Oracle MySQL 2021 Implementation Essentials : 1Z1-921

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Oracle 1Z1-921 Exam Syllabus Topics:

Oracle MySQL 2021 Implementation Essentials Sample Questions:

1. Which two statements are true about the creation or use of a Virtual Cloud Network (VCN)?

A) You can connect directly to an instance over the internet, without a public IP address.
B) Your instance does not have a public IP address, so you cannot connect with a public subnet.
C) You can connect directly to the VCN without a define subnet.
D) You must have an Internet gateway to connect to a public address on an Oracle Linux instance.
E) You must have an IPSec VPN to connect to an Oracle Linux instance.

2. What is Kubernetes in the context of MySQL?
Response:

A) A database management tool for MySQL.
B) A cloud service provided by Oracle for MySQL databases.
C) An open-source container orchestration platform.
D) A database engine for MySQL.

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

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

4. 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) 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.
C) 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.
D) MySQL Enterprise Backup does not back up system data so that it is much faster.
E) 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.

5. How would you restrict a user Joe from accessing all MySQL database objects?

A) REVOKE ALL PRIVILEGES, GRANT OPTION FROM ,joe,@,%,;
B) UPDATE mysql.user SET Password=PASSWORD(,Invalid,) WHERE User=,joe';
C) CREATE USER ,joe'@,0.0.0.0, SET Password=PASSWORD(,% ! %,)
D) CREATE USER , joe,@1' %' DENY ALL PRIVILEGES
E) Insert Joe,s name into the mysql.user_restriction cable, and issue the FLUSH PRIVILEGES command.

Solutions: