10+ Cuemath Interview Questions and Answers

Developed a social media app using Kotlin and MVVM architecture.

• Used Kotlin for coding the app

• Implemented MVVM architecture for better code organization

• Integrated Firebase for real-time database and authentication

• Used Glide library for image loading and caching

• Implemented RecyclerView for displaying posts and comments

Broadcast is a messaging system in Android that allows communication between different components of an app or between different apps.

• Broadcast is a way to send messages to multiple components or apps at once.

• There are two types of broadcasts: ordered and unordered.

• Ordered broadcasts are delivered to receivers in a specific order, while unordered broadcasts are delivered to all receivers at once.

• Broadcasts can be used for various purposes such as sending system events, notify...read more

Marker interface is an empty interface used to mark a class as having a particular property or behavior.

• Marker interface has no methods or fields, it is used to provide metadata to the code.

• It is used to indicate that a class has a certain capability or should be treated in a special way.

• Examples of marker interfaces are Serializable, Cloneable, and Remote.

• Interfaces are used to achieve abstraction and provide a contract for implementing classes.

• Interfaces are used to achieve...read more

Constraint layout is preferred for its flexibility and efficiency.

• Allows for complex layouts with minimal nesting

• Supports responsive design and animations

• Reduces the need for nested layouts

• Improves performance by reducing layout hierarchy

• Easier to maintain and update layouts

• Compatible with Android Studio's Layout Editor

Fragments are reusable UI components in Android used to create flexible and dynamic user interfaces.

• Fragments allow for modularization of UI components

• They can be reused across multiple activities

• They can be added or removed dynamically at runtime

• They help in creating responsive UIs for different screen sizes

• Example: A news app can use a fragment to display a list of articles and another fragment to display the details of a selected article

Android has four main components: Activities, Services, Broadcast Receivers, and Content Providers.

• Activities: UI components that represent a single screen with a user interface.

• Services: Background components that perform long-running operations.

• Broadcast Receivers: Respond to system-wide broadcast announcements.

• Content Providers: Manage a shared set of app data that can be accessed by other apps.

Intent is used to start an activity or service. PendingIntent is used to perform an action on behalf of another application.

• Intent is used to start an activity or service within the same application or in another application.

• PendingIntent is used to perform an action on behalf of another application, such as starting an activity or sending a broadcast.

• Intent can be used to pass data between activities or services.

• PendingIntent is used to grant permission to another applicatio...read more

Retrofit is a type-safe HTTP client for Android and Java.

• Retrofit simplifies the process of sending network requests and handling responses.

• It uses annotations to define API endpoints and request parameters.

• Retrofit also supports various data formats such as JSON, XML, and Protocol Buffers.

• It can be used with other libraries like OkHttp for better performance.

• Retrofit is widely used in Android development for consuming RESTful APIs.

MVVM is a design pattern that separates UI code from business logic using a ViewModel.

• MVVM stands for Model-View-ViewModel

• Model represents the data and business logic

• View represents the UI

• ViewModel acts as a mediator between the Model and View

• ViewModel exposes data and commands to the View

• MVVM helps in unit testing and maintainability

• Example: Android Architecture Components provide support for MVVM

Android supports various types of storage options for storing data.

• Internal Storage

• External Storage

• Shared Preferences

• SQLite Databases

• Network Connection

An activity is a single, focused thing that the user can do. It represents a single screen with a user interface.

• Activities are the building blocks of Android applications.

• They are responsible for creating a window in which the app draws its user interface.

• Activities have a lifecycle that defines how they are created, started, paused, resumed, stopped, and destroyed.

• Examples of activities include login screen, settings screen, and profile screen.