Android Interview Questions and Answers, Android Multiple choice pdf for Freshers and experienced. Frequently asked Android Interview Questions with detailed answers and examples. Tips and Tricks for cracking Android interview. Happy job hunting. Android Interview Questions-Interview Questions and Answers Page 1 of 7 scretch.info
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Here is a list of 50 important Android Operating system interview questions with their scretch.infod is the most popular operating system used in mobile. you google something like “android interview questions” the same set is always returned. experience with them and be able to design its own solutions. Google, making the Android experience sleeker by the day. Are Android phones called "Droids"? A. Not necessarily. "Droid" is a brand name used by.
Is the latest Android operating system supported in all mobile phones? The supporting facility of Android new version depends on the capabilities and specs of the phone. There are few Android power phones that allow the user to update their version to the higher operating version. Either the new feature will not be supported, or the performance of the operating device will slow down. What is a marshmallow in Android?
In the coming 10 years, desktops will be replaced completely with mobile, and then all the applications will be designed mainly for mobile. The demand for mobile based trained engineers are increasing every year. Now after the launch of ipad by Apple, it will be even more. Therefore; the gextgen technology will be nothing else than mobile. The demand is expected to grow 70 folds in the coming 4 years. What Is A Dalvik? The name of Androids virtual machine. The virtual machine is register-based, and it can run classes compiled by a Java language compiler that have been transformed into its native format using the included?
The VM runs on top of Posix-compliant operating systems, which it relies on for underlying functionality such as threading and low level memory management.
The Dalvik core class library is intended to provide a familiar development base for those used to programming with Java Standard Edition, but it is geared specifically to the needs of a small mobile device. Generally, it's very difficult to detail them, unless there is a significant new feature in which case, that will be very well advertised!
Usually it's minor speed improvements, bug fixes etc No time soon. Folks are working on it, but you'll need a lot of patience before it if ever arrives.
This is a known annoyance on some devices, believed to be related to power management switching the speaker on and off not confirmed , it actually seems worse in silent mode ironically. If you experience this, you're not alone When a fix is ready, it will be announced here. Google doesn't take a dime out of this.
Explain Seapine Software? Seapine's software development and testing tools streamline your development process, saving you significant time and money. Enjoy feature-rich tools that are flexible enough to work in any software development environment. With Seapine integrated tools, every step in the developmentprocess feeds critical information into the next step, letting you focus on developing high quality software in less time. Clicking on the active text box will pop up the software keyboard but this will resize the list, removing focus from the clicked element.
An open platform would foster faster innovation, multiple software versions, better customisation options, lower costs, which would bring down the overall service and handset costs while boostingsales.
Imagine a situation that you are in a country where no one understands the language you speak and you can not read or write. However, you have mobile phone with you.
With a mobile phone with android, the Google translator translates the data of one language into another language by using XMPP to transmit data. You can type the message in English and select the language which is understood by the citizens of the country in order to reach the message to the citizens. Developers will be able innovate rapidly because they will have comprehensive API access tohandset capabilities that are web-ready. They will experience increased productivity because they will have comprehensive and easy-to-use developer tools.
And because open source offers a deeper understanding of the underlying mobile platform, they can better optimise their applications. Finally, the distribution and commercialisation of mobile apps will be less expensive and easier. Allows an application to monitor, modify, or abort outgoingcalls. It provides screen capture, log dump, and process examination capabilities.
The following are the advantages of Android: The VM used is called Dalvik, so named after the ancestral roots of its creator, as the story goes. What Is An Intent Receiver? An application class that listens for messages broadcast by calling Context. File - It is a block of arbitrary information, or resource for storing information. It can be of any type. Class - Its a compiled form of. Java file.
Android finally used this. It is not a file or a file type it is just a class that can be extended in Android for loading UI elements on view. Give An Example. Specify android id, layout height and width as depicted in the following example. Android supports 4 dialog boxes: An alert dialog box supports 0 to 3 buttons and a list of selectable elements, including check boxes and radio buttons. Among the other dialog boxes, the most suggested dialog box is the alert dialog box.
This dialog box displays a progress wheel or a progress bar. It is an extension of AlertDialog and supports adding buttons. In a domain, one or more computer can be a server to manage the network. On the other hand in aworkgroup all computers are peers having no control on each other.
In a domain, user doesn? In a work group user needs to have an account for every computer. In a domain, Computers can be on different local networks. In a work group all computers needs to be a part of the same local network. Press and Hold the icon or widget.
The phone will vibrate and on the bottom of the phone you will see anoption to remove.
While still holding the icon or widget drag it to the remove button. Once remove turns red drop the item and it is gone. What Is. The extension for an Android package file, which typically contains all of the files related to a single Android application.
The file itself is a compressed collection of an AndroidManifest. What Is A Layout Resource? An XML file that describes the layout of an Activity screen.
What Is A Manifest? An XML file associated with each Application that describes the various activies, intent filters, services, and other items that it exposes. What Is A Theme? A set of properties text size, background color, and so on bundled together to define various default display settings. Android provides a few standard themes, listed in R. Android uses URI strings both for requesting data e. Both are valid URI strings, but have different values.
All requests for data must start with the string? Action strings are valid URIs that can be handled appropriately by applications on the device; for example, a URI starting with?
