceptually, CDC offers with gadgets with greater memory and processing electricity than CLDC; it's miles for gadgets with an continually-on network connection and at the very least 2 MB of reminiscence available for the Java system.

Adv Java Interview Questions
Question 6. What Is Cdma ?

Answer :

Code-Division Multiple Access (CDMA) is a mobile technology broadly utilized in North America. There are presently 3 CDMA standards: CDMA One, CDMA2000 and W-CDMA. CDMA era uses UHF 800Mhz-1.9Ghz frequencies and bandwidth levels from 115Kbs to 2Mbps.

Question 7. What Is Cdma2000 ?

Answer :

Also referred to as IS-136, CDMA2000 is a third generation wireless era. Supports speeds ranging from 144Kbps to 2Mbps.

Adv Java Tutorial IPHONE APPS Interview Questions
Question 8. What Is Cdpd ?

Answer :

Developed by way of Nortel Networks, Cellular Digital Packet Data (CDPD) is an open general for supporting wireless Internet get right of entry to from cell gadgets. CDPD additionally supports Multicast, which lets in content companies to effectively broadcast facts to many devices on the equal time.

Question 9. What Is Chtml ?

Answer :

Compact HTML (cHTML) is a subset of HTML which is designed for small gadgets. The fundamental functions of HTML which are excluded from cHTML are: JPEG photo, Table, Image map, Multiple individual fonts and styles, Background coloration and picture, Frame and Style sheet.

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Question 10. What Is Cldc ?

Answer :

The Connected, Limited Device Configuration (CLDC) is a specification for a J2ME configuration. The CLDC is for gadgets with less than 512 KB or RAM available for the Java machine and an intermittent (restricted) network connection. It specifies a stripped-down Java virtual machine1 known as the KVM as well as several APIs for essential software services. Three applications are minimalist variations of the J2SE java.Lang, java.Io, and java.Util applications. A fourth package, javax.Microedition.Io, implements the Generic Connection Framework, a generalized API for making community connections.

IPHONE APPS Tutorial
Question 11. What Is Configuration ?

Answer :

In J2ME, a configuration defines the minimal Java runtime surroundings for a family of gadgets: the combination of a Java digital machine (both the standard J2SE digital machine or a much extra restrained model called the CLDC VM) and a center set of APIs. CDC and CLDC are configurations. See also profile, non-obligatory package.

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Question 12. What Is Cvm ?

Answer :

The Compact Virtual Machine (CVM) is an optimized Java virtual machine1 (JVM) that is used by the CDC.

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Question thirteen. What Is Deck ?

Answer :

A deck is a set of 1 or extra WML cards that can be downloaded, to a cell phone, as a unmarried entity.

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Question 14. What Is Edge ?

Answer :

Enhanced Data GSM Environment (EDGE) is a new, quicker model of GSM. EDGE is designed to guide transfer prices as much as 384Kbps and allow the transport of video and different excessive-bandwidth applications. EDGE is the result of a joint attempt between TDMA operators, companies and carriers and the GSM Alliance.

Question 15. What Is Etsi ?

Answer :

The European Telecommunications Standards Institute (ETSI) is a non-income employer that establishes telecommunications standards for Europe.

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Question sixteen. What Is Fdma ?

Answer :

Frequency-department a couple of-get admission to (FDMA) is a mechanism for sharing a radio frequency band among more than one customers with the aid of dividing it into a number of smaller bands.

Android Tutorial
Question 17. What Is Foundation Profile ?

Answer :

The Foundation Profile is a J2ME profile specification that builds on CDC. It provides additional instructions and interfaces to the CDC APIs however does now not pass to date as to specify consumer interface APIs, persistent garage, or software lifestyles cycle. Other J2ME profiles build at the CDC/Foundation mixture: as an example, the Personal Profile and the RMI Profile both construct on the Foundation Profile.

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Question 18. What Is Generic Connection Framework ?

