Interview Questions and Answers

ACID stands for Atomicity, Consistency, Isolation, and Durability, ensuring the reliability of database transactions.

The WHERE clause filters records based on a specified condition, allowing selective data retrieval.

A foreign key is a field that refers to the primary key in another table. It enforces referential integrity by ensuring that values in the foreign key match values in the referenced table's primary key.

SERIAL is an auto-incrementing integer data type often used for creating unique identifiers in a column. It is commonly used for primary key columns.

The pg_ctl utility is used to start, stop, and control the PostgreSQL server, providing a convenient way to manage server processes.

The pg_dumpall utility is used to create a SQL script that can reconstruct an entire PostgreSQL database cluster, including all databases, users, and privileges.