Name: MySQL 2019 Implementation Essentials
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Free Oracle 1Z0-920 Exam Actual Questions

The questions for 1Z0-920 were last updated On Dec 17, 2025

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Question No. 1

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?

AOn the Master server, disable binlog by removing the --log-bin option.

BSet the expire_logs_days system variable to expire binary log files automatically after a given number of days.

CTo safely purge binary log files, perform these steps:
1. On each slave server, use show slave status to check which log file it is reading.
2. Obtain a listing of the binary log files on the master server with show binary logs.
3. Determine the earliest log file among all the slaves. This is the target file. If all the slaves are up-to-date, this is the last log file on the list.
4. Make a backup of all the log files you are about to delete. (This step is optional, but always advisable.)
5. Purge all log files up to but not including the target file by using the purge binary logs statement

DExecute the purge binary logs statement without argument.

EDelete all binlog files manually on the file system to release storage spaces.

Show Answer

Correct Answer: B, C

Question No. 2

What three are ways to export and import data in MySQL Workbench?

AResult Data Export and Import

BBinary Data Export and Import Wizard

CSQL Data Export and Import Wizard

DBackup Data Export and Import Wizard

ETable Data Export and Import Wizard

FData Modeling Import Export Wizard

Show Answer

Correct Answer: A, C, E

6.5.1 Table Data Export and Import Wizard

6.5.2 SQL Data Export and Import Wizard

6.5.3 Result Data Export and Import

There are three ways to export and import data in MySQL Workbench, each serving a different purpose.

https://dev.mysql.com/doc/workbench/en/wb-admin-export-import.html

Question No. 3

You execute this statement:

SELECT NULL=NULL;

What is the result?

AFALSE

BNULL

DTRUE

Show Answer

Correct Answer: B

Question No. 4

You just installed MySQL by Using a Package Manager on Linux.

Where are the default InnoDB redo log files stored?

A/usr/mysql

B/var/lib/mysql

C/var/lib/mysql/innodb

D/usr/bin/logs

E/usr/redo

F/etc/my.cnf

Show Answer

Correct Answer: E

https://dev.mysql.com/doc/refman/8.0/en/innodb-redo-log.html

Question No. 5

You have three machines with MySQL Databases running on Linux platform.

Which backup procedures would allow online and remote backup of the MySQL Database on the three machines to a connected Storage NFS?

A1. Mount the Remote Storage NFS volume to each of the three machines with proper privilege for the backup OS user to have all access.2. Install MySQL Enterprise Backup on machine which is used to start the backup.3. Start mysqlbackup on only one machine with the installation to back up the databases for the three machines to the mounted volume using - -backup-dir and by giving--hosts=machine1:port1, machine2:port2, machine3:port3.4. Validate the backups using the mysqlbackup program to ensure that the backups created are valid.

B1. Mount the Remote Storage NFS volume to each of the three machines with proper privilege for the backup OS user to have all access.2. Install MySQL Enterprise Backup on all three machines.3. Start mysqlbackup on all machines to back up the database to the mounted volume using - -backup-dir.4. Validate the backup using the mysqlbackup program to ensure that the backup created is valid.

C1. Mount the Remote Storage NFS volume to each of the three machines with proper privilege for the backup OS user to have all access.2. Install MySQL Enterprise Backup on the machine that is used to start the backup.3. Start mysqlbackup on only one machine with the installation to back up the databases for the three machines to the mounted volume using - - backup-dir and by specifying -- config-files=my1.cnf, my2.cnf, my3.cnf.my1.cnf, my2cnf, and my3.cnf are the MySQL Database Configuration files on the three machines.4. Validate the backup by using the mysqlbackup program to ensure that the backup created is valid.

D1. Mount the Remote Storage NFS volume to each of the three machines with proper privilege for the backup OS user to have all access.2. Install MySQL Workbench on a separate machine, which is used to connect to the three machines to back up and restore.3. Startup MySQL backup from MySQL Workbench to back up the three databases.4. Validate the backup by using MySQL Workbench to ensure that the backup created is valid.

Show Answer

Correct Answer: B