What Is An Action? A description of something that an Intent sender desires. What Is Activity? A single screen in an application, with supporting Java code. A class Intent describes what a caller desires to do. This dialog box is used for selecting a date by the user. This dialog box is used for selecting time by the user. We use this as a filter to separate devices that can participate in the Android app ecosystem, and those that cannot. Devices that are properly compatible can seek approval to use the Android trademark.
Devices that are not compatible are merely derived from the Android source code and may not use the Android trademark. In other words, compatibility is a prerequisite to participate in the Android apps ecosystem.
What is the role of Android Market in compatibility? Devices that are Android compatible may seek to license the Android Market client software. What kinds of devices can be Android compatible? This allows developers to rely on a consistent set of capabilities when writing their apps.
The CDD will evolve over time to reflect market realities. For instance, the 1. As we make these changes, we will also augment Android Market to allow developers to retain control over where their apps are available.
To continue the telephony example, an app that manages SMS text messageswould not be useful on a media player, so Android Market allows the developer to restrict that app exclusively to phone devices. If my device is compatible, does it automatically have access to Android Market and branding?
Android Market is a service operated by Google. Achieving compatibility is a prerequisite for obtaining access to the Android Market software and branding. Device manufacturers should contact Google to obtain access to Android Market. How can I get access to the Google apps for Android, such as Maps? Contact android-partnerships google.
How to select more than one option from list in android xml file? Give an example. Specify android id, layout height and width as depicted in the following example. What is needed to make a multiple choice list with a custom view for each row? Multiple choice list can be viewed by making the CheckBox android: Why is it required?
TTL is a value in data packet of Internet Protocol. It communicates to the network router whether or not the packet should be in the network for too long or discarded.
Usually, data packets might not be transmitted to their intended destination within a stipulated period of time. The TTL value is set by a system default value which is an 8-bit binary digit field in the header of the packet. The purpose of TTL is, it would specify certain time limit in seconds, for transmitting the packet header.
When the time is exhausted, the packet would be discarded. Each router receives the subtracts count, when the packet is discarded, and when it becomes zero, the router detects the discarded packets and sends a message, Internet Control Message Protocol message back to the originating host What is Fragmentation?
Fragmentation is a process of breaking the IP packets into smaller pieces. Each fragment becomes a datagram in itself and transmitted independently from source. When received by destination they are reassembled. It contains a graphical interface that emulates an Android driven handheld environment, allowing them to test and debug their codes. What is the Android Architecture?
Android Architecture is made up of 4 key components: What is AAPT? This tool provides developers with the ability to deal with zip-compatible archives, which includes creating, extracting as well as viewing its contents. What is the use of an activityCreator? An activityCreator is the first step towards the creation of a new Android project. It is made up of a shell script that will be used to create new file system structure necessary for writing codes within the Android IDE. Differentiate Activities from Services.
Activities can be closed, or terminated anytime the user wishes.
On the other hand, services are designed to run behind the scenes, and can act independently. Most services run continuously, regardless of whether there are certain or no activities being executed. What items are important in every Android project? These are the essential items that are present each time an Android project is created: What is the importance of XML-based layouts? In common practice, layout details are placed in XML files while other items are placed in source files.
What is the importance of Android in the mobile market? Developers can write and register apps that will specifically run under the Android environment. This means that every mobile device that is Android enabled will be able to support and run these apps. With the growing popularity of Android mobile devices, developers can take advantage of this trend by creating and uploading their apps on the Android Market for distribution to anyone who wants to download it.
One app that runs on this particular version of Android OS may or may not run on another version. Another disadvantage is that since mobile devices such as phones and tabs come in different sizes and forms, it poses a challenge for developers to create apps that can adjust correctly to the right screen size and other varying features and specs.
What are the four essential states of an activity? What is the importance of settings permissions in app development? Permissions allow certain restrictions to be imposed primarily to protect data and code.
Without these, codes could be compromised, resulting to defects in functionality. What is the function of an intent filter?
Because every component needs to indicate which intents they can respond to, intent filters are used to filter out intents that these components are willing to receive. One or more intent filters are possible, depending on the services and activities that is going to make use of it. Enumerate the three key loops when monitoring an activity — Entire lifetime — activity happens between onCreate and onDestroy — Visible lifetime — activity happens between onStart and onStop — Foreground lifetime — activity happens between onResume and onPause Is there a case wherein other qualifiers in multiple resources take precedence over locale?
Yes, there are actually instances wherein some qualifiers can take precedence over locale. It contains the information about your app and provides the same to the Android system. Every Android system must have this information before running any app code. It describes the various components of the application which include Activity, Services, Content Providers, etc.
Also, it defines the classes which implement these components. It is responsible to protect the application and it declares the permission for accessing the protected part of the app.
It also declares the Android API which is going to be used by the application. It contains the library file details which are used and linked to the application. Q 27 What all devices have you worked on? Answer: There are many mobile devices available in the market with different operating systems. Answer: To understand the cause of the failure or cause of any issue, debugging is important.
On the Android platform Android Monitor. Q 29 Which scenario can test only on real devices but not on emulator? Answer: Emulators are used for performing similar kind of testing which is performed on the real devices. Basically, emulators are used as a replacement for real devices as sometimes real devices are not available for testing, use of real mobile devices for testing purpose is costlier at times.
But there are few scenarios which cannot be tested using emulator, these can be tested only using real devices. These scenarios are interrupted scenarios i. Q 30 Name the mobile automation tools that are available in the market.
Answer: There are quite a few mobile automation testing tools that are available in the market but these are used only if the project requires it and if the application supports the automation.