Soumi's Herbal Products Interview Questions and Answers

The app lifecycle includes states like running in the background, onStop, and onRestart.

• App running in the background: When the app is not visible but still running, it is in the background state.

• onStop state: Occurs when the activity is no longer visible to the user.

• onRestart state: Follows onStop and is called when the activity is being re-displayed to the user.

There are multiple ways to share data between apps, including using intents, content providers, broadcast receivers, and shared preferences.

• Using Intents: Allows apps to send and receive data through an Intent object.

• Content Providers: Enable apps to share data with other apps by exposing a structured set of data through a URI.

• Broadcast Receivers: Apps can send broadcasts to other apps to share data or events.

• Shared Preferences: Apps can store and retrieve key-value pairs to ...read more

Background tasks in Android can be performed using services, AsyncTask, JobScheduler, or WorkManager.

• Use Services for long-running tasks in the background

• AsyncTask for short background tasks that need to interact with the UI

• JobScheduler for deferrable background tasks that require network connectivity

• WorkManager for tasks that need to run reliably across different Android versions

AIDL stands for Android Interface Definition Language, used for inter-process communication in Android development.

• AIDL is a tool used to define the programming interface that clients and servers use to communicate with each other in Android.

• It allows different Android components to communicate with each other across different processes.

• AIDL files define the methods that can be called remotely, along with the data types that can be passed.

Threads are independent sequences of execution within a process, while coroutines are cooperative routines that can pause and resume.

• Threads are managed by the operating system, while coroutines are managed by the programmer.

• Threads run concurrently and can execute in parallel on multiple cores, while coroutines are typically single-threaded.

• Threads have their own stack and memory space, while coroutines share the same stack and memory space.

• Threads are preemptive, meaning th...read more

A service is a piece of code that performs specific tasks or functions to support the overall functionality of a software application.

• Services are often used for tasks such as data processing, communication with external systems, or background tasks.

• Examples of services include web services, REST APIs, and microservices.

• Services can run independently of the user interface and can be accessed by multiple components within an application.

Intersection of two linked lists is finding the common node(s) between them.

• Traverse both lists and compare each node to find the common node(s).

• Use a hash table to store the nodes of one list and check for their presence in the other list.

• Calculate the length of both lists and move the pointer of the longer list to match the length of the shorter list, then compare each node.