![]() ![]() SQLiteOpenHelper also provides getReadableDatabase() and getWritableDatabase() methods to obtain readable or writable instances of SQLiteDatabase, respectively. Rarely used, as downgrading may lead to data loss. onDowngrade(SQLiteDatabase db, int oldVersion, int newVersion): Similar to onUpgrade but handles downgrades. You can alter or drop tables and migrate data accordingly.Ĥ. onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion): Handles database schema upgrades by comparing versions. Here, you define tables and initial data.ģ. onCreate(SQLiteDatabase db): Called when the database is created for the first time. Constructor: Initializes the database with a specific name and version, using the application context.Ģ. SQLiteOpenHelper is a helper class for managing SQLite databases in Android. Can you explain the components of the Android SQLiteOpenHelper class and their roles in managing SQLite databases? ![]() ACID Compliance: SQLite ensures ACID compliance in low-concurrency environments MySQL/PostgreSQL maintain it even under high concurrency. Concurrency: SQLite uses file-level locking, limiting concurrent writes MySQL/PostgreSQL use row-level locking, allowing multiple transactions simultaneously.ĥ. Complexity: SQLite has simpler features and data types compared to feature-rich MySQL/PostgreSQL.Ĥ. Scalability: SQLite suits small-scale apps MySQL/PostgreSQL cater to large-scale applications with high concurrency.ģ. Deployment: SQLite is embedded within the app, while MySQL/PostgreSQL require separate server installations.Ģ. In contrast, MySQL and PostgreSQL are full-fledged, server-based relational databases. What are the main differences between using Android SQLite and other popular relational databases, such as MySQL or PostgreSQL?Īndroid SQLite is a lightweight, serverless, and self-contained database engine designed for mobile devices. So, let’s dive into the world of Android SQLite and explore its many facets together! 1. ![]() Whether you are new to Android development or seeking to expand your expertise in the realm of data persistence, these questions will serve as a valuable resource to enhance your grasp of Android SQLite and its practical applications. The aim of this collection is to provide you with a comprehensive understanding of Android SQLite’s nuances and equip you with the knowledge required to excel in interviews related to this topic. These questions encompass various aspects like architecture, implementation, best practices, and common challenges faced while working with SQLite databases in Android applications. In this article, we have compiled a list of frequently asked interview questions related to Android SQLite. With its small footprint and minimal setup requirements, SQLite has become the go-to choice for many developers when implementing data persistence in their Android apps. It provides an efficient means of storing, managing, and retrieving structured data on Android devices, making it ideal for building mobile applications that require local storage and offline capabilities. Android SQLite is a lightweight, serverless, and self-contained relational database management system (RDBMS) integrated into the Android operating system.
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