MySQL MCQs with answers Page - 70

                    A single unit of work for all commands executed consecutively is known as Transaction.                

                    To get the table's previous permanent status, use the rollback command.                

                    To start the transaction, Mysql > START ROLLBACK; command is used.                

                    TCL (Transaction Control Language) statement. ROLLBACK is a TCL statement that is used to undo changes made in a transaction and to restore the database to its previous state before the transaction started. TCL statements are used to control the changes made by transactions in a database. The other TCL statements are COMMIT and SAVEPOINT.                

                    Queries can be saved in a database, unlike filters that are used to temporarily sort, filter or modify data. Therefore, the correct option is (a) objects.