Suggested Certification for Mobile Application Developer

Associate Android Developer (Google), GIAC Mobile Device Security Analyst, MCSD: App Builder, Salesforce Certified Platform App Builder, MTA Developer (Microsoft)

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Interview Questions and Answers

Follow industry blogs, attend conferences and workshops, participate in online communities, and experiment with new frameworks and tools. Continuous learning is essential for staying relevant and competitive in the rapidly evolving field of mobile app development.

Common architectures include Model-View-Controller (MVC), Model-View-Presenter (MVP), Model-View-ViewModel (MVVM), and Clean Architecture. The best architecture depends on the complexity of the app and the development teams preferences.

CI/CD is a set of practices that automate the building, testing, and deployment of mobile apps. It allows developers to quickly and reliably release new features and bug fixes, improving development efficiency and reducing the risk of errors.

Use local storage options like SQLite, Realm, or Core Data (iOS). For more complex data management, consider using cloud-based databases like Firebase, AWS DynamoDB, or Azure Cosmos DB. Choose the best option based on your data requirements, performance needs, and security considerations.

Keep an eye on trends like 5G connectivity, artificial intelligence (AI), augmented reality (AR), virtual reality (VR), the Internet of Things (IoT), and serverless architecture. Understanding these trends can help you build innovative and future-proof mobile apps.

Mobile app monetization refers to the process of generating revenue from a mobile app. Common strategies include in-app advertising, in-app purchases, subscriptions, freemium models, and paid app downloads.

Use mobile analytics platforms like Google Analytics for Firebase, Amplitude, or Mixpanel. These tools provide insights into user behavior, app performance, and conversion rates, allowing you to make data-driven decisions to improve your app.

Push notifications are messages sent to users devices even when the app is not actively running. They can be used to deliver important updates, reminders, promotions, and personalized content to engage users and drive app usage.

Focus on creating a simple, intuitive, and visually appealing interface. Conduct user research and testing to understand user needs and preferences. Optimize for mobile devices, ensuring fast loading times and smooth interactions. Provide clear feedback and guidance to users.

Minimize network requests, optimize images and other assets, use efficient data structures and algorithms, implement caching mechanisms, and profile your code to identify performance bottlenecks. Avoid memory leaks.

Mobile app testing involves testing the functionality, usability, performance, security, and compatibility of a mobile app on different devices and platforms. Its crucial for identifying and fixing bugs, ensuring a positive user experience, and maintaining app quality.

Types of testing include unit testing, integration testing, UI testing, performance testing, security testing, usability testing, and acceptance testing. Each focuses on a different aspect of the application to ensure quality.

Follow the specific guidelines and requirements of each app store. This includes creating developer accounts, preparing app metadata (title, description, keywords), creating screenshots and videos, and adhering to content policies. Youll also need to build and sign your app using the appropriate certificates and provisioning profiles.

Use responsive design principles and techniques like Auto Layout (iOS) and ConstraintLayout (Android). Use vector graphics for icons and images to ensure scalability. Test your app on various devices and emulators to ensure it displays correctly on different screen sizes and densities.

Implement secure data storage and transmission (HTTPS). Validate user input to prevent injection attacks. Use strong authentication and authorization mechanisms. Protect against reverse engineering and code tampering. Regularly update dependencies and libraries.

Consider your target audience, business goals, and budget. iOS users tend to spend more and are often in higher-income demographics. Android has a larger market share globally. Developing for both platforms initially is expensive, so choose based on your priorities and resources.

Popular frameworks include React Native, Flutter, Ionic, Xamarin, NativeScript, and Swift UI. The best choice depends on your project requirements, teams skills, and performance expectations.

APIs (Application Programming Interfaces) are crucial for mobile apps to communicate with backend servers, databases, and third-party services. They allow apps to access and exchange data securely, enabling features like user authentication, data retrieval, and social media integration.

Essential languages include Java/Kotlin for Android and Swift/Objective-C for iOS. Cross-platform development often uses languages like JavaScript (with frameworks like React Native or Ionic), Dart (with Flutter), or C# (with Xamarin).

Native development targets a specific platform (iOS or Android) and uses its native languages and tools, resulting in better performance and access to device features. Cross-platform development allows you to write code once and deploy it on multiple platforms, saving time and resources, but may compromise performance or access to specific native functionalities.

The android framework is a set of APIs that enables developers to create apps for Android phones quickly and effortlessly.

Layers.

- Application.

- Application Framework.

- Android Runtime and Core/Native Libraries.

- Core Libraries.

- Linux Kernel.

- Device Drivers.

- Memory Management.

- Process Management.

OnCreate() - Called when the activity is first created.

OnStart() - Called when the activity becomes visible to the user.

OnResume() - Called when the activity starts interacting with the user.

OnPause() - Called when the current act

Advantages of android devices:

- Universal Chargers.

- Removable storage and battery.

- Access to the Best Android Widgets.

- Better hardware.

- Faster charging.

- Infrared.

- More App Choice

Java, C, C++, C# Basic, Lua, Kotlin.

We cannot run Java Bytecode on Android because: Android uses Dalvik VM(virtual machine) instead of Java VM.

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

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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 identifie

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 represen

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, correcti

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 modify

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 t

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 Poin

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, d

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).