What is the TTL (Time to Live)? Why is it required?

Correct Answer: AlertDialog : An alert dialog box supports 0 to 3 buttons and a list of selectable elements, including check boxes and radio buttons Among the other dialog boxes, the most suggested dialog box is the alert dialog box ProgressDialog: This dialog box displays a progress wheel or a progress bar It is an extension of AlertDialog and supports adding buttons DatePickerDialog: This dialog box is used for selecting a date by the user TimePickerDialog: This dialog box is used for selecting time by the user

Correct Answer: Android is a stack of software for mobile devices which has Operating System, middleware and some key applications The application executes within its own process and its own instance of Dalvik Virtual Machine Many Virtual Machines run efficiently by a DVM device DVM executes Java language?s byte code which later transforms into dex format files Features of Android : - Components can be reused and replaced by the application framework - Optimized DVM for mobile devices - SQLite enables to store the data in a structured manner - Supports GSM telephone and Bluetooth, WiFi, 3G and EDGE technologies - The development is a combination of a device emulator, debugging tools, memory profiling and plug-in for Eclipse IDE

Correct Answer: Multiple choice list can be viewed by making the CheckBox android:id value be ?@android:id /text1" That is the ID used by Android for the CheckedTextView in simple_list_item_multiple_choice

Correct Answer: Android Application Architecture has the following components: * Services ? like Network Operation * Intent - To perform inter-communication between activities or services * Resource Externalization - such as strings and graphics * Notification signaling users - light, sound, icon, notification, dialog etc * Content Providers - They share data between applications

Correct Answer: Tags

Explanation:

HTML language is a set of markup tags. The code used to specify the formatting are called tags. Markup languages are designed for the processing, definition and presentation of text. The language specifies code for formatting, both the layout and style, within a text file. 

 

HTML is an example of a markup language to improve the appearance of, and link text with data on the internet.

Correct Answer: The compatibility is defined in terms of android compatible devices that run any application This application is written by third party developers using the Android platform that comes in the form of SDK and NDK There are many filters that are used to separate devices that are there to participate in the compatibility mode for the Android applications The devices that are compatible require the android to approve it for their trademark The devices that are not passes the compatibility are just given in the Android source code and can use the android trademark The compatibility is a way through which the user can participate in the Android application platform The source code is free to use and it can be used by anyone

Correct Answer: There is the demand for the rich multimedia that involves many features that are used till now to make the Android market more popular in all the phases The application includes the following: ? Mixable audio effects ? developer can easily create audio environments using the API key that is provided with it like creating equalization, bass boost, headphone feature, etc The android provide the tools that can be used to mix the audio effects and apply it ? There is also support for new media formats like VP8 open video compression format that uses a container format that can run on all the platforms and add the support for AAC and AMR encoding The applications provided allow higher quality video to be captured ? The application allows the access to multiple cameras that allows the use of APIs to include the camera and its properties in one The platform provides the application to include the camera with high and low resolution

Correct Answer: There are two modes of operations that are necessary to run depending on the value returned by the startcommand() The modes are as follows: - START_STICKY: this mode is used for the services that are explicitly started and stopped according to the need and the requirement of the user - START_NOT_STICKY or START_REDELIEVER_INTENT: this service mode is used for services that are running only when the processing command sent to them That means these run on the basis of the command that is passed to them by giving the instruction of execution - Clients uses the ContextbindService() that is used to get the persistent connection for a service To create a service that is not already running the command onCreate is used

Correct Answer: The status of an activity can be start and stop only The start means the activity is up and running It is in execution state and performing some actions Whereas the stop state defines that the activity is being stopped and performing no action on the system To see or check the status of an activity there is a command that has to be used like NEW_TASK_LAUNCH flag that keeps the track of all the activities that are running and the main command under which the flag resides is given as startActivity() call To bring the activity stack in front of the process that is already running require the command mentioned above to be used The activity can be started remotely by using the remote services These services allow easy interaction with the client and provide the sample to show it on the local server

Correct Answer: Android uses many security measures to keep them away from the hackers They have designed by making changes to the devices or installing a software service on the mobile Android application uses sandbox that is very popular and allow limited access to the information that is very private and sensitive for the user It allows the permissions to be set for the use of the information The security measures that are provided by android is the use of the encryption of the messages that allow user to remain without worry about there phone security They also consists of user terms and agreements that also taken care of Most of the time android doesn't allow other applications to run on their system but it can be done by using different resources that are available on-line As, android is open source it is not fully secure but lots of security issues are being solved for make it more popular and bug free