Fluentgrid Junior Database Developer Interview Questions and Answers

PostgreSQL follows a client-server model architecture with a multi-process architecture.

• PostgreSQL follows a client-server model architecture

• It has a multi-process architecture with a separate process for each client connection

• The main components include the PostgreSQL server process, shared memory, and background processes

• It supports multiple storage engines and has a flexible plugin architecture

WAL is a method used in database systems to ensure data integrity by writing changes to a log before updating the actual data.

• WAL is a protocol used to guarantee that no data modifications are lost in case of a system crash.

• Changes are first written to a log file before being applied to the actual data files.

• This allows for quick recovery and ensures data consistency.

• Examples of databases that use WAL include PostgreSQ