Technology Questions

The JDBC Driver provides vendor-specific implementations of the abstract classes provided by the JDBC API. This driver is used to connect to the database.

These are accessibility modifiers. Private is the most restrictive, while public is the least restrictive. There is no real difference between protected and the default type (also known as package protected) within the context of the same package, however the protected keyword allows visibility to a derived class in a different package.

Intents are created to define an action that we want to perform and the launches the appropriate activity from another application.

Code

        Intent intent = new Intent(Intent.ACTION_SEND);

        intent.putExtra(Intent.EXTRA_EMAIL, recipientArray);

        startActivity(intent);

Oracle database comprises of three kinds of files:
- Datafiles
- Redo log files
- Control files

- A web worker is a JavaScript which runs in the background. It exists in external files. 

 - It is independent of other scripts and does not affect the performance of the page. 

 - Web workers are usually used for CPU intensive tasks.

Transmission is a physical movement of information and concern issues like bit polarity, synchronization, clock etc.

Communication means the meaning full exchange of information between two communication media

Web browser is a software application used to locate,retrieve and display content on the World Wide Web, including Web pages, images, videos and other files.

Examples : Microsoft Internet Expiorer , Mozilla Firefox , Google Chrome, Opers , Safari etc...

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.