Suggested Certification for Android Development

Google Developers Certification, Associate Android Developer

Recommended Book 1 for Android Development

★★★★☆
Check Amazon for current price
View Deal
On Amazon

Recommended Book 2 for Android Development

★★★★☆
Check Amazon for current price
View Deal
On Amazon

Recommended Book 3 for Android Development

★★★★☆
Check Amazon for current price
View Deal
On Amazon

Recommended Book 4 for Android Development

★★★★☆
Check Amazon for current price
View Deal
On Amazon

Recommended Book 5 for Android Development

★★★★☆
Check Amazon for current price
View Deal
On Amazon

Note: *Check out these useful books! As an Amazon Associate I earn from qualifying purchases.

Interview Questions and Answers

TypeScript provides static typing, which helps catch errors during development, improves code readability, and enables better tooling support (e.g., autocompletion, refactoring).

Change detection is the process by which Angular updates the view when the applications data changes. Angulars default change detection strategy checks for changes in every component every time an event occurs, which can impact performance. Using OnPush change detection can optimize this process.

Angular provides the HttpClient module for making HTTP requests. You can use the HttpClient service to send GET, POST, PUT, DELETE, and other types of requests to a server.

AOT compilation compiles the Angular application during the build process, before the browser downloads and runs it. This results in faster rendering, smaller bundle sizes, and better security.

Observables are a core part of RxJS and are used to handle asynchronous data streams. They emit values over time, and components can subscribe to them to receive those values.

Performance optimization techniques include: Lazy loading modules, using OnPush change detection strategy, minimizing DOM manipulations, using Ahead-of-Time (AOT) compilation, and optimizing image sizes.

Pipes are used to transform data in Angular templates before displaying it to the user. Angular provides built-in pipes (e.g., DatePipe, UpperCasePipe) and allows you to create custom pipes.

RxJS (Reactive Extensions for JavaScript) is a library for reactive programming using Observables, making it easier to compose asynchronous and event-based code. Angular uses RxJS for handling asynchronous operations, such as HTTP requests and event streams.

Angular CLI (Command Line Interface) is a command-line tool that simplifies the creation, development, and maintenance of Angular applications. It provides commands for generating components, services, modules, and more, as well as building and deploying applications.

Angular offers two approaches to handling forms: Template-driven forms and Reactive forms (also known as Model-driven forms). Template-driven forms rely on directives in the template, while Reactive forms use explicit form control objects in the component class.

Directives are classes that add behavior to existing elements or modify the DOM structure. Angular provides built-in directives (e.g., *ngIf, *ngFor) and allows you to create custom directives.

Dependency Injection (DI) is a design pattern that allows dependencies to be injected into a class, rather than the class creating them itself. This promotes loose coupling and makes code more testable and maintainable.

A service in Angular is a class that encapsulates reusable logic and is injected into components or other services using Dependency Injection. Services are used to share data and functionality across multiple components.

Routing allows users to navigate between different views or components within an Angular application without reloading the entire page. The Angular Router module provides the necessary tools for defining and managing routes.

An Angular module is a container for a cohesive block of code dedicated to an application domain, a workflow, or a closely related set of capabilities. Angular modules are used to organize an Angular application into logical groups.

Data binding is the synchronization of data between the model and the view. Angular supports one-way data binding (from model to view or view to model) and two-way data binding (model and view are synchronized).

Angular is a complete rewrite of AngularJS. Key differences include: Angular uses TypeScript, a component-based architecture, mobile support, and improved performance. AngularJS used JavaScript, a controller-based architecture, and had performance issues with large applications.

A component in Angular is a basic building block of an Angular application. It controls a patch of the screen called a view. It consists of an HTML template, a TypeScript class, and metadata.

Angular is a TypeScript-based open-source web application framework led by the Angular Team at Google and by a community of individuals and corporations. Angular is a complete rewrite from the same team that built AngularJS.

Key features include: Component-based architecture, Dependency Injection, TypeScript, RxJS for asynchronous operations, Data binding (one-way and two-way), Routing, Modules, Services, Directives, and Angular CLI for rapid development.

Android Studio provides a powerful debugger that allows you to set breakpoints, step through code, inspect variables, and examine the call stack. You can also use logging statements (Log.d, Log.e, etc.) to print debugging information to the Logcat console.

Android Jetpack is a suite of libraries, tools, and architectural guidance to help developers build robust, testable, and maintainable Android apps. Key components include Lifecycle, LiveData, ViewModel, Room, Navigation, and Paging.

Android provides several options for storing data locally, including Shared Preferences (for small amounts of data), internal storage (for app-specific files), external storage (for files that can be accessed by other apps), SQLite databases (for structured data), and Room Persistence Library (an abstraction layer over SQLite).

Android provides several mechanisms for handling different screen sizes and densities, including using resource qualifiers (e.g., layout-sw600dp, drawable-hdpi), using `dp` (density-independent pixels) for dimensions, and using ConstraintLayout for flexible layouts.

`dp` (density-independent pixels) is used for specifying dimensions that should scale proportionally with the screen density. `sp` (scalable pixels) is used for specifying font sizes, and it scales proportionally with both the screen density and the users font size preferences.

Background tasks in Android can be handled using various techniques, including using `AsyncTask` (though discouraged for long-running tasks), `IntentService`, `JobScheduler`, or `WorkManager`. WorkManager is the recommended solution for deferrable and guaranteed background work.

Gradle is a powerful build automation system used for managing dependencies, compiling code, and packaging your Android application. It simplifies the build process and allows for customization.

Broadcast Receivers are components that respond to system-wide broadcast announcements. They allow your app to be notified of events like battery low, network connectivity changes, or incoming calls.

Content Providers manage access to a structured set of data. They allow different applications to share data in a controlled manner. Examples include accessing contacts, calendar events, or media files.

The Android manifest file is a crucial XML file that contains essential information about your Android application, such as its name, icon, permissions, required hardware features, and supported Android versions.

Layouts define the visual structure of your apps user interface. They describe how the UI elements (like buttons, text views, and images) are arranged on the screen. Common layout types include LinearLayout, RelativeLayout, ConstraintLayout, and FrameLayout.

An APK (Android Package Kit) is the file format used to distribute and install applications on Android devices. Its essentially the executable file for Android apps.

An Activity represents a single screen with a user interface in an Android application. Think of it as a window in a desktop application. An app can have multiple activities.

A Fragment represents a portion of a user interface in an Activity. It allows you to divide an Activitys UI into reusable components, making it easier to manage complex layouts and adapt to different screen sizes.

Intents are messaging objects that are used to request an action from another app component. They can be used to start an Activity, start a Service, or deliver a broadcast message.

A Service is an application component that can perform long-running operations in the background, without a user interface. Examples include playing music in the background or downloading data.

Android development is the process of creating applications for devices running the Android operating system. This includes smartphones, tablets, wearables, and Android TV.

The primary programming languages for Android development are Kotlin and Java. While Java was historically the dominant language, Kotlin is now Googles preferred language for Android development due to its conciseness, safety features, and interoperability with Java.

The Android SDK (Software Development Kit) is a set of development tools used to create Android applications. It includes libraries, a debugger, an emulator, documentation, sample code, and tutorials.

Android Studio is the official Integrated Development Environment (IDE) for Android development. It provides a comprehensive suite of tools for coding, debugging, testing, and profiling Android applications.

Android architecture is a software stack of components to support mobile device needs.

Android Framework is the stack of code that makes up the OS which includes native libraries. It includes tools to design UI, work with databases, handle user int

The main components of android architecture are:
-Applications
-Android Framework
-Android Runtime
-Platform Libraries
-Linux Kernel

Active, Paused, Stopped and Destroyed.

Advantages:

-Android is more customizable and almost anything can be changed
-Any new publication can be done quickly and without any review process on Android.
-Use a Different Messaging App for SMS
-Android Offers an Open Platform
-E

Java, Kotlin, C#, C++, and Python

Cannot run Java Bytecode on Android because Android uses Dalvik VM(virtual machine) instead of Java VM. To run a Java Bytecode you need JVM( Java Virtual Machine).

System Analysis is a method in which facts are gathered and interpreted, problems are defined and a system is decomposed into it's components. Design emphasizes a conceptual solution that fulfills the requirements, rather than it's implementation. Systems

NA

The steps of the design process include: Identify the need, Research. Brainstorm. Develop possible solutions. Construct a prototype. Test and evaluate. Revisions. Completion.

State- This is a value on an objects attribute at a given time. Behavior- This defines the behavior of the object, and their reactions. Identity- An object has an identity characterizing it's very life. The identification allows any object to be identifi

They are abstraction, encapsulation, inheritance, and polymorphism.

An interaction model is a design model that ties an application together in such a way as to benefit it's target users conceptual models. This determines how all the artifacts and behavior that are part of an application interrelate in ways that represent

Aggregation means a relationship where the child can exist independently of the parent. Composition insinuates a relationship where the child can not exist independently of the parent.

Relate with a project you have done.

