# Android Networking (Android) > HTTP, REST API, Retrofit, OkHttp, JSON parsing, Network security - 29 interview questions - Junior - [Interview Questions: Android](https://sharpskill.dev/en/technologies/android/interview-questions.md) ## 1. Which permission is needed to access Internet? **Answer** The permission must be declared in AndroidManifest.xml. It's a normal permission (not dangerous) that doesn't require runtime request. Without this permission, any network connection attempt will fail with a SecurityException. ## 2. What is Retrofit? **Answer** Retrofit is a type-safe HTTP client for Android and Java developed by Square. It turns an HTTP API into a Java/Kotlin interface with annotations. Retrofit automatically handles JSON serialization/deserialization, asynchronous requests, and integrates with OkHttp, Coroutines, RxJava. It's Google's recommended solution for network calls. ## 3. What are the main HTTP methods? **Answer** Main HTTP methods are: GET (retrieve resources), POST (create a resource), PUT (completely update a resource), PATCH (partial update), DELETE (delete a resource), HEAD (retrieve headers only), OPTIONS (communication options). GET and DELETE are idempotent, POST is not. ## 26 more questions available - What is the HTTP GET method used for? - What is the HTTP POST method used for? Sign up for free: https://sharpskill.dev/en/login ## Other Android interview topics - [Android Fundamentals](https://sharpskill.dev/en/technologies/android/interview-questions/android-fundamentals.md): 24 questions, Junior - [Android UI and Resources](https://sharpskill.dev/en/technologies/android/interview-questions/android-ui-and-resources.md): 30 questions, Junior - [Android Lifecycle](https://sharpskill.dev/en/technologies/android/interview-questions/android-lifecycle.md): 30 questions, Junior - [Android Navigation](https://sharpskill.dev/en/technologies/android/interview-questions/android-navigation.md): 26 questions, Junior - [Android Data Management](https://sharpskill.dev/en/technologies/android/interview-questions/android-data-management.md): 29 questions, Junior - [Android Testing](https://sharpskill.dev/en/technologies/android/interview-questions/android-testing.md): 28 questions, Junior - [Android Gradle](https://sharpskill.dev/en/technologies/android/interview-questions/android-gradle.md): 26 questions, Junior - [Kotlin Language Essentials for Android](https://sharpskill.dev/en/technologies/android/interview-questions/android-kotlin-language-essentials.md): 24 questions, Junior - [Room Database](https://sharpskill.dev/en/technologies/android/interview-questions/android-room-database.md): 25 questions, Mid-Level - [Background Work](https://sharpskill.dev/en/technologies/android/interview-questions/android-background-work.md): 18 questions, Mid-Level - [Jetpack Compose](https://sharpskill.dev/en/technologies/android/interview-questions/android-compose.md): 28 questions, Mid-Level - [Permissions and Device Features](https://sharpskill.dev/en/technologies/android/interview-questions/android-permissions-and-device.md): 21 questions, Mid-Level - [Firebase for Android](https://sharpskill.dev/en/technologies/android/interview-questions/android-firebase.md): 23 questions, Mid-Level - [Android MVVM Architecture](https://sharpskill.dev/en/technologies/android/interview-questions/android-mvvm-architecture.md): 18 questions, Mid-Level - [Advanced Android Networking](https://sharpskill.dev/en/technologies/android/interview-questions/android-networking-advanced.md): 13 questions, Mid-Level - [Kotlin Collections and Operators](https://sharpskill.dev/en/technologies/android/interview-questions/android-kotlin-collections-operators.md): 20 questions, Mid-Level - [Kotlin Coroutines and Flow](https://sharpskill.dev/en/technologies/android/interview-questions/android-kotlin-coroutines-flow.md): 20 questions, Mid-Level - [Android Dependency Injection](https://sharpskill.dev/en/technologies/android/interview-questions/android-dependency-injection.md): 15 questions, Mid-Level - [Android MVI Architecture](https://sharpskill.dev/en/technologies/android/interview-questions/android-mvi-architecture.md): 17 questions, Mid-Level - [Android Clean Architecture](https://sharpskill.dev/en/technologies/android/interview-questions/android-clean-architecture.md): 21 questions, Senior - [Android Compose Advanced](https://sharpskill.dev/en/technologies/android/interview-questions/android-compose-advanced.md): 17 questions, Senior - [Android Performance and Monitoring](https://sharpskill.dev/en/technologies/android/interview-questions/android-performance-monitoring.md): 13 questions, Senior - [Android Security and Privacy](https://sharpskill.dev/en/technologies/android/interview-questions/android-security-privacy.md): 18 questions, Senior - [Android CI/CD and Release](https://sharpskill.dev/en/technologies/android/interview-questions/android-cicd-release.md): 15 questions, Senior - [Android UX and Form Factors](https://sharpskill.dev/en/technologies/android/interview-questions/android-ux-form-factors.md): 18 questions, Senior - [Android Testing Advanced](https://sharpskill.dev/en/technologies/android/interview-questions/android-testing-advanced.md): 18 questions, Senior --- Source: SharpSkill (https://sharpskill.dev), tech interview preparation for your real stack. 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