Answer :

The Generic Connection Framework (GCF) makes it clean for wireless gadgets to make community connections. It is a part of CLDC and CDC and is living in the javax.Microedition.Io bundle.

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Question 19. What Is Gprs ?

Answer :

The General Packet Radio System (GPRS) is the next technology of GSM. It could be the basis of 3G networks in Europe and some other place.

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Question 20. What Is Gsm ?

Answer :

The Global System for Mobile Communications (GSM) is a wi-fi community machine this is extensively utilized in Europe, Asia, and Australia. GSM is used at three special frequencies: GSM900 and GSM1800 are utilized in Europe, Asia, and Australia, while GSM1900 is deployed in North America and other components of the world.

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Question 21. What Is Hlr ?

Answer :

The Home Location Register (HLR) is a database for everlasting storage of subscriber records and service profiles.

Question 22. What Is Https ?

Answer :

Hyper Text Transfer Protocol Secure sockets (HTTPS) is a protocol for transmission of encrypted hypertext over Secure Sockets Layer.

The Java Debugger (JDB) Tutorial
Question 23. What Is I-appli ?

Answer :

Sometimes referred to as "Java for i-mode", i-appli is a Java environment primarily based on CLDC. It is used on handsets in NTT DoCoMo's i-mode provider. While i-appli is just like MIDP, it become developed earlier than the MIDP specification became finished and the 2 APIs are incompatible.

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Question 24. What Is Ide ?

Answer :

An Integrated Development Environment (IDE) affords a programming environment as a unmarried software. IDEs generally package a compiler, debugger, and GUI builder tog ether. Forte for Java is Sun's Java IDE.

IPHONE APPS Interview Questions
Question 25. What Is Iden ?

Answer :

The Integrated Dispatch Enhanced Network (iDEN) is a wi-fi community gadget advanced by Motorola. Various vendors guide iDEN networks around the sector: Nextel is one of the most important providers, with networks covering North and South America.

Question 26. What Is I-mode ?

Answer :

A wellknown utilized by Japanese wi-fi devices to get entry to cHTML (compact HTML) Web websites and display animated GIFs and other multimedia content.

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Question 27. What Is 3g ?

Answer :

Third generation (3G) wi-fi networks will provide quicker records transfer prices than modern-day networks. The first technology of wi-fi (1G) turned into analog cell. The 2nd era (2G) is digital mobile, proposing integrated voice and information communications. So-referred to as 2.5G networks offer incremental speed increases. 3G networks will offer dramatically advanced records transfer costs, enabling new wireless packages including streaming media.

BLACKBERRY Interview Questions
Question 28. What Is 3gpp ?

Answer :

The third Generation Partnership Project (3GPP) is a worldwide collaboration between 6 partners: ARIB, CWTS, ETSI, T1, TTA, and TTC. The group targets to increase a globally normal third-generation cellular machine primarily based on GSM.

Question 29. What Is Java Card ?

Answer :

The Java Card specification lets in Java era to run on clever playing cards and other small gadgets. The Java Card API is compatible with formal worldwide standards, such as, ISO7816, and enterprise-specific standards, such as, Europay/Master Card/Visa (EMV).

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Question 30. What Is Javahq ?

Answer :

JavaHQ is the Java platform control middle in your Palm OS device.

Question 31. What Is Jcp ?

Answer :

The Java Community Process (JCP) an open organisation of global Java developers and licensees who increase and revise Java generation specs, reference implementations, and era compatibility kits thru a formal manner.

Question 32. What Is Jdbc For Cdc/fp ?

Answer :

The JDBC Optional Package for CDC/Foundation Profile (JDBCOP for CDC/FP) is an API that allows mobile Java programs to talk with relational database servers using a subset of J2SE's Java Database Connectivity. This non-compulsory bundle is a strict subset of JDBC three.Zero that excludes a number of JDBC's advanced and server-orientated features, along with pooled connections and array sorts. It's intended to be used with the Foundation Profile or its supersets.

