Mobile programing

Question 1

What is mobile programming and what are the types of mobile programming?

Answer 1

Mobile programming means building/developing software applications that run on mobile devices. There are two types, each is defined by the OS the resulting application is run on.

For Native Application Development: The resulting application will run on a specific mobile operating system

For Cross-platform Application Development: The resulting applications will run on multiple mobile operation system

Question 2

What is a state?

Answer 2

A state is a set of current conditions that define the characteristics and behaviors of processes, services, and activities.

Question 3

What are the 4 states a process can have?

Answer 3

1. Running state: The process is in execution
2. Sleeping: The process is waiting for an event before beginning execution.
3. Zombie: The process has completed execution but the memory it occupied has not been freed.
4. Dead: The process has completed execution and the memory it occupied has been freed

Question 4

What are the 4 states an activity can have?

Answer 4

1. Created: The activity has been created but has not yet started
2. Started: The activity has started and is now visible to the user
3. Paused: The activity is no longer visible to the user but is still in memory
4. Stopped: The activity is no longer visible to the user and is no longer in memory

Question 5

What are the different loops involved in monitoring an activity?

Answer 5

1. The activity lifecycle loop: creating, starting, pausing, and stopping activities
2. The service lifecycle loop: creating, starting, and stopping services
3. The Broadcast receiver lifecycle loop: receiving and processing broadcast messages

Question 6

When is a foreground activity killed?

Answer 6

Then the system needs to free memory or resources

Question 7

What is the difference between a foreground service and a background service?

Answer 7

Foreground services run in the foreground and provide notifications to users, while background services run in the background and do not provide notifications to the user

Question 8

What is an intent?

Answer 8

It is a message that allows components to communicate with each other.