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Oracle MySQL 2021 Implementation Essentials Sample Questions:

1. The slave connects to the master and asks for updated records. What command was issued for this to happen?

A) RUN SLAVE
B) SLAVE START
C) START SLAVE
D) START RUN SLAVE
E) SLAVE RUN

2. You have been using mysqldump for logical backups of your MySQL databases. Your MySQL database size has been growing. Which two options can reduce the backup size and speed up the backup time?

A) Use MySQL Enterprise Backup with the - -size=compress to compress the backup file.
B) Use MySQL Enterprise Backup with the - - incremental policy to back up incrementally based on previous full backup.
C) Use mysqldump with the - -changesonly option.
D) Use mysqldump with - -incremental together with the - -compress option to back up incrementally based on previous full backup and compress the incremental backup files.
E) Use MySQL Enterprise Backup with the - -compress option to compress the backup files and use - - compress-level to select the level of compression.

3. After installing MySQL 8.0, you initialize the data directory with the --initialize command. Which two are places where you can find the root password?

A) As root, execute the show password command by using the SHA-256 password encryption plug-in.
B) The root password displayed on the screen via a [warning] message.
C) The root password is not given and is blank. You must manually set the root password.
D) The root_pw variable stored in the mysq1.install table.
E) The root password inserted in the error log set by the --log-error=[file_name] variable

4. The replication for a Master and Slave MySQL Servers is up and running. The disk space for Master Server is continuously growing. The binlog size keeps growing. Which two methods can fix the issue?

A) Delete all binlog files manually on the file system to release storage spaces.
B) To safely purge binary log files, perform these steps:
C) Set the expire_logs_days system variable to expire binary log files automatically after a given number of days.
D) Execute the purge binary logs statement without argument.
E) On the Master server, disable binlog by removing the --log-bin option.

5. An existing MySQL Database environment has been doing backup and restore in a logical way by using the mysq1dump and mysq1 client utilities. When the backup is started using mysqldump with single-transaction mode, the existing application has long wait time. When the restore is required, it takes more than three hours to restore.
What two are benefits of using mysqlbackup from MySQL Enterprise Backup in this situation?

A) mysqlbackup from MySQL Enterprise Backup allows logical backup with concurrency built in to get faster backup speed and restoration speed.
B) mysqlbackup utilities dump the full database into a SQL file, which is imported into the mysql client in single-thread mode. mysqlbackup restores data from physical backups. Physical backup methods are faster than logical methods because they involve only file coping without conversion.
C) MySQL Enterprise Backup does not back up system data so that it is much faster.
D) MySQL Enterprise Backup provides tape backup integration by default. It has the virtual tape option, which allows backup to tape device directly without extra third-party software integration.
E) mysqlbackup can back up tables with the InnoDB engine without blocking. The backup is hot with InnoDB. Together with Incremental Backup, mysqlbackup from MySQL Enterprise Backup shortens the backup windows.

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