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Question 33. What Is Jsr ?

Answer :

Java Specification Request (JSR) is the actual description of proposed and very last specs for the Java platform. JSRs are reviewed via the JCP and the general public before a final launch of a specification is made.

Android Interview Questions
Question 34. What Is Kittyhawk?

Answer :

KittyHawk is a fixed of APIs used by LG Telecom on its IBook and p520 devices. KittyHawk is based on CLDC. It is conceptually much like MIDP however the two APIs are incompatible.

Question 35. What Is Kjava?

Answer :

KJava is an old term for J2ME. It comes from an early bundle of Java software for PalmOS, launched on the 2000 JavaOne display. The training for that launch were packaged inside the com.Sun.Kjava bundle.

Question 36. What Is Ksoap ?

Answer :

kSOAP is a SOAP API appropriate for the J2ME, based on kXML.

Mobile Testing Interview Questions
Question 37. What Is Kxml?

Answer :

The kXML undertaking affords a small footprint XML parser that may be used with J2ME.

Question 38. What Is Kvm?

Answer :

The KVM is a compact Java virtual gadget (JVM) that is designed for small gadgets. It helps a subset of the functions of the JVM. For instance, the KVM does no longer help floating-point operations and item finalization. The CLDC specifies use of the KVM. According to folklore, the 'K' in KVM stands for kilobyte, signifying that the KVM runs in kilobytes of memory rather than megabytes.

Question 39. What Is Lan?

Answer :

A Local Area Network (LAN) is a collection of gadgets linked with various communications technology in a small geographic location. Ethernet is the most widely-used LAN era. Communication on a LAN can both be with Peer-to-Peer devices or Client-Server gadgets.

Question 40. What Is Lcdui ?

Answer :

LCDUI is a shorthand manner of regarding the MIDP user interface APIs, contained in the javax.Microedition.Lcdui package deal. Strictly speaking, LCDUI stands for Liquid Crystal Display User Interface. It's a person interface toolkit for small tool screens that are usually LCD displays.

BREW (Binary Runtime Environment for Wireless) Interview Questions
Question forty one. What Is Mexe?

Answer :

The Mobile Execution Environment (MExE) is a specification created by way of the 3GPP which information an applicatio n surroundings for next era cell devices. MExE includes a selection of technologies together with WAP, J2ME, CLDC and MIDP.

Question 42. What Is Midlet ?

Answer :

A MIDlet is an software written for MIDP. MIDlet applications are subclasses of the javax. Microedition. Midlet .MIDlet elegance that is defined with the aid of MIDP.

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Question forty three. What Is Midlet Suite?

Answer :

MIDlets are packaged and dispensed as MIDlet suites. A MIDlet suite can comprise one or greater MIDlets. The MIDlet suite includes  files, an application descriptor file with a .Jad extension and an archive report with a .Jar record. The descriptor lists the archive document name, the names and class names for every MIDlet within the suite, and other statistics. The archive document consists of the MIDlet instructions and useful resource files.

Question 44. What Is Midp?

Answer :

The Mobile Information Device Profile (MIDP) is a specification for a J2ME profile. It is layered on pinnacle of CLDC and adds APIs for utility existence cycle, consumer interface, networking, and persistent garage.

Question forty five. What Is Midp-ng?

Answer :

The Next Generation MIDP specification is presently below development by the Java Community Process. Planned enhancements include XML parsing and cryptographic assist.

Question forty six. What Is Mobitex?

Answer :

Mobitex is a packet-switched, narrowband PCS community, designed for huge-area wi-fi data communications. It become developed in 1984 with the aid of Eritel, an Ericsson subsidiary, a nd there are actually over 30 Mobitex networks in operation worldwide.

Question 47. What Is Modulation ?

Answer :

Modulation is the technique by means of which a excessive-frequency virtual sign is grafted onto a decrease-frequency analog wave, so that virtual packets are capable of trip piggyback at the analog airwave.

Question forty eight. What Is Msc ?