The data structure is a data collection, management and storage system that allows for easy access and alteration. More specifically, the data structure is the set of data values, the relationship between them and the functions or operations that can be a

In a linear data structure, the data elements are organized in a linear order where every element is connected to it's previous and next adjacent elements. For a non-linear data structure, the data elements are hierarchically connected.

Traversing - access each data item exactly once; Searching - is used to find the location of one or more data items that fulfill the condition; Inserting - is add new data items to the given list of data items; Deleting -  is to remove a particular data i

Algorithm - is a procedure for solving a problem, based on conducting a sequence of specified actions. A computer program can be viewed as an elaborate algorithm.

Greedy Algorithms - is algorithm that follows the problem-solving heuristic

The most fundamental types of algorithm are: Recursive Algorithms, Dynamic programming algorithm, Backtracking algorithm, Divide and Conquer Algorithm, Greedy Algorithm, Brute Force Algorithm.

Recursion is a method used to allow a function call it'self. This technique offers a way to break down complicated problems into simple problems that are easier to solve.

Explain specific instances with respect to the job JD.

Model–view–controller(MVC) is a software design pattern used for developing user interfaces that separate the related program logic into three interconnected elements. Each of these components is built to handle specific development aspects of an applicat

Explain specific instances with respect to the job JD

(1) Choose the Right Technology when picking up a programming language, Database, Communication Channel.

(2) The ability to run multiple servers and databases as a distributed application over multiple time zones.

(3)Database backup, correct

Object-oriented programming is a programming paradigm based on the concept of \"objects\", which can contain data, in the form of fields, and code, in the form of procedures. A feature of objects is that objects' own procedures can access and often modif

Most modern development processes can be described as agile. Other methodologies include waterfall, prototyping, iterative and incremental development, spiral development, rapid application development, and extreme programming.

Software Development Life Cycle (SDLC) is a process used to design, develop and test high-quality software. Also referred to as the application development life-cycle.

Software testing is called the process or method of identifying errors in an application or system, such that the application works according to the requirement of end-users. It is an examination carried out to provide users the information on the quality

Explain specific instances with respect to the job JD.

A good software engineer is someone who is not only competent to write code but also competent to create, produce and ship useful software.

The primary aim of the code review is to ensure that the codebase overall product quality is maintained over time. It helps give a fresh set of eyes to identify bugs and simple coding errors. All of the tools and processes of code review are designed to

Use a phased life-cycle plan, Continuous validation, Maintain product control, Use the latest programming practices, Maintain clear accountability for results.

Software engineering always requires a fair amount of teamwork. The code needs to be understood by designers, developers, other coders, testers, team members and the entire IT team.

Schedule, Quality, Cost, Stakeholder Satisfaction, Performance

A software project manager determines the project specifications, builds the project team, draws up a blueprint for the whole project outlining the scope and criteria of the project, clearly communicates the project goals to the team; allocates budget, an

The most common software sizing methodology has been counting the lines of code written in the application source. Another approach is to do Functional Size Measurement, to express the functionality size as a number by performing Function point analysis.

The major parts to project estimation are effort estimation, cost estimation, resource estimate. In estimation, there are many methods used as best practices in project management such as-Analogous estimation, Parametric estimation, Delphi process, 3 Poi

software configuration management (SCM) is the task of tracking and controlling changes in the software code, part of the larger cross-disciplinary field of configuration management. Whereas change management deals with identification, impact analysis, do

Basecamp, Teamwork Projects, ProofHub, Zoho Projects, Nifty, Trello, JIRA, Asana, Podio, etc.

A feasibility study is a study that takes into account all of the related factors of a project — including economic, technological, legal, and scheduling considerations — to assess the probability of completing the project.

Functional requirements are the specifications explicitly requested by the end-user as essential facilities the system should provide. Non-functional requirements are the quality constraints that the system must satisfy according to the project contract,

Pseudocode is an informal high-level explanation of the operating principle of a computer program. It uses the structural conventions of a normal programming language but is intended for human reading rather than machine reading.

Validation is the process of checking whether the specification captures the user's needs, while verification is the process of checking that the software meets the specification.

Different Types Of Software Testing - Unit Testing, Integration Testing, System Testing, Sanity Testing, Smoke Testing, Interface Testing, Regression Testing, Beta/Acceptance Testing.

Quality control can be described as part of quality management that is focused on fulfilling quality requirements. While quality assurance relates to how a process is performed or how a product is made.

Single Responsibility Principle (SRP), Open/Closed Principle (OCP), Liskov Substitution Principle (LSP), Interface Segregation Principle (ISP), Dependency Inversion Principle (DIP).