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Oracle 1Z0-921 exam is a multiple-choice exam that is conducted by Oracle, the leading provider of database management systems. 1Z0-921 exam consists of 70 questions that need to be answered within 105 minutes. 1Z0-921 Exam is conducted in English and costs $245. Candidates who pass 1Z0-921 exam will be awarded the Oracle Certified Specialist (OCS) certification in MySQL 2021 Implementation Essentials.

Oracle MySQL 2021 Implementation Essentials Sample Questions (Q13-Q18):

NEW QUESTION # 13
Which three are requirements for MySQL Group Replication (GR)?

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

Answer: A,D,F

NEW QUESTION # 14
Which three options are valid reasons for using a primary key in a table?

A. increasing performance when using select statements
B. to make it easier to change the PRIMARY KEY value
C. preventing duplicate keys
D. maintaining a history of row insertions or updates
E. exporting data faster with mysqldump
F. automatic storage of data in a sorted order

Answer: A,C,E

NEW QUESTION # 15
Which three are levels in which MySQL Enterprise Monitor provides access control?

A. Specific data access: the rights to view specific types of potentially sensitive data
B. MySQL Enterprise Operations: the right to deploy the necessary MySQL Enterprise Agent
C. MySQL Enterprise Operations: the right to start/stop/restart/update MySQL Enterprise Monitor Services
D. Application administration: the rights to view or change the MySQL Enterprise Monitor configuration
E. Asset visibility: the rights to access data collected from hosts or MySQL instances

Answer: A,D,E

NEW QUESTION # 16
How would you restrict a user Joe from accessing all MySQL database objects?

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

Answer: E

NEW QUESTION # 17
You want to change the default behavior of MySQL Enterprise Monitor (MEM). New instances detected by a MEM agent should automatically monitor discovered instances.
How can you change the Advisor Setting?

A. Go to the configuration section (MEM) and configure the default login credentials.
B. Go to the configuration section (Users) and create a new user according to the existing users of your new MySQL instances.
C. Go to the configuration section (Advisors) and create a new advisor rule for new MySQL instances based on the MySQL Advisor Wizard.
D. Go to the configuration section (Advisors) and edit the default settings of the MySQL Process Discovery according to the existing users of your new MySQL instances.

Answer: D

NEW QUESTION # 18
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