Answer :

A Mobile Switching Center (MSC) is a unit inside a cell smartphone network that routinely coordinates and switches calls in a given cell. It monitors every caller's sign strength, and whilst a sign starts to fade, it palms off the call to every other MSC that is better located to control the decision.

Question 49. What Is Obfuscation?

Answer :

Obfuscation is a technique used to complicate code. Obfuscation makes code more difficult to recognize whilst it's far de-compiled, but it normally has no have an effect on at the capability of the code. Obfuscation applications may be used to defend Java applications with the aid of making them tougher to opposite-engineer.

Question 50. What Is Optional Package?

Answer :

An elective bundle is a set of J2ME APIs offering offerings in a particular vicinity, which includes database get right of entry to or multimedia. Unlike a profile, it does no longer define a whole software environment, however as a substitute is used at the side of a configuration or a profile. It extends the runtime environment to aid tool skills that are not accepted enough to be described as part of a profile or that want to be shared with the aid of unique profiles. J2ME RMI and the Mobile Media RMI are examples of non-obligatory packages.

Question 51. What Is Ota ?

Answer :

Over The Air (OTA) refers to any wireless networking era.

Question fifty two. What Is Pcs ?

Answer :

Personal Communications Service (PCS) is a suite of second-era, digitally modulated cellular-
communications interfaces that includes TDMA, CDMA, and GSM. PCS serves as an umbrella time period for 2d-
generation wi-fi technologies working within the 1900MHz variety.

Question 53. What Is Pdap?

Answer :

The Personal Digital Assistant Profile (PDAP) is a J2ME profile specification designed for small systems which include PalmOS gadgets. You can think of PDAs as being larger than cell telephones however smaller than set-pinnacle bins. PDAP is constructed on pinnacle of CLDC and could specify user interface and persistent storage APIs. PDAP is presently being developed the use of the Java Community Process (JCP).

Question 54. What Is Pdc ?

Answer :

Personal Digital Cellular (PDC) is a Japanese general for wi-fi communications.

Question fifty five. What Is Pdcp?

Answer :

Parallel and Distributed Computing Practices (PDCP) are regularly used to explain pc systems which are unfold over many gadgets on a network (stressed out or wi-fi) wherein many nodes procedure data simultaneously.

Question fifty six. What Is Personal Profile?

Answer :

The Personal Profile is a J2ME profile specification. Layered at the Foundation Profile and CDC, the Personal Profile might be the subsequent generation of PersonalJava technology. The specification is currently in development underneath the Java Community Process (JCP).

Question fifty seven. What Is Personaljava?

Answer :

PersonalJava is a Java environment based totally on the Java virtual machine1 (JVM) and a set of APIs much like a JDK 1.1 environment. It includes the Touchable Look and Feel (also known as Truffle), a picture toolkit this is optimized for consumer devices with a touch touchy display. PersonalJava could be protected in J2ME in the upcoming Personal Profile, that is constructed on CDC.

Question fifty eight. What Is Png?

Answer :

Portable Network Graphics (PNG) is an picture format supplying lossless compression and storage flexibility. The MIDP specification calls for implementations to apprehend positive varieties of PNG images.

Question 59. What Is Pose?

Answer :

Palm OS Emulator (POSE).

Question 60. What Is Prc?

Answer :

Palm Resource Code (PRC) is the file format for Palm OS packages.

Question sixty one. What Is Preverification?

Answer :

Due to memory and processing energy to be had on a device, the verification process of classes are break up into  techniques. The first procedure is the preverification that's off-tool and achieved the usage of the preverify device. The 2d manner is verification that's executed on-tool.

Question sixty two. What Is Profile?

Answer :

A profile is a set of APIs brought to a configuration to support precise makes use of of a cellular device. Along with its underlying configuration, a profile defines a complete, and normally self-contained, standard-purpose application surroundings. Profiles frequently, but not continually, define APIs for consumer interface and patience; the MIDP profile, based totally at the CLDC configuration, fits this sample. Profiles may be supersets or subsets of different profiles; the Personal Basis Profile is a subset of the Personal Profile and a superset of the Foundation Profile. See also configuration, optional package deal.

Question 63. What Is Provisioning ?

Answer :

In telecommunications terms, provisioning manner to offer telecommunications offerings to a person. This includes providing all important hardware, software, and wiring or transmission devices.

Question sixty four. What Is Pstn ?

Answer :

The public service smartphone network (PSTN) is the traditional, land-line primarily based device for exchanging telephone calls.

Question sixty five. What Is Rmi?

Answer :

Remote technique invocation (RMI) is a characteristic of J2SE that enables Java objects jogging in one digital machine to invoke techniques of Java items going for walks in some other digital system, seamlessly.

Question sixty six. What Is Rmi Op?

Answer :

The RMI Optional Package (RMI OP) is a subset of J2SE 1.3's RMI functionality used in CDC-based profiles that include the Foundation Profile, together with the Personal Basis Profile and the Personal Profile. The RMIOP cannot be used with CLDC-based totally profiles due to the fact they lack object serialization and different vital functions located simplest in CDC-based profiles. RMIOP supports maximum of the J2SE RMI functionality, inclusive of the Java Remote Method Protocol, marshalled gadgets, disbursed rubbish series, registry-based object research, and community class loading, however not HTTP tunneling or the Java 1.1 stub protocol.

Question sixty seven. What Is Rmi Profile?

Answer :

The RMI Profile is a J2ME profile specification designed to help Java's Remote Method Invocation (RMI) allotted object gadget. Devices enforcing the RMI Profile will be capable of interoperate via RMI with different Java devices, including Java 2, Standard Edition. The RMI Profile is based totally at the Foundation Profile, which in flip is primarily based on CDC.

Question sixty eight. What Is Rms?

Answer :

The Record Management System (RMS) is a simple file-orientated database that allows a MIDlet to constantly save information and retrieve it later. Different MIDlets can also use the RMS to share information.

Question 69. What Is Sdk?

Answer :

A Software Development Kit (SDK) is a hard and fast of equipment used to increase programs for a particular platform. An SDK typically consists of a compiler, linker, and debugger. It may additionally include libraries and documentation for APIs.

Question 70. What Is Sim?

Answer :

A Subscriber Identity Module (SIM) is a stripped-down clever card containing facts about the identity of a cellular-telephone subscriber, and subscriber authentication and carrier statistics. Because the SIM uniquely identifies the subscriber and is portable amongst handsets, the consumer can flow it from one type of smartphone to every other, facilitating global roaming.

Question seventy one. What Is Sms?

Answer :

Short Message Service (SMS) is a factor-to-factor provider similar to paging for sending text messages of as much as a hundred and sixty characters to mobile telephones.

Question 72. What Is Soap?

Answer :

The Simple Object Access Protocol (SOAP) is an XML- based totally protocol that allows items of any type to communicated in a allotted surroundings. SOAP is used in growing Web Services.

Question seventy three. What Is Ssl?

Answer :

Secure Sockets Layer (SSL) is a socket protocol that encrypts information sent over the community and affords authentication for the socket endpoints.

Question seventy four. What Is T9?

Answer :

T9 is a text enter approach for mobile telephones and other small devices. It replaces the "multi-faucet" input technique through guessing the phrase that you are trying to go into. T9 can be embedded in a device with the aid of the manufacturer. Note that even if the tool supports T9, the Java implementation may or may not use it. Check your documentation for information.

Question 75. What Is Tdma?

Answer :

Time Division Multiple Access (TDMA) is a 2d-generation modulation fashionable the use of bandwidth allocated in the 800 MHz, 900 MHz, and 1900MHz levels.

Question seventy six. What Is Telematics?

