SQLite is an in-process library that applies a self-contained, server less, zero-configuration, transactional SQL database engine. The code for SQLite is in the public domain just as an open source and is thus free for use for any purpose, commercial or private. SQLite is the most widely deployed database and popular in the world with more applications than we can count, including multiple high-profile projects. SQLite in general runs faster the more memory you give it. Nevertheless, performance is usually good even in low-memory environments. Depending on how variety it is used, SQLite most of the time can be faster than direct file system I/O.
SQLite interview questions