Top Android Interview Questions and Answers 2023 will be based more upon the basic information related to Android development and you have to start preparing for the interview at least one week prior in order to grasp all of the knowledge that you have related to the job and also related to the type of development that you will be doing. Android development is forever getting popular as a career option and it has been now considered one of the most profitable career options because of the increased number of apps available on the Google Play Store. You can check out some of the most important interview questions that are often asked from the interviewer to the Employees seeking jobs.
Android Interview Questions and Answers 2023
If you are planning to become an Android developer then you must take into consideration interviews that will be taken by the interviewers while you are searching for your new job related to android development. During the interview, it is important to take into consideration some basic information related to the job that you will be applying for and then you will have to start your preparation taking into consideration some basic questions that the interview can ask related to Android and Android development. Given below, we are sharing some important questions that you will be asked by the interviewer for the Android development job that you are applying for.
- What is the difference between explicit intent and implicit intent?
In an explicit intent, the activity that is required to respond to the intent is specified. To be precise, the target components are explicitly designated. This is typically used for application internal messages. In an implicit intent, only the intent is declared and the activity that can respond to the intent is left to the platform. Here the target component is not declared, hence it is usually used for activating components of other applications as well.
- What do you mean by AndroidManifest file?
Applications confirm their components like the .apk file that also holds the application’s code, files, and resources in a manifest file that’s bundled into the Android package. The manifest is a structured XML file and is always named AndroidManifest.xml for all applications. It is also used for naming libraries of the application that needs to be linked and identifying any permissions the application expects to be granted.
- What do you mean by Dalvik Virtual Machine?
Dalvik is the name of Android’s virtual machine. The Dalvik VM is an interpreter-only virtual machine that executes files in the Dalvik Executable (.dex) format, a format that is optimized for effective storage and memory-mappable executions. The virtual machine is register-based and can run classes compiled by the Java language compiler that have been altered into its native format using the included ‘dx’ tool. The VM runs on top of Posix-compliant operating systems depending on it for performing threading and low-level memory management functionalities. The Dalvik core class library is envisioned to provide a familiar development base for those used to programming with Java Standard Edition but is geared explicitly for the needs of a small mobile device.
- What do you mean by Android Runtime?
Android comprises a set of core libraries that provides most of the functionality available in the core libraries of Java. All Android application runs in their own process, with their own instance of the Dalvik virtual machine. Dalvik has been written in order for the device to run multiple VMs competently. The Dalvik VM executes files in the Dalvik Executable (.dex) format which is boosted for minimal memory footprint. The VM is register-based and runs classes compiled by a Java language compiler that have been transformed into the ‘.dex’ format by the included ‘dx’ tool.
- What do you mean by Open Handset Alliance?
The OHA is a conglomerate of 84 technologies and mobile companies that have joined hands to fast-track innovation in mobile technology and at the same time, offer the end-users an improved, cost-effective and richer mobile experience. Members of this alliance include Google, HTC, Sony, Dell, Intel, Motorola, Qualcomm, Texas Instruments, Samsung, LG, T-Mobile, Nvidia. The OHA was started on 5th November 2007 by Google and 34 other companies. Android is the main software of this alliance.
- What do you mean by a Service?
A Service is an application component representing either an application’s intent to perform a longer-running operation without interacting with the user or to provide functionality for other applications to use. Services run without a dedicated GUI, but like Activities and Broadcast Receivers, they are executable in the main thread of the application’s process. A Service could be a facility for an application to expose some of its functionality to other applications.
- What do you mean by the Android emulator?
The AE is the implementation of the Android Virtual Machine, designed to run processes within a virtual device itself, which can be used on a development computer. The main use of this tool is in the testing and debugging of Android applications.
- Explain the Android Interface Definition Language.
Android Interface Definition Language or AIDL facilitates the communication between the client and service. For the procedure of communication between processes, the data is split into small portions which are easily recognized by the Android platform.
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