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120-Android-Interview-Qestions-For-2022
Appdevnotes.com
Q27 : What is a handler typically used for? A27 : You use Handler to communicate between threads, most commonly to pass an action from a background thread to Android’s main thread. Q28 : What is the difference between onCreate() and onStart()? A28 : The onCreate() method is called once during the Activity lifecycle, either when the application starts, or when the Activity has been destroyed and then recreated. The onStart() method is called whenever the Activity becomes visible to the user. Q29 : What data types supported by AIDL? A29 : String, List, Map, charSequence and more… Q30 : What is AndroidManifest.xml file? A30 : AndroidManifest.xml file contains information about the app and provides the same to the android system. Q31 : What are the dialog boxes supported in android ? A31 : Alert Dialog, Progress Dialog, DatePickerDialog, and TimePickerDialog are supported. Q32 : What is the difference between a fragment and an activity? A32 : An activity is a single focused operation that a user can perform such as (dial a number, take a picture, send an email and …) A fragment is a modular section of an activity with its own lifecycle and input events, and which can be added or removed as well. Q33 : What are “sensors” in android? A33 : Android-based devices have a collection of built-in sensors in them, which measure certain parameters like motion, orientation, and many more through their high accuracy. Q34 : What are the troubleshooting techniques you can follow if an application is crashing frequently? A34 : Compatibility check and Memory management can be used in such a cases. Download 1.75 Mb. Do'stlaringiz bilan baham: |
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