Answer :

Telematics is a place-based provider that routes event notification and manage information over wireless networks to and from cellular devices set up in automobiles. Telematics uses GPS era to tune car latitude and longitude, and shows maps in LED consoles mounted in dashboards. It connects to remote processing facilities that turn offer server-aspect Internet and voice offerings, as well as get admission to to database assets.

Question seventy seven. What Is Tomcat ?

Answer :

Tomcat is a reference implementation of the Java servlet and JavaServer Pages (JSP) specifications. It is intended as a platform for developing and trying out servlets.

Question 78. What Is Uddi ?

Answer :

Universal Description, Discovery, and Integration (UDDI) is an XML-primarily based fashionable for describing, publishing, and locating Web services. UDDI is a specification for a allotted registry of Web offerings.

Question seventy nine. What Is Umts?

Answer :

Developed by means of Nortel Networks, Universal Mobile Telecommunications Service (UMTS) is a fashionable with a view to offer cell customers a steady set of technologies irrespective of where they may be positioned international. UMTS utilizes W-CDMA generation.

Question 80. What Is Vlr?

Answer :

The Visitor Location Register (VLR) is a database that carries temporary information approximately subscribers.

Question 81. What Is Wae?

Answer :

The Wireless Application Environment (WAE) provides a utility framework for small gadgets. WAE leverages different technology which include WAP, WTP, and WSP.

Question eighty two. What Is Wap?

Answer :

Wireless Application Protocol (WAP) is a protocol for transmitting data among servers and clients (commonly small wi-fi devices like cellular phones). WAP is similar to HTTP within the World Wide Web. Many mobile phones consist of WAP browser software to allow customers access to Internet WAP sites.

Question eighty three. What Is Wap Gateway?

Answer :

A WAP Gateway acts as a bridge allowing WAP gadgets to communicate with different networks (particularly the Internet).

Question eighty four. What Is W-cdma?

Answer :

Wideband Code-Division Multiple Access (W-CDMA), additionally known as IMT-2000, is a third technology wi-fi generation. Supports hastens to 384Kbps on a extensive-location community, or 2Mbps locally.

Question eighty five. What Is Wdp?

Answer :

Wireless Datagram Protocol (WDP) works as the delivery layer of WAP. WDP techniques datagrams from top layers to codecs required via exceptional physical datapaths, bearers, that may be as an example GSM SMS or CDMA Packet Data. WDP is customized to the bearers available inside the tool so top layers don't want to care about the physical degree.

Question 86. What Is Wma ?

Answer :

The Wireless Messaging API (WMA) is a set of classes for sending and receiving Short Message Service messages. See also SMS.

Question 87. What Is Wml?

Answer :

The Wireless Markup Language (WML) is a simple language used to create programs for small wireless devices like cell telephones. WML has similarities to HTML in the World Wide Web.

Question 88. What Is Wmlscript?

Answer :

WMLScript is a subset of the JavaScript scripting language designed as a part of the WAP popular to provide a convenient mechanism to get right of entry to cell telephone's peripheral functions.

Question 89. What Is Wsp?

Answer :

Wireless Session Protocol (WSP) implements consultation offerings of WAP. Sessions may be connection-oriented and connectionless and they may be suspended and resumed at will.

Question 90. What Is Wtls?

Answer :

Wireless Transport Layer Security protocal (WTLS) does all cryptography oriented features of WAP. WTLS handles encryption/decryption, consumer authentication and facts integrity. WTLS is based totally on the constant network Transport Layer Security protocal (TLS), previously called Secure Sockets Layer (SSL).

Question 91. What Is Wtp?

Answer :

Wireless Transaction Protocol (WTP) is WAP's transaction protocol that works among the session protocol WSP and security protocol WTLS. WTP chops records packets into decrease degree datagrams and concatenates received datagrams into beneficial statistics. WTP also continues song of received and sent packets and does re-transmissions and acknowledgment sending when needed.

Question ninety two. What Is Derived From ?

Answer :

Class X is "derived from" class Y if elegance X extends elegance Y. See additionally subclass, superclass.




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