Let us understand the concepts of Amazon Drive and Ubuntu One before learning the differences between them.Ubuntu OneIt provides a collection of software that consists of applications like file manager, PDF viewer, text editor, video player, and archiving utility by default. The system is launched by a UK based company called Canonical LtdFeaturesThe features of Ubuntu One are as follows −Backslashes are used in Ubuntu like /home/name.Ubuntu doesn’t have drive letters.Ubuntu applications don’t lock exclusive access to files as often.Just as every mounted file system is a directory under / (the root directory), everything on Ubuntu is a file.Ubuntu has ... Read More

Let us understand the concept of Viber and Whatsapp messenger.ViberIt allows users to send multiple images and videos at a time. One can also block another user. It also has a cross platform typing indicator. One can send longer video messages which will be up to 3 minutes long.Selecting the option of receiving the video calls with video, the app will automatically open the front camera for the conversation.User-Experience for the Viber application is as follows −If we sum up the negative and positive experiences, more than average users are happy with this application.According to them, it is so simple ... Read More

Let us understand the concepts of FDMA and CDMA before learning the differences between them.FDMA (frequency division multiple access)It is the division of the frequency band allocated for wireless cellular telephone communication into 30 channels, each of which can carry a voice conversation or, with digital service, carry digital data.FDMA is a basic technology in the Analog Advanced Mobile Phone Service (AMPS). In FDMA synchronization bits are not needed for continuous transmission. FDMA needs Tight filtering for minimizing interference. When the channel is not in use then FDMA will be in idle state.Code-division multiple access (CDMA)It is an example of ... Read More

Mobile security, or cell phone security, has turned out to be progressively imperative in portable computing. Of specific concern is the security of individual and business data now put away on cell phones.ThreatsA cell phone client is presented to different dangers when they utilize their phone. The dangers can disturb the operation of the cell phone, and transmit or change client data. So applications must ensure security and honesty of the data they handle.In expansion, since some applications could themselves be malware, their usefulness and exercises ought to be constrained.For instance, limiting the application from getting to area data by ... Read More

A real-time system means the system is subjected to real-time that means the response should be guaranteed within a specified timing constraint or system should meet the specified deadline.For example − Flight control system, real-time monitors etc.Features of Real-time SystemThe features of real-time system are as follows −Reliability − The system can operate for a long time without any interfere of the humanManageability − In a real-time system the cost of implementation is to be reduced.Performance − The system should be designed for the purpose of working easier and the workload should be reduced.Predictability − Within the given time, the actions ... Read More

WhatsApp is an instant messaging platform, designed to make communication quick and easy. It is designed for a mobile and web version - that means the conversations can be managed on multiple devices, a feature that is valued highly by users.It displays read and delivery confirmation, as well providing users with the option to create group chats and make voice calls. It is the world's most popular messaging app, with around 1.5 billion active users. It is available for Android and other smartphones absolutely free unless we are not exceed our daily data limit.Facebook Messenger is a standalone app operated ... Read More

WhatsApp and Telegram are called instant messaging platforms, designed to make communication quick and easy. Both apps are designed for a mobile and web version - that means the conversations can be managed on multiple devices, a feature that is valued highly by users.Both apps display read and delivery confirmation, as well providing users with the option to create group chats and make voice calls.DifferencesThe major differences between Telegram and WhatsApp are as follows −TelegramWhatsAppIt was launched in 2013It was launched in 2009In telegram we can do file sharing up to 1.5GBWhatsApp allows file sharing only 16MB.In one telegram group ... Read More

In this article, we will see how to find the number of repeated values in a Kotlin list.Example – Finding Repeated Values Using groupingBy()The Kotlin library provides an inline function called groupingBy() which creates a grouping source from an array to be used later with one of the group-and-fold operations using the specified keySelector function to extract a key from each element.The function declaration of groupingBy() looks like this −inline fun Array.groupingBy(    crossinline keySelector: (T) -> K ): GroupingIn this example, we will create a list of values and implement groupingBy() in the list.fun main(args: Array) {   ... Read More

A Mutable List is an interface and generic collection of elements. Once a collection is declared as mutable, it becomes dynamic and we can modify its data as per requirement. A mutable list grows automatically in size as we insert new elements into it. The Mutable List inherits form the Generic class.Example – Creating a Mutable List in KotlinIn order to create a mutable list of repeating elements, we will be using Kotlin List(). By definition, it looks like this−inline fun List(    size: Int,    init: (index: Int) -> T ): ListAs we pass an initial default value, ... Read More

The concept of exception in Kotlin is very much same as it is in Java. All the exceptions in Kotlin are the descendants of the Throwable class. @Throws annotation indicates what exceptions should be declared by a function when compiled to a JVM method.Example – Throwing exception using a methodIn this example, we will create a scenario where we will generate a logical arithmetic exception, but we will try to throw a different exception using the @throws annotation and a function call.import java.io.* import kotlin.jvm.Throws fun main(args: Array) {    val item=0    var result=0    try {   ... Read More