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Oracle MySQL 2021 Implementation Essentials Sample Questions:

1. Which is true about inserting an additional line in a single document stored in MySQL document store?

A) The path specified must be an array position past the end of an array using the JSON_POSITION statement.
B) You specify the new element,s position in the JSON_ARRAY_INSERT statement.
C) Any new lines can only be inserted at the end of the document.
D) You cannot insert a single line, you have to replace the entire document with a new document.

2. Which three are requirements for MySQL Group Replication (GR)?

A) The use of global transaction identifiers is required.
B) Data to be replicated must be stored in the InnoDB transactional storage engine.
C) GR only works with MySQL versions 8.0.12 or higher.
D) The binary log format must be set to mixed.
E) The minimum number of required nodes for achieving a consensus is two.
F) Primary keys are required on every replicated table.

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

4. The MySQL Enterprise Monitor Agent requires a user configured in each MySQL instance that is being monitored with suitable privileges to collect information about the server.
Which statement is correct?

A) Monitoring metrics need super and root privileges because they are not available for a less-privileged user.
B) The super privilege is required when creating and populating the inventory table, as well as running statements such as show master logs or SHOW ENGINE INNODB STATUS.
C) The super privilege is required when starting, stopping, or restarting monitored MySQL databases.
D) MySQL Enterprise Monitor creates the required users automatically.

5. When should you perform a backup in a MySQL database?
Response:

A) After every successful query execution.
B) Only during scheduled maintenance windows.
C) Only when the database size exceeds a certain limit.
D) After critical data updates or before making significant changes to the database.

Solutions: