Android interview questions for freshers/beginners

1.what is an android?

An Android is a Linux-based operating system designed for smartphones and tablets for efficient memory management and long battery life.

2.when and who founded the Android corporation?
In Oct 2003 four persons Andy Rubin,  Rich Miner, Chris White and Nick Sears established Android incorporation
.
3.When Google acquired Andriod Corporation?
17th August 2005.

4.what is the aim behind developing Android?

The aim behind developing Android are as follow:-
a.battery life.

b. Fast processing(time management).

5.when was Android publically comes into existence?

on 5th November 2007 android publically comes into existence.

6.when and who launched the first Android phone?
The first Android OS phone was launched on 22nd October 2008 by Tmobile named G1.

7.what is openhandset allainace?

Google, Tmobile, Qualcomm, Motorola, hTc and other members founded Open Handset Alliance to promote and sponsor Linux based Android Mobile phones.

8.Latest version of android?

Nougat

9.list versions of android?

Nougat

Marshmallow

Lollipop

Androrid 4.4 kitkat

android 4.1_4.3 jelly beans

android 4.0_4.0.4 ice cream sandwich

android 3.0-3.2.6 honeycomb

android 2.3-2.3.7 gingerbread

android 2.2_2.2.3 froyo

android 2.0-2.1 eclair

android 1.6 donut

android 1.5 cupcake

android1.0 first version of android

10.what are the reasons behind using linux based operating system?

The basic reasons are as follows:-

a.To save battery life.

b.portability.

c.security.

d.open source.

11.what are the key components of android architecture?

The key components are as follows:-

a.Linux kernel

b.native API

c.Application framework

d.application

12.why linux kernel is known as heart of linux?

Kernel is not an operating system it enables system that enables the applications that make the real OS able to operate.such applications contains compiler,shells ,software etc.

13.explain .native API?

Native API stand for native application programming interface.It provides inbuilt library.

14.What is dvm?

Dvm stands for dalvik virtual machine(Dalvik is a place in ireland).

It is a process virtual machine in androids OS that runs the applications on android devices.

15.who was the founder of DVM?

Dan boustein was the founder of DVM.

who is responsible for time management in android?

Linux and DVM both are responsible for time management.

16.where is the layout details placed?

layout details are placed in xml files because of Stndard setting gui definition format.

17.what is AIDL?

AIDL stands for android interface definition language.
It handles interface between a client and a service to communicate at the same levelthrough interprocess communication.

18.which dailogbox are supported by android?

AlertDailog.

ProcessDailog.

datepickerDailog.

timepickerDailog.

19.can an application be started on powerup?

yes

20.does andorid support bluetooth serial profile?

yes

21.can we run more than one application on android at at same time?

Yes, using a multi-touch feature that supports Lollipop and higher versions.