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Oracle MySQL 2021 Implementation Essentials Sample Questions:

1. Which two deployment architectures could you use for scaling-out database reads?

A) Changing the system setting with memory stickiness to true in order not to swap out mysq1dfrom memory.
B) Implementing a three-node, single-primary InnoDB Cluster.
C) Edit the configuration file and increase the value for parallel_read_workers and reboot the server
D) Adding a memcached-tier for caching data and objects in RAM to reduce the number of times an external data source must be read.
E) Altering the storage engine for all tables to memory to increase performance.

2. 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?

A) 1. 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.
B) 1. 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.
C) 1. 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.
D) 1. 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.

3. You need to change the password level for a test system.
Which two allow to change this level before you create new test user/passwords?

A) SET GLOBAL force_password_complex_policy=0;
B) Add validate_password_policy=,new level, in the [mysqld] section of the MySQL configuration file.
C) SET GLOBAL validate_password_policy=,new level,;
D) Add validate_password=,new level, in the [security] section of the MySQL configuration file.

4. Which query will find rows in a table that have no counterpart in another table?

A) SELECT *FROM table1 INNER JOIN table2 ON table1.id=table2.id WHERE table1.id=! table2.id;
B) SELECT t1.name, t2.name2FROM employee AS t1 INNER JOIN info AS t2 ON t1.name= t2.name2;
C) SELECT left_tbl.*FROM left_tbl LEFT JOIN right_tbl ON left_tbl.id=right_tbl.idWHERE right_tbl.id IS NULL;
D) SELECT t1.name, t2.name2FROM employee t1 INNER JOIN info t2 WHERE t1.name=t2.name;

5. Which statement adds a column with the largest integer data type?

A) ALTER TABLE SCIENTIFIC ADD scientific_value INTEGER;
B) ALTER TABLE SCIENTIFIC ADD scientific_value BIGINT;
C) ALTER TABLE SCIENTIFIC ADD scientific_value DECIMAL(15,10);
D) ALTER TABLE SCIENTIFIC ADD scientific_value DECIMAL(10,10);

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