Oracle 1Z1-921 Exam Questions : MySQL 2021 Implementation Essentials

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Oracle 1Z1-921 Exam Syllabus Topics:

Oracle MySQL 2021 Implementation Essentials Sample Questions:

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

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

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

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

3. Which MySQL command is used to grant specific privileges to a user on a database?
Response:

A) GIVE ACCESS
B) GRANT PERMISSIONS
C) SET PRIVILEGES
D) GRANT

4. By using the asynchronous MySQL Replication architecture, data can be replicated to slaves. Identify three use cases of MySQL Replication.

A) It allows backup to be done on the slave without impacting the master.
B) It provides multi-master access where the application can write and read data across the database servers.
C) MySQL Enterprise Backup will back up from Slave automatically.
D) You can create a slave server for reporting applications, which get only read access to the slave servers. It off-loads the master server. Additional servers allow different database server configuration.
E) MySQL Replication Connector/J (ReplicationDriver) is provided to allow read capability on slave and write capability on master.

5. 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 cannot insert a single line, you have to replace the entire document with a new document.
C) Any new lines can only be inserted at the end of the document.
D) You specify the new element,s position in the JSON_ARRAY_INSERT statement.

